KR100667511B1 - Electronic paper display device having widespread adhesive region - Google Patents

Abstract

An electronic paper display device is provided to widen the width of an adhesive region defined by crossing of a horizontal barrier wall and a vertical barrier wall, thereby effectively attaching barrier walls to both substrates. A lower substrate and an upper substrate are disposed to face each other. A lower electrode and an upper electrode are internally contacted with the lower substrate and the upper substrate. Horizontal and vertical barrier walls(4a,4b) form pixel spaces(5) between the lower electrode and the upper electrode. A plurality of charged particles are sealed in the pixel spaces. Adhesive regions(4c) are formed by crossing of the horizontal barrier walls and the vertical barrier walls. The adhesive regions have larger width than that of the horizontal barrier walls or the vertical barrier walls.

Description

Electronic Paper Display Device Having Widespread Adhesive Region

1 is a cross-sectional view showing a cell structure of an electronic paper display device according to the prior art,

2 is a schematic diagram showing a state in which the partition wall of the electronic paper display device according to the prior art is attached to the substrate and the electrode,

3 and 4 are a perspective view and a cross-sectional view showing a partition structure of the electronic paper display device according to the prior art,

5 is a perspective view illustrating a substrate and an electrode structure of an electronic paper display device according to an exemplary embodiment of the present invention.

6 to 8 are a plan view and a perspective view showing the octagonal partition structure of the electronic paper display device according to an embodiment of the present invention,

9 and 10 are plan views illustrating a pentagonal partition structure of an electronic paper display device according to an exemplary embodiment of the present invention.

11 and 12 are plan views illustrating a hexagonal partition structure of the electronic paper display device for explaining the present invention and a hexagonal partition structure according to a preferred embodiment of the present invention.

13 is a plan view illustrating a hexagonal partition structure of an electronic paper display device according to an exemplary embodiment of the present invention.

14 is a plan view illustrating a circular partition wall structure of an electronic paper display device according to an exemplary embodiment of the present invention.

15 is a schematic diagram showing a state in which a partition wall of an electronic paper display device is attached to a substrate and an electrode according to an exemplary embodiment of the present invention.

16 is a cross-sectional view illustrating a cell structure of an electronic paper display device according to an exemplary embodiment of the present invention.

** Description of Symbols for Main Parts of Drawings **

1: lower substrate 2: lower electrode

3: lower insulation layer 4: partition wall

4a: transverse bulkhead 4b: vertical bulkhead

4c: bonding area 5: pixel space

6: upper substrate 7: upper electrode

8: upper insulating layer 9: particle

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to electronic paper, and more particularly to an electronic paper display device having a wide range of adhesive regions. More specifically, the electronic paper display device is characterized in that the width of the adhesive region formed by the intersection of the horizontal and vertical bulkheads is wider than the width of each of the horizontal and vertical bulkheads.

Electronic paper is a display device that displays characters or images by millions of beads scattered between flexible substrates such as thin plastics, and can be reproduced and used millions of times. It is expected to be a material to replace the print media.

The technical approach for the implementation of the electronic paper display device is to use a liquid crystal, organic EL, reflective film reflective display, electrophoresis, twist ball, mechanical reflective display in addition to the electrophoretic phenomenon. Among them, the display display device using the electrophoresis phenomenon is currently attracting the most attention. It is based on electrophoresis, which applies electromagnetic fields to conductive materials to make it moveable. It distributes conductive particles between thin flexible substrates and then collides the particles by changing the polarity of the electromagnetic field. The data is represented by a change in the arrangement of the charged particles in the direction of the arrow. A representative view of such an electrophoretic electronic paper display device is shown in FIG. 1 and briefly described as follows.

1 is a cross-sectional view illustrating a cell structure of an electronic paper display device according to the prior art. As shown, the structure includes upper and lower substrates 70 and 10 formed of plastic or glass, and upper and lower electrodes formed of transparent electrode ITO to apply a driving voltage of the device on the upper and lower substrates. 80 and 20, upper and lower insulating layers 90 and 30 selectively coated on the upper and lower electrodes, a partition wall 40 separating the cell and the cell, and a white tablet formed between the two electrodes. It consists of the positive charged particle 50 and the black negative charged particle 60.

In the electronic paper display device having the above structure, when sufficient voltage is applied to the upper electrode 80 and the lower electrode 20, charged particles 50 and 60 charged according to the applied electrode polarity are attracted to each electrode. . For example, when-voltage is applied to the upper electrode 80 and + voltage is applied to the lower electrode 20, the white charged particles 50 positively charged by the coulomb force move toward the upper substrate 70. The charged black charged particles 60 move toward the lower substrate 10. Since the white charged particles 50 are located on the upper substrate 70 side, the white charged particles 50 appear to be white when viewed from the outside. On the contrary, when + voltage is applied to the upper electrode 80 and-voltage is applied to the lower electrode 20, the negatively charged black charged particles 60 move toward the upper substrate 70, and the positively charged white charged particles ( 50 is moved toward the lower substrate 10 to be displayed in black. Therefore, after applying a voltage so that all the cells appear white at first, only the desired cell is applied with the opposite voltage so that the cells appear black.

In the electrophoretic electronic paper display device according to the related art, partition walls 40 vertically connected to opposing substrates are formed to prevent movement of charged particles in a parallel direction of the substrate, and a plurality of partitions divided into the partition walls are provided. An electronic paper display device comprising a display unit for electronic paper by a display cell of.

As shown in FIG. 2, the upper electrode 80 and the upper substrate 70 are formed in the conventional electronic paper display device having the partition wall formed by the above-described method. 2 is a schematic diagram showing a state in which a partition of an electronic paper display device according to the related art is attached to a substrate and an electrode. As shown here, the upper plate of the electronic paper display device is formed by forming a transparent upper electrode 80 and an upper insulating layer (not shown) on the upper substrate 70, and the lower plate is lowered on the lower substrate 10. The electrode 20 and the lower insulating layer (not shown) are formed. Here, although the upper and lower insulating layers are omitted, there is no problem in driving, but is preferably selected to reduce the movement of the charged particles attached to the electrode. In this case, the upper electrode 80 may also have the same structure as the lower electrode 20 shown in FIG. 1, and the direction of the upper electrode 80 is provided with the partition wall 40 between the lower electrode 20 and the lower electrode 20. Stacked in a direction perpendicular to the

A partition wall 40 exists in the electronic paper display device, and the partition wall 40 separates the pixel from the pixel, and maintains the gap between the upper plate and the lower plate. In the electronic paper display device, the partition wall 40 stacked between the upper plate and the lower plate should have a certain width because it must have an adhesive force with the upper and lower plates according to a predetermined width of the upper end of the partition wall. However, in the conventional bulkhead, as shown in FIG. 3, the horizontal and vertical bulkheads intersect each other to have a lattice shape, and the width of the area where the partitions intersect is also equal to the horizontal and vertical bulkhead widths. It was common.

In FIG. 4, the partition structure of the electronic paper display device according to the related art is shown in cross-section. As shown here, since the conventional partition wall is a grid-shaped partition structure having a rectangular pixel space, The vertical bulkheads have the same width, and the width of the area where these partitions intersect is also the same as the horizontal and vertical bulkhead widths. Thus, the grid-shaped barrier rib structure having a rectangular pixel space has a narrow width of the barrier ribs, and the area where the barrier ribs intersect is too small, so that it is difficult to dispense an adhesive that bonds the substrate and the barrier ribs. There is this.

And even if the adhesive is successfully dispensed in the intersection of the narrow barrier rib and the small width, it is difficult to expect sufficient adhesive strength so that the substrate and the barrier rib do not easily fall due to the narrow barrier rib width. In addition, in the flexible electronic paper display device, since the adhesive force between the substrate and the partition wall requires a higher adhesion force than other flat panel displays, there is an urgent need for another method to increase the adhesion between the substrate and the partition wall. .

In the electronic paper display device, since the width of the barrier ribs determines the size of the region through which light emitted from the pixel space is transmitted, the longer the width of the barrier ribs is, the smaller the pixel space region is and the light emitted from each pixel is obtained. The aperture ratio of is decreased, and the smaller the width of the partition wall is, the greater the amount of light is emitted and the aperture ratio is increased. Therefore, in order to increase the adhesion between the substrate and the partition wall, it is not possible to increase the width length of the partition wall indefinitely. Therefore, there is a limit to increase the adhesive force and the aperture ratio of the substrate and the barrier rib at the same time only with the grid-shaped barrier rib structure having the rectangular pixel space.

In summary, in the electronic paper display device, the barrier rib structure must have an adhesion force according to a predetermined width for lamination with the upper and lower plates, and in order to do so, the barrier rib needs an adhesive region capable of having a constant adhesion force. In addition, since the electronic paper display device displays various images by transmission of light emitted from each pixel space including a substrate, an electrode, and a partition wall, the aperture ratio at which light is emitted from each pixel space must also be high to fix the electronic paper display device. Fine arts are possible. That is, in the electronic paper display device, the partition wall for dividing the pixel space has an adhesion force according to a certain width length for lamination with the upper and lower plates, and a partition shape having excellent aperture ratio and excellent aperture ratio is also urgently required for high definition of image quality. to be.

The present invention has been made in order to solve the above problems, there is a separate bonding region formed by the intersection of the transverse bulkhead and the vertical bulkhead, the width of the adhesive region is wider than the width of each of the horizontal bulkhead and vertical bulkhead. An object of the present invention is to provide an electronic paper display device. That is, the present invention is to widen the width of the adhesive region formed by the intersection of the horizontal partition and the vertical partition by changing the shape of the pixel space formed by the horizontal and vertical partitions.

According to the present invention, it is difficult to dispense the adhesive because the width of the partition wall is too narrow in the conventional electronic paper display device, and the adhesive force between the substrate and the partition wall is weak due to the width of the narrow partition wall. That is, according to the present invention, by forming a separate adhesive region by the intersection of the horizontal bulkhead and the vertical bulkhead, and by varying the shape of the pixel space to widen the width of the adhesive area, the adhesion between the substrate and the partition wall can be effectively bonded. It is to be secured. In addition, it is an object of the present invention to provide an electronic paper display device in which the widths of the horizontal and vertical barrier ribs forming the pixel space are kept constant, thereby increasing the adhesion between the substrate and the barrier ribs and not decreasing the aperture ratio of the pixel space. .

The present invention relates to an electronic paper display device having a wide adhesive region, and specifically, a lower substrate and an upper substrate disposed to face each other at a predetermined interval; A lower electrode and an upper electrode inscribed on the substrate, respectively; A horizontal partition wall and a vertical partition wall forming a pixel space by dividing pixels between the lower electrode and the upper electrode; And a plurality of charged particles encapsulated in the pixel space, wherein an adhesive region is formed by the intersection of the horizontal barrier ribs and the vertical barrier ribs, and a width of each of the adhesive barriers is formed in each of the horizontal barrier ribs and the vertical barrier ribs. An electronic paper display device having a wide width of an adhesive region formed wider than its width is provided.

Here, the pixel space formed by the horizontal bulkhead and the vertical bulkhead preferably has a polygonal structure of five or more shapes, and the polygonal structure of the pixel space has an octagonal structure, and is formed by the intersection of the horizontal bulkhead and the vertical bulkhead. More preferably, the adhesive region has a rectangular shape. The rectangular adhesive region may be characterized in that the length of one side has a size within a range of 5 μm to 50 μm.

In the present invention, the intersection of the horizontal bulkhead and the vertical bulkhead forming the adhesive region is preferable in terms of the efficiency of using the same bulkhead material to cross vertically, and such vertical crossover may be different depending on the direction of the bulkhead. .

Another embodiment of the present invention is formed by the horizontal bulkhead and the vertical bulkhead. The pixel space having a polygonal structure of five or more polygons has horizontal cell lines arranged horizontally, and the first horizontal cell line and the second horizontal cell line. The polygonal structure of the pixel space of the present invention is also possible for the electronic paper display device having a wide range of adhesive regions, which are arranged side by side vertically.

In addition, when the polygonal structure is a pentagonal polygonal structure or a polygonal structure of more than seven hexagons, the polygonal structure of the pixel space in the first horizontal cell line and the second horizontal cell line may be alternately positioned vertically. Further, when the polygonal structure is a polygonal structure of 2n + 3 (n = odd) or more, the polygonal structures of the pixel spaces in the first horizontal cell line and the second horizontal cell line may be opposite to each other.

The present invention is characterized in that the width of the horizontal bulkhead and the vertical bulkhead is smaller than the width of the adhesive region formed by the intersection of the horizontal bulkhead and the vertical bulkhead, another embodiment of the present invention is the horizontal bulkhead and the vertical bulkhead It is also possible for the pixel space formed by the to have a circular structure.

In the present invention as described above, the inner surface of the lower electrode and the upper electrode may be an electronic paper display device having a wide adhesive region, characterized in that the adhesive layer further comprises. In addition, the horizontal partition wall and the vertical partition wall is preferably made of a flexible material containing a polymer resin, the polymer is polycarbonate (PC), polyethylene terephthalate (PET), polyether sulfone (PES) and polyimide film More preferably at least one selected from the group consisting of.

The thickness of the horizontal and vertical barrier ribs may vary depending on the adhesive strength and the opening ratio of the upper and lower substrates, and may be in a range of 10 μm to 500 μm. In addition, the barrier rib may be formed by a photolithography method using a photoresist, a method using a photosensitive polymer, and a laminating method using a cut material made in advance.

Thus, the present invention is intended for an electronic paper display device having a barrier rib structure, which is not applicable to wet electronic paper using a microcapsule without a barrier rib, and may be applied to an electronic paper having a barrier rib structure even in wet electronic paper. The electronic paper display device according to the present invention is suitable for a dry collision type charged electronic paper display device, characterized in that the charged particles are charged or charged dry particles by collision.

Hereinafter, one preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. The invention can be better understood by the following examples, which are intended for the purpose of illustration of the invention and are not intended to limit the scope of protection defined by the appended claims.

5 is a perspective view illustrating a substrate and an electrode structure of an electronic paper display device according to an exemplary embodiment of the present invention, and FIGS. 6 to 14 illustrate a polygonal partition structure of the electronic paper display device according to an exemplary embodiment of the present invention. It is a top view showing. Here, reference numeral 1 denotes a lower substrate, 2 a lower electrode, 3 a lower insulating layer, 4 a partition, 5 a pixel space, 6 an upper substrate, 7 an upper electrode, 8 an upper insulating layer, and 9 a particle. it means.

First, as shown in FIG. 5, a transparent lower electrode 2 and a lower insulating layer 3 are sequentially formed on the lower substrate 1, and an upper electrode and an upper insulating layer are formed below the upper substrate (not shown). do. In the present invention, the forming of the upper electrode and the upper insulating layer on the upper substrate is the same as the method of forming the lower electrode 2 and the lower insulating layer 3 on the lower substrate 1, so that the lower substrate 1 This description replaces the description of the upper substrate.

The basic electrode structure of the electronic paper display element is preferably a matrix structure, and thus the lower electrode 2 has a shape as shown in the right side of FIG. 5. The transparent lower electrode 2 is preferably ITO, and there is no problem in driving even if the lower insulating layer 3 applied thereon is omitted. Is preferably applied since it can be difficult to preserve the image for a long time without applying new power.

Then, the horizontal partition wall 4a and the vertical partition wall 4b are formed to divide the pixel between the lower electrode 2 and the upper electrode to form the pixel space 5. In the electronic paper display device according to the present invention, the pixel space 5 formed by the horizontal barrier ribs 4a and the vertical barrier ribs 4b has a different shape, so that the electronic paper display device can cross the horizontal barrier ribs 4a and the vertical barrier ribs 4b. It is characterized in that for widening the width of the bonding region (4c) formed by the present invention, as shown in Figure 6 by the intersection of the horizontal partition wall (4a) and the vertical partition wall (4b) as shown in Figure 6 Is formed, and the width of the adhesive region 4c relates to a partition structure formed wider than the width of each of the horizontal partition walls 4a and the vertical partition walls 4b.

6 illustrates that the shape of the pixel space 5 is an octagonal shape, the present invention is not limited thereto, and any barrier rib structure in which the pixel space 5 having a polygonal shape of five or more polygons is formed is preferable. Although it may correspond to an embodiment, even if it has a polygonal structure of 5 or less squares, the contact | attachment area | region 4c formed by the intersection of the horizontal partition 4a and the vertical partition 4b exists separately, and the said contact | attachment area 4c ) Is wider than the width of each of the transverse bulkheads 4a and the vertical bulkheads 4b, and may be included in the scope of the present invention.

Since the conventional electronic paper partition structure is a grid-shaped partition structure having a rectangular pixel space (see FIG. 4), the horizontal partition walls and the vertical partition walls have the same width, and thus the width of the area where these partition walls intersect. It was also common to be equal to the width of the partition walls in the horizontal and vertical directions. However, in the lattice-shaped barrier rib structure having a rectangular pixel space, the barrier ribs are too narrow in width and the area where the barrier ribs intersect is too small to dispense an adhesive for bonding the substrate and the barrier ribs. There were many difficulties. In addition, even if the adhesive is successfully dispensed in the intersection region of the narrow barrier rib and the small width, there is a problem that it is difficult to expect sufficient adhesive strength so that the substrate and the barrier rib does not easily fall due to the narrow barrier rib width.

Therefore, the present inventors have regarded the conventional lattice-shaped partition wall structure by the intersection of the horizontal partition wall 4a and the vertical partition wall 4b, and the separate adhesive region formed by the intersection of the horizontal partition wall 4a and the vertical partition wall 4b ( 4c), a barrier rib structure having a width larger than that of each of the horizontal barrier ribs 4a and the vertical barrier ribs 4b is proposed. When the horizontal bulkhead and the vertical bulkhead are simply crossed as in the related art, the intersecting portion also has the same size as the width of the horizontal bulkhead and the vertical bulkhead. However, in the present invention, the substrate and the partition wall can be effectively joined by the adhesive region 4c having a width wider than that of each of the horizontal partition walls 4a and the vertical partition walls 4b as described above. That is, in the conventional structure in which the partition wall having a constant width intersects, the width of the cross section is also narrow, and thus the adhesion to the substrate is considerably weak. However, according to the present invention, the structure has a width wider than that of the horizontal partition 4a and the vertical partition 4b. Through the separate bonding region 4c, it is possible to have excellent adhesion to the substrate and the partition wall of the flexible electronic paper.

According to another aspect of the present invention, the pixel space 5 formed by the horizontal barrier rib 4a and the vertical barrier rib 4b has a polygonal structure of five or more pentagons. Of course, even with the pixel space 5 having a triangular or quadrangular shape, by varying the arrangement or arrangement of the pixel space 5, the shape is wider than the width of the horizontal partition 4a and the vertical partition 4b. As described above, an electronic paper display device having an adhesive region of? Can also be manufactured.

Nevertheless, the triangular or tetragonal shape itself has a simple structure, which may be simple to manufacture, but it has limitations in various arrangements and transformations of pixel space, and has a disadvantage in that the use efficiency is low due to the large amount of space. . Therefore, a partition wall having a triangular or quadrangular pixel space is extremely limited in order to form an adhesive region wider than the width of the partition wall. Therefore, in the electronic paper display device according to the present invention, it is preferable to use the pixel space 5 having a polygonal structure of five or more shapes.

The present invention having a polygonal structure of five or more polygons may vary depending on the shape of the pixel space 5 which is influenced by the partition structure, or may be variously implemented by the arrangement of the pixel space 5 formed by the partition wall 4. Form is possible. That is, the present invention may be implemented by changing the shape of the pixel space 5 formed by the horizontal partition 4a and the vertical partition 4b into a polygon of 5 or more hexagons, or the pixel space 5 of the polygon. There may be a myriad of cases depending on how to vertically alternately position or arrange the shape of the pixel space 5 in the first horizontal cell line and the second horizontal cell line in the arranged horizontal cell lines.

A preferred embodiment of the present invention in which the pixel space 5 formed by the horizontal barrier ribs 4a and the vertical barrier ribs 4b has a polygonal or larger polygonal structure will be described in detail below with reference to specific embodiments and drawings. do. In particular, the present invention is characterized in that the polygonal structure of the pixel space 5 is an octagonal structure, and the adhesive region 4c formed by the intersection of the horizontal partition 4a and the vertical partition 4b has a rectangular shape. The most preferred embodiment of the present invention is to describe the partition wall 4 in which the pixel space 5 has an octagonal structure.

Partition walls having an octagonal structure of pixel space are as shown in FIGS. 6 and 7. That is, in the horizontal partition 4a and the vertical partition 4b forming the pixel space 5 by dividing pixels between the lower electrode 2 and the upper electrode, the horizontal partition 4a and the vertical partition 4b. The pixel space 5 formed by the octagonal structure has an octagonal structure, and thus the adhesive region 4c formed by the intersection of the horizontal partition 4a and the vertical partition 4b is formed at each side of the octagonal structure. By having a square shape.

In other words, in the present invention, as shown in FIG. 6, the polygonal structure formed by the pixel space 5 is octagonal, and the pixel space 5 having the polygonal structure has horizontal cell lines arranged horizontally. The octagonal structure of the pixel space 5 in the first horizontal cell line and the main horizontal cell line may be said to be arranged side by side vertically.

According to the present invention, the pixel space 5 formed by the horizontal partition 4a and the vertical partition 4b has an octagonal structure, and is formed by the intersection of the horizontal partition 4a and the vertical partition 4b. When the adhesive region 4c is formed in a rectangular shape, a sufficient adhesive space having a rectangular shape having an area larger than the widths of the horizontal bulkheads 4a and the vertical bulkheads 4b can be secured separately. In order to bond the substrates 1 and 6 and the barrier rib 4 of the electronic paper display element, a technique of dispensing an adhesive on the barrier rib 4 is required. Even if such a dispensing technique is developed, sufficient adhesion space on the barrier rib is ensured. This is necessary. Therefore, according to the present invention, if the partitions located between the four octagonal pixel spaces 5 and the rectangular space formed by the intersection of the partitions have a good bonding effect, the panel which is difficult to attach to the upper and lower plates like the flexible display is excellent. You can do it. Further, the rectangular adhesive region 4c may be positioned with a driving unit such as a TFT to help improve the aperture ratio.

As described above, the polygonal structure formed by the pixel space 5 is an octagonal structure, and the bonding region 4c formed by the intersection of the horizontal partition 4a and the vertical partition 4b has a rectangular shape. The invention may have an embodiment as shown in FIG. 7. In FIG. 7, the pixel space 5 has an octagonal structure, and the adhesive region 4c formed by the intersection of the partition walls has a rectangular shape, and the width of the adhesive region 4c is the horizontal partition wall ( It is formed wider than the width of each of 4a) and the vertical partition 4b. When the embodiment shown in FIG. 7 is compared with the embodiment shown in FIG. 6, the horizontal bulkheads 4a and the vertical bulkheads 4b are not extended in the horizontal direction and the vertical direction, but based on the vertex inclined at about 45 degrees from the horizontal. As a result, the partition is formed by the horizontal partition 4a and the vertical partition 4b.

In other words, according to the present invention, as shown in FIG. 7, the polygonal structure formed by the pixel space 5 is octagonal, and the pixel space 5 having the polygonal structure has horizontal cell lines arranged horizontally. For example, the octagonal structure of the pixel space 5 in the first horizontal cell line and the main horizontal cell line may be alternately arranged vertically.

The embodiment shown in FIG. 6 and the embodiment shown in FIG. 7 differ only by the reference point defining the horizontal direction and the vertical direction, and are defined by the horizontal partition wall 4a and the vertical partition wall 4b as in the perspective view shown in FIG. 8. The pixel space 5 to be formed has an octagonal structure, and the adhesive region 4c formed by the intersection of the partition walls has a quadrangular shape, and the width of the adhesive region 4c is the horizontal partition wall ( The technical features that are formed wider than the width of each of the 4a) and the vertical bulkhead 4b are the same.

In addition, it is more preferable that the rectangular adhesive region 4c formed as described above has a length of one side in a range of 5 μm to 50 μm. When the length of one side is 5 μm or less, the width of the barrier is similar to that of the conventional barrier rib structure, and thus, the effect of improving adhesion is insufficient. When the length of the side is 50 μm or more, the aperture ratio of the pixel space 5 is excessively inhibited. This has the disadvantage of falling pixels. In addition, in the present invention, it is preferable that the intersection of the horizontal bulkhead 4a and the vertical bulkhead 4b intersect vertically in terms of utilization efficiency, and such vertical crossover is shown in FIGS. 6 and 7. It may appear differently depending on the direction.

Next, another embodiment of the present invention in which the pixel space 5 formed by the horizontal partition 4a and the vertical partition 4b has a pentagonal structure will be described. 9 and 10 are plan views illustrating a pentagon partition wall structure of an electronic paper display device according to an exemplary embodiment of the present invention.

9 and 10, in the present invention, the pixel space 5 formed by the intersection of the horizontal partition 4a and the vertical partition 4b has a polygonal polygonal structure, and the horizontal partition 4a is formed. The adhesive region 4c is formed by the intersection of the vertical barrier rib 4b and the width of the adhesive region 4c includes a shape formed wider than the width of each of the horizontal barrier rib 4a and the vertical barrier rib 4b. .

That is, as shown in FIG. 9, when the pixel space 5 having a pentagonal structure is arranged side by side horizontally, and such an arrangement is composed of a plurality of lines, a wider width than the partition wall is formed between the pixel spaces 5. The bonding area | region 4c which has a branch is formed, and this invention is characterized by the bonding area | region 4c which has such a wide width, and aims at the adhesive force of a board | substrate and a partition. In the present invention as shown in FIG. 9, the polygonal structure formed by the pixel space 5 is pentagonal, and the pixel space 5 having the polygonal structure has horizontal cell lines arranged horizontally, and the first horizontal cell line. The pentagonal structure of the pixel space 5 in the and second horizontal cell lines may be said to be arranged side by side vertically.

Although not illustrated for the pentagonal structure, a form in which the pentagonal structures of the pixel spaces 5 in the first horizontal cell line and the second horizontal cell line are alternately positioned vertically is also more than the partition wall between the pixel spaces 5. The adhesive region 4c having a wide width can be formed, and the present invention increases the adhesive force between the substrate and the partition wall by using the adhesive region 4c.

In addition, the present invention, as shown in Figure 10, arranged the pixel space (5) having a pentagonal structure in parallel side by side, such an arrangement consisting of a plurality of lines, the pixel space (5) along the line Even when the top and bottom sides are reversed, an adhesive region 4c having a width wider than the partition wall is formed between the pixel spaces 5. According to the present invention as shown in FIG. 10, the polygonal structure formed by the pixel space 5 is pentagonal, and the pixel space 5 having the polygonal structure has horizontal cell lines arranged horizontally, and the first horizontal cell line It can be said that the polygonal structure of the pixel space 5 in the and second horizontal cell lines is opposite to each other.

According to the present invention as described above, when the pixel space 5 is pentagonal, the horizontal bulkhead 4a and the vertical bulkhead 4b may be crossed in any form. That is, the horizontal bulkhead 4a and the vertical bulkhead 4b may be formed so as not to vertically intersect, and the polygonal structure of the pixel space 5 in the horizontal cell line is arranged vertically side by side or alternately positioned. It is also possible.

However, when the pixel space 5 formed by the horizontal bulkhead 4a and the vertical bulkhead 4b has a hexagonal structure, there is a limitation in one case. Hereinafter, the pixel space ( The case where 5) is a hexagonal structure will be described. 11 and 12 are plan views illustrating a hexagonal partition structure of an electronic paper display device for explaining the present invention and a hexagonal partition structure according to an exemplary embodiment of the present invention.

11 and 12, in the present invention, the pixel space 5 formed by the intersection of the horizontal partition 4a and the vertical partition 4b has a hexagonal polygonal structure, and the horizontal partition 4a is formed. The adhesive region 4c is formed by the intersection of the vertical barrier rib 4b and the width of the adhesive region 4c includes a shape formed wider than the width of each of the horizontal barrier rib 4a and the vertical barrier rib 4b. .

However, in the case where the pixel space 5 is essentially hexagonal, the pixel space 5 has horizontal cell lines arranged horizontally, and the pixel space 5 of the pixel space 5 in the first horizontal cell line and the second horizontal cell line is arranged. The case where the polygonal structures are arranged side by side vertically belongs to the present invention, but the case where the polygonal structures of the pixel space 5 are alternately positioned vertically does not fall within the preferred scope of the present invention. In other words, the width of the adhesive region 4c formed by the intersection of the horizontal partition wall 4a and the vertical partition wall 4b is equal to the width of each of the horizontal partition wall 4a and the vertical partition wall 4b.

When the pixel space 5 formed by the horizontal barrier rib 4a and the vertical barrier rib 4b intersects with respect to one point, each pixel does not have symmetry between the pixel spaces 5 at the intersection point. The sum of the angles of the spaces 5 should not be 360 degrees. That is, when several pixel spaces 5 meet at one reference point and are symmetrical with each other, each of the two pixel spaces 5 has 180 degrees. The inner angle of each of the three pixel spaces 5 has 120 degrees, the inner angle of each of the four pixel spaces 5 has 90 degrees, or the inner angle of each of the five pixel spaces 5 has 72 degrees, The size of the cabinet is decreased in the order in which the cabinet of each of the six pixel spaces 5 should have 60 degrees.

Here, the polygon structure constituting the pixel space 5 will be described. If the pixel space 5 is triangular, the size of the internal angle is 60 degrees; if the pixel space 5 is a quadrilateral, the size of the internal angle is 90 degrees; if the pixel space 5 is pentagon, the size of the internal angle is 108 degrees. If the pixel space 5 is hexagonal, the size of the internal angle is 120 degrees. If the pixel space 5 is seventh, the size of the internal angle is 128.57 degrees. If the pixel space 5 is octagonal, the size of the internal angle is 138 degrees. Gradually the size of the cabinet increases.

Therefore, considering the case where the pixel space 5 is a hexagon, the size of the cabinet is 120 degrees, which corresponds to a case where several pixel spaces 5 meet at one reference point and are symmetric with each other, as shown in FIG. In the case where the polygonal structures of the pixel spaces 5 in the first horizontal cell line and the second horizontal cell line are alternately positioned vertically, the adhesive region 4c formed by the intersection of the horizontal partition wall 4a and the vertical partition wall 4b. Is equal to the width of each of the transverse bulkhead 4a and the vertical bulkhead 4b.

In contrast, even if the pixel space 5 is hexagonal, as in FIG. 12, the pixel space 5 includes horizontal cell lines arranged horizontally, and pixel spaces 5 in the first horizontal cell line and the second horizontal cell line. In the case where the polygonal structures of () are vertically arranged side by side, the width of the adhesive region 4c formed by the intersection of the horizontal partition wall 4a and the vertical partition wall 4b is greater than the horizontal partition wall 4a and the vertical partition wall 4b. Since it is wider than each width | variety, the characteristic of this invention is shown.

In addition, compared with the case where the pixel space 5 is a pentagon, when the pixel space 5 is a hexagon, that is, the polygonal structure of the pixel space 5 does not correspond to 2n + 3 (n = odd) In this case, since the polygonal structures of the pixel spaces 5 are symmetrical with each other, the upper and lower positions of the polygonal structures are not distinguished from each other, and thus the upper and lower positions of the polygonal structures in different horizontal cell lines have no meaning.

Next, a case in which the pixel space 5 formed by the horizontal barrier rib 4a and the vertical barrier rib 4b has a hexagonal structure will be described with reference to FIG. 13. FIG. 13 is a plan view illustrating a hexagonal partition structure of an electronic paper display device according to an exemplary embodiment of the present invention. FIG.

As shown here, in the present invention, the pixel space 5 formed by the intersection of the horizontal partition 4a and the vertical partition 4b has a polygonal polygonal structure, and the horizontal partition 4a and the vertical partition ( An adhesion region 4c is formed by the intersection of 4b), and the width of the adhesion region 4c includes a shape formed wider than the width of each of the horizontal partition 4a and the vertical partition 4b.

When the pixel space 5 is a hexagon, the size of the cabinet is 128.57 degrees, and even though several pixel spaces 5 meet at one reference point and are symmetrical with each other, the angles of each of the two pixel spaces 5 are 180 degrees. Since the angles of the interior angles gradually increase as the number of the pixel spaces 5 increases, for example, each of the three pixel spaces 5 must have 120 degrees, and thus the pixel spaces 5 have a hexagonal shape. There is no limitation as in the hexagon.

That is, when the pixel space 5 is a hexagon, the pixel space 5 having a polygonal structure has horizontal cell lines arranged horizontally, and the pixel space 5 of the pixel space 5 in the first horizontal cell line and the second horizontal cell line is arranged. The polygonal structure may be alternately positioned vertically, or may be arranged side by side vertically. In addition, since the polygonal structures of the pixel space 5 are not symmetrical with each other because they are hexagonal, even in the case where the upper and lower positions of the pixel space 5 are opposite to each other, a wide bonding area 4c can be secured according to the present invention. Can be.

The same applies to the case where the pixel space 5 formed by the horizontal partition 4a and the vertical partition 4b has an octagonal structure or more. That is, when the pixel space 5 has an even shape of an octagon or more, as in the hexagonal structure described above, the polygonal structures of the pixel space 5 in the first horizontal cell line and the second horizontal cell line are perpendicular to each other. Alternating positions do not fall within the preferred scope of the present invention. When the pixel space 5 has an odd-octagonal structure, as in the pentagonal structure described above, the horizontal partition 4a and the vertical partition 4b may intersect in any form and are horizontal. The polygonal structure of the pixel space 5 in the cell line may be arranged vertically side by side or alternately positioned. Even if the top and bottom positions of the pixel space 5 are opposite to each other, the polygonal structure is wide according to the present invention. The bonding area 4c can be secured.

In addition, according to another embodiment of the present invention, the pixel space 5 formed by the horizontal barrier rib 4a and the vertical barrier rib 4b has a circular structure as shown in FIG. 14 is a plan view illustrating a circular partition wall structure of an electronic paper display device according to an exemplary embodiment of the present invention.

Here, as shown in the present invention, even when the pixel space 5 formed by the horizontal partition 4a and the vertical partition 4b is circular, the intersection of the horizontal partition 4a and the vertical partition 4b is performed. The adhesive region 4c is formed by the adhesive region 4c, and the width of the adhesive region 4c has a structure of the partition wall 4 formed wider than the width of each of the horizontal partition wall 4a and the vertical partition wall 4b.

As described above, in the embodiment in which the pixel space 5 has a circular structure, the width of the adhesive region 4c formed by the circular structure is larger than that in the case where the pixel space 5 has a polygonal structure. Since the bonding regions 4c are organically connected to each other, there is an effect that the adhesion between the substrate and the partition wall 4 can be further improved.

On the other hand, since the partition wall 4 according to the present invention is used to distinguish the cell unit, the material may be variously applied to a polymer, an inorganic material, and the like. In the present invention, a method for forming the partition 4 is preferably a photolithography method using a photoresist, a method using a photosensitive polymer, a laminating method using a pre-made material, and the like. It can be applied on the bottom plate formed in advance by ultraviolet irradiation or the like.

In the present invention, the paste for the partition wall 4 contains at least an inorganic powder and a resin, and other solvents, additives and the like. The said inorganic powder is ceramic powder or glass powder, It can be used 1 type or in combination of 2 or more types, The resin contained in the said partition wall paste can contain the above-mentioned inorganic powder, and forms a predetermined partition shape. Although thermoplastic resin, thermosetting resin, and reactive resin which can be mentioned are mentioned, it is common that the molecular weight is large and the glass transition point (Tg) is as high as possible in consideration of required partition physical properties. For example, a flexible material selected from at least one selected from the group consisting of polycarbonate (PC), polyethylene terephthalate (PET), polyethersulfone (PES), and polyimide film, and particularly acrylic, epoxy, urethane, etc. And polyester type are preferable.

The shape of the partition wall 4 according to the present invention is appropriately optimally set according to the size of the pixels for display, and is not limited uniformly. However, the thickness of the partition wall 4 is considered in consideration of the required adhesive strength of the upper and lower plates. It is advantageous to make the area as large as possible. However, there is a disadvantage in that the opening ratio is lowered according to the contact area, so the upper thickness of the partition 4 is preferably in the range of about 10 μm to 500 μm.

The present invention is characterized in that in the electronic paper display device, the adhesive region 4c is formed by the intersection of the horizontal partition wall 4a and the vertical partition wall 4b, and thus all electronic paper display elements having the structure of the partition wall 4 are provided. There is no room for the application of electronic paper using microcapsules contained in the electrolyte fluid without partitions. However, the application of the wet type electronic paper using the microcapsule is not limited to all, and even the wet type electronic paper may be applied to the electronic paper having the partition 4 structure, and the electronic paper display device according to the present invention may be charged. It is preferable to apply the collision-charged electronic paper of the dry method in which the particles move by electrophoresis to the display device.

Finally, charged particles (not shown) are injected into the electronic paper display device according to the present invention in which the partition wall 4 is formed according to the above-described method, and as shown in FIG. 15, the upper part of the partition wall 4 is not formed. The board | substrate 6 is laminated | stacked on the upper surface of the said partition 4, and is bonded. FIG. 15 is a schematic diagram illustrating a state in which the partition walls 4 of the electronic paper display device according to the exemplary embodiment of the present invention are attached to the substrates 1 and 6 and the electrodes 2 and 7.

As shown here, the upper plate of the electronic paper display device according to the present invention is formed by forming a transparent upper electrode 7 and an upper insulating layer 8 on the upper substrate 6, the lower plate is a lower substrate (1) The lower electrode 2 and the lower insulating layer 3 are formed on the substrate. In addition, the lower electrode 3 and the upper electrode 7 according to the present invention should be arranged so as to vertically cross each other to apply a driving voltage to the scan electrode and the data electrode, wherein the upper and lower insulating layers 8 Although 3) is omitted, there is no problem in driving, but it is preferably selected to reduce the movement of the charged particles attached to the electrode.

16 illustrates an electronic paper display device having a wide width of an adhesive region of the present invention formed according to the above-described manufacturing method, and FIG. 16 is a cross-sectional view illustrating a cell structure of an electronic paper display device according to an exemplary embodiment of the present invention. to be.

In the case where the injected electrophoretic charged particles 9 are collision charged electrophoretic particles 9, the particles 9 are generally injected into the pixel space without being charged. Therefore, after the bonding of the upper substrate 6, a voltage is applied to the upper electrode 7 and the lower electrode 3 so that the electrophoretic particles 9 collide with each other, thereby making the charge due to the collision. As shown in FIG. 10, an electronic paper display device having a wide range of adhesive regions according to the present invention is completed. In addition, although not shown, a color filter may be provided on the top plate to implement red, green, and blue colors for each pixel, and a desired color may be obtained by filtering light transmitted from the charged particles.

In the foregoing description, it should be understood that those skilled in the present invention can only make modifications and changes to the present invention without changing the gist of the present invention as it merely illustrates one preferred embodiment of the present invention.

According to the present invention as described above, the lower substrate and the upper substrate which are arranged facing at a predetermined interval; A lower electrode and an upper electrode inscribed on the substrate, respectively; A horizontal partition wall and a vertical partition wall forming a pixel space by dividing pixels between the lower electrode and the upper electrode; And a plurality of charged particles encapsulated in the pixel space, wherein an adhesive region is formed by the intersection of the horizontal barrier ribs and the vertical barrier ribs, and a width of each of the adhesive barriers is formed in each of the horizontal barrier ribs and the vertical barrier ribs. It is possible to provide an electronic paper display device having a wide width of the adhesive region formed wider than the width.

According to the present invention, it is possible to solve the problem that in the conventional electronic paper display device, the width of the partition wall is too narrow to dispense the adhesive, and the adhesive force between the substrate and the partition wall is weak due to the width of the narrow partition wall. That is, according to the present invention, by forming a separate adhesive region by the intersection of the horizontal bulkhead and the vertical bulkhead, and by varying the shape of the pixel space to widen the width of the adhesive area, the adhesion between the substrate and the partition wall can be effectively bonded. It can be secured. In addition, it is possible to provide an electronic paper display device in which the widths of the horizontal partition walls and the vertical partition walls forming the pixel space are kept constant, thereby increasing the adhesive force between the substrate and the partition walls while not decreasing the aperture ratio of the pixel space.

Claims (15)

A lower substrate and an upper substrate disposed to face each other at a predetermined interval; A lower electrode and an upper electrode inscribed on the substrate, respectively; A horizontal partition wall and a vertical partition wall forming a pixel space by dividing pixels between the lower electrode and the upper electrode; And To include a plurality of charged particles encapsulated in the pixel space, An adhesive region is formed by the intersection of the horizontal bulkhead and the vertical bulkhead, and the width of the adhesive area is wider than the width of each of the horizontal bulkhead and the vertical bulkhead. The electronic paper display device of claim 1, wherein the pixel space formed by the horizontal barrier ribs and the vertical barrier ribs has a polygonal structure of five or more pentagons. The electronic paper display device of claim 2, wherein the polygonal structure has an octagonal structure, and the adhesive region formed by the intersection of the horizontal and vertical barrier ribs has a rectangular shape. The electronic paper display device of claim 3, wherein the rectangular adhesive region has a length of one side in a range of 5 μm to 50 μm. The electronic paper display device of claim 1, wherein an intersection of the horizontal partition wall and the vertical partition wall forming the adhesive area vertically intersects. The pixel space having the polygonal structure has horizontal cell lines arranged horizontally, and the polygonal structures of the pixel spaces in the first horizontal cell line and the second horizontal cell line are vertically arranged side by side. An electronic paper display device having a wide range of adhesive regions. 3. The polygonal structure of claim 2, wherein the polygonal structure is a pentagonal polygonal structure or a polygonal structure of seven or more polygons, and the pixel space having the polygonal structure has horizontal cell lines arranged horizontally, the first horizontal cell line and the second horizontal cell line. The electronic paper display device of a wide adhesive region, characterized in that the polygonal structure of the pixel space are alternately positioned vertically. 3. The polygonal structure of claim 2, wherein the polygonal structure is a polygonal structure of 2n + 3 (n = odd) polygons or more, and the pixel space having the polygonal structure has horizontal cell lines arranged horizontally, the first horizontal cell line and the second horizontal cell. The polygonal structure of the pixel space in the line is a wide electronic region of the adhesive region, characterized in that the vertical position is opposite to each other. The electronic paper display device of claim 1, wherein the pixel space formed by the horizontal barrier ribs and the vertical barrier ribs has a circular structure. The electronic paper display device according to any one of claims 1 to 9, wherein an insulating layer is further included on inner surfaces of the lower electrode and the upper electrode. The electronic paper display device according to any one of claims 1 to 9, wherein the horizontal partition walls and the vertical partition walls are made of a flexible material including a polymer resin. The method of claim 11, wherein the polymer is at least one selected from the group consisting of polycarbonate (PC), polyethylene terephthalate (PET), polyether sulfone (PES) and polyimide film is a width of the adhesive region is Wide electronic paper display element. 10. The width of the adhesive region of claim 1, wherein the thickness of the horizontal barrier ribs and the vertical barrier ribs is in a range of 10 μm to 500 μm, depending on the adhesion strength and the opening ratio of the upper and lower substrates. Wide electronic paper display element. 10. An adhesive area according to any one of claims 1 to 9, wherein the partition wall is formed by a photolithography method using a photoresist, a method using a photosensitive polymer, and a laminating method using a cut of a pre-made material. Wide electronic paper display device. 10. The electronic paper display device according to any one of claims 1 to 9, wherein the charged particles are made of dry particles that are charged or charged by collision.

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