KR20070008068A - Electronic paper display device using collision electrification - Google Patents

Abstract

A collision electrification type electronic paper display is provided to improve the white degree when black characters or black pictures are displayed on a white background, by forming barrier walls using white color. Upper and lower substrates(6,1) face each other, wherein at least one of the upper and lower substrates is transparent. Upper and lower electrodes(7,2) for application of driving voltage are respectively formed on the upper and lower substrates. The upper and lower electrodes are formed of ITO(Indium Tin Oxide). Black and white electrification particles(9) are disposed between the upper and lower electrodes. Barrier walls(4) are disposed between the upper and lower substrates, thereby defining a plurality of cells. The barrier walls are formed using white color.

Description

Electronic Paper Display Device Using Collision Electrification

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

2 is a cross-sectional view illustrating a black partition wall structure of a light emitting display device according to the related art.

3 is a plan view illustrating a structure in which a color filter of a light emitting display device according to the related art is surrounded by a black matrix,

4 is a cross-sectional view and a perspective view showing a substrate and a lower electrode structure of a collision charged electronic paper display device according to the present invention;

5 is a cross-sectional view and a perspective view showing a white bulkhead structure of the collision-chargeable electronic paper display device according to the present invention;

6 is a structural cross-sectional view and a perspective view showing that the upper end of the partition wall of the collision-chargeable electronic paper display device according to the present invention is white,

7 is a schematic diagram showing a state in which white partitions are formed on the substrate and the electrode of the collision-chargeable electronic paper display device according to the present invention;

8 is a cross-sectional view illustrating a state in which white partitions are formed on a substrate and an electrode of an collision-chargeable electronic paper display device according to the present invention;

FIG. 9 is a plan view illustrating a structure in which a color filter installed on an effective surface of a collision charged electronic paper display device according to the present invention is surrounded by a white matrix.

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

1: lower substrate 2: lower electrode

3: lower insulation layer 4: white bulkhead

5: black bulkhead 6: upper substrate

7: upper electrode 8: upper insulating layer

9: charged particle 10: color filter

11: white matrix

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a collision-chargeable electronic paper display device in which the matrix of the partition or color filter is white, wherein a matrix surrounding the partition or color filter separating the cell from the upper and lower substrates, The collision charging type electronic paper display device whose upper part is white.

Electrophoretic Display device is a flat panel display using electrophoresis, which has excellent reflectivity, flexibility, portability, and other light characteristics without the need of an external light source. Display).

The electrophoretic display device is a reflective display which drives an electrophoretic suspension by coating a transparent conductive film on a thin, bendable base film such as paper or plastic, and is a liquid crystal display device, a plasma display panel, an organic display device. The device is expected to be in the spotlight as the next-generation electronic paper that follows the electroluminescent device. In particular, electronic paper is a flexible substrate such as a thin plastic with millions of beads scattered in an oil hole, and a display element that can display text or images. It can be reproduced millions of times and used in the future in books, newspapers, magazines, etc. It is expected to be a material to replace the existing print media.

Electronic paper displays are the core of flexible (or paper) display implementations, and are based on electrophoresis, which applies electromagnetic fields to conductive materials to make them moveable. After the conductive particles are distributed, the data are represented by a change in the arrangement of the particles due to a change in polarity of the electromagnetic field.

1 is a cross-sectional view showing a cell structure of a collision-charged electronic paper display device according to the prior art. As shown, the structure includes upper and lower substrates 70 and 10 formed of either plastic or glass, and upper and lower substrates formed of transparent electrodes ITO to apply driving voltages of devices on the upper and lower substrates. Electrodes 80 and 20, upper and lower insulating layers 90 and 30 selectively coated on the upper and lower electrodes, partition walls 40 separating the cells from the cells, and white between the two electrodes. It consists of positive (+) charged particles 50 and black negative (-) charged particles (60).

Although the thickness of the lower substrate and the upper substrate is not limited, it should be noted that since the black and white charged particles 50 and 60 must be moved by the electrostatic force, the actual thickness of the partition wall 40 or the size of the charged particles is very small. In addition, the thickness of the transparent upper and lower electrodes 80 and 20 is much thinner than that of the upper and lower substrates 70 and 10, and the contact between the electrodes and the charged particles 50 and 60 is greater than that shown. Note that the thickness of the insulating layers 90 and 30 coated on the electrodes is also thin so as to prevent electron migration by the electrode.

In the collision charge type electronic paper display device having the above structure, when sufficient voltage is applied to the upper electrode 80 and the lower electrode 20, the charged particles 50 and 60 charged according to the applied electrode polarity are each electrode. Is drawn to. 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 such an image display apparatus according to the related art, in order to prevent the charged particles from moving in the parallel direction of the substrate, a partition wall 40 which is vertically connected to the opposing substrate is formed, and the display portion is constituted by a plurality of display cells. It is a collision charging electronic paper display device.

2 is a cross-sectional view illustrating a structure of a partition wall 40 vertically connected to a substrate in the light emitting display device according to the related art shown in FIG. 1. As shown, the conventional barrier rib 40 is made of black, and in particular, the upper end of the barrier rib 40 is also made of black. As the partition paste for forming such a partition, inorganic powder is mainly used, and other resins, solvents, and additives are included therein. The inorganic powder is a ceramic powder or a glass powder, and may be used in combination of one or two or more kinds. Examples of the ceramic powder include ZrO ₂ , Al ₂ O ₃ , CuO, MgO, TiO ₂ , ZnO _2, and the like. Oxide ceramics and non-oxide ceramics such as SiC, AlN, and Si ₃ O ₄ are known. Examples of the glass powder, melting the raw materials _{SiO 2, Al 2 O 3,} B 2 O 3, Bi 2 O 3, is ZnO, cooling, it is known to ground.

In addition, the solvent added to the partition paste is compatible with the above-described inorganic powders and resins, and examples thereof include aromatic solvents such as phthalate ester, toluene, xylene, benzene, and alcohols such as oxyalcohol, hexanol, and octanol. Ester solvents, such as a solvent and an acetate ester, are mentioned, It is known that it is normally added at 0.1-50 weight part with respect to an inorganic powder. If necessary, a dye, a polymerization inhibitor, a plasticizer, a thickener, a dispersant, an antioxidant, a curing agent, a curing accelerator, and a precipitation inhibitor may be added to the partition paste, and various dyes of organic or inorganic colors may be added. And pigments are used.

In particular, in the conventional self-luminous and water-emitting display devices, mainly black dyes and pigments are used to increase the contrast effect, and the black dyes and pigments include carbon black, chromium oxide, copper oxide, manganese dioxide, aniline black, Activated carbon; Thus, in forming the partitions, the formation of the partitions in dark colors such as black dyes and pigments was to increase the contrast by reducing the reflectivity of the black.

On the other hand, by using the electrophoretic phenomenon of the black and white charged particles located between the opposing substrate and the electrode, a voltage is first applied so that all the cells appear white, and then only the desired cells are applied to the opposite voltage so that they appear black. Collision-type electronic paper display device structures cannot display colors. In order to display colors, there is a method of realizing the color of the screen displayed by providing a color filter for filtering red, green, and blue light at a position opposite to each pixel in a lattice structure on the upper plate side.

As shown in FIG. 3, the matrix of the display device with the color filters is located at each boundary of the color layer of the color filter 110 representing red, green, and blue, respectively. 3 is a plan view illustrating a structure in which a color filter of a light emitting display device according to the related art is surrounded by a black matrix. In general, the matrix is implemented as a dark black matrix 100 to block light in a region that is not controlled by the pixel electrode, thereby improving contrast of the entire liquid crystal display. As shown, the color filter 110 is red, green, and blue between the boundary region of the pixel, that is, the barrier region through which light is not transmitted by the transparent electrode, and the black matrix positioned to face the data line and the gate line. Each has a color layer.

The black matrix has a lattice structure, and its height is generally uniform. In addition, the structure may be changed depending on the arrangement of colors, but the basic type is the same. Conventional methods used to produce the color filter including the black matrix use a method of depositing and patterning chromium or chromium oxide, or a method of coating and patterning a resin. The method of forming the black matrix using chromium or chromium oxide has a relatively low height of the black matrix, which is applied when forming the color layer by the pigment dispersion method. In addition, the method of forming a black matrix using the resin may form a black matrix having a relatively high height, which is applied when forming a color layer by an inkjet printing method. As mentioned above, the pigment dispersion method and the inkjet method are mainly used to form the color layer located between the black matrices.

As described above, the conventional self-luminous and light emitting display elements display characters or pictures in color and white on a black background, and should be as close to black as possible in the absence of light in order to increase contrast. . Therefore, it is common that the margin between the upper surface of a partition wall and the pixels of a color filter is treated with black.

However, such black bulkheads and matrices are inadequate in contrast or whiteness in the case of reflective displays using electrophoresis, which require black characters or pictures to be displayed on a white background. In contrast, the whiteness of the white screen becomes more important than the contrast of blackness. That is, although a black partition or a matrix has a good contrast effect in a conventional display device, since a black display is displayed on a white background in a reflective display device such as an electronic paper, there is a serious problem of inferior whiteness. It is.

The present invention has been made to solve the above problems, in the collision-charged electronic paper display device, a matrix surrounding the partition wall or color filter separating the cell and the cell between the upper and lower substrates, or the partition wall or An object of the present invention is to provide a collision-charged electronic paper display device in which the upper end of the matrix is white.

In this case, when the collision-charged electronic paper display device having the matrix of the partition or the color filter is white according to the present invention, the electrophoretic display screen may be reset to white when an erasing signal is input. This is to improve the addressing performance of black characters or pictures and images. That is, it is an object of the present invention to manufacture a display device having excellent whiteness that displays black characters or pictures on a white background in a reflective display device such as an electronic paper.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a collision charged electronic paper display device in which a matrix of partition walls or color filters is white. A collision including upper and lower electrodes formed of a transparent electrode ITO, black and white charged particles existing between the upper and lower electrodes, and a partition wall separating the cells from the upper and lower substrates to apply the In the charged electronic paper display device, the barrier rib is a collision-charged electronic paper display device, characterized in that the white.

Here, the collision charged electronic paper display device may further include a color filter on one side, preferably an outer side of the upper and lower substrates, the color filter is a collision charged electronic paper surrounded by a matrix of white Display devices are also possible. The present invention is characterized in that the matrix of the partition or color filter is white, the upper end of the partition or matrix may be in the form of white. Specifically, it is preferable that the white partition or matrix contains a white pigment or dye, and the white pigment or dye is more preferably titanium dioxide or barium sulfate.

In addition, the partition wall according to the present invention containing a white pigment or dye is a flexible selected at least one selected from the group consisting of polycarbonate (PC), polyethylene terephthalate (PET), polyethersulfone (PES) and polyimide film It may be made of a material, the thickness of the partition wall may be in the range of 10 ~ 500μm depending on the adhesive strength and the opening ratio of the upper and lower substrates. The barrier rib may be formed by a photolithography method, a screen printing method, a photosensitive member paste method, or an additive method.

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.

4 is a cross-sectional view and a perspective view showing a substrate and a lower electrode structure of a collision charged electronic paper display device according to the present invention, Figure 5 is a cross-sectional view and a perspective view showing a white partition structure of a collision charged electronic paper display device according to the present invention 6 is a structural cross-sectional view and a perspective view showing that an upper end of a partition wall of the collision charging type electronic paper display device according to the present invention is white. Here, reference numeral 1 is a lower substrate, 2 is a lower electrode, 3 is an upper insulating layer, 4 is a white partition, 5 is a black partition, 6 is an upper substrate, 7 is an upper electrode, 8 is an upper insulating layer, 9 is Charged particles, 10 denotes a color filter and 11 denotes a white matrix.

First, as shown in FIG. 4, a transparent lower electrode 2 and a lower insulating layer 3 are sequentially formed on the lower substrate 1. Since the basic electrode structure of the collision charged electronic paper display device is a matrix structure, the lower electrode 2 has a shape as shown in the right side of FIG. Preferably, the transparent lower electrode 2 is 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.

As shown in FIG. 5, a white partition 4 is formed on the substrate. Since the white partition 4 is simply used to distinguish cell units, the material may be variously applied to polymers, inorganic materials, and the like. In the present invention, a method for forming the white partition 4 is preferably a photolithography method using a photoresist, a method using a photosensitive polymer, a laminating method using a cut of a pre-made material, and the like. And it can be applied on the bottom plate formed in the manner of ultraviolet irradiation and the like. The white partition 4 according to the present invention has a lattice structure as shown in the right side of FIG. 5.

As described above, the present invention relates to a collision-charged electronic paper display device in which the matrix of the partition or color filter is white, wherein the matrix surrounding the partition or color filter separating the cell from the upper and lower substrates, or the partition wall. The collision charging type electronic paper display device, characterized in that the upper end of the matrix is white. More specifically, at least one of the transparent upper and lower substrates, the upper and lower electrodes formed of a transparent electrode (ITO) to apply a driving voltage of the device on the upper and lower substrates, and between the upper and lower electrodes In the collision charged electronic paper display device including the black and white charged particles present, and the partition wall separating the cell between the upper and lower substrate, the collision charged electron, characterized in that the partition is made of white Paper display device.

In another preferred embodiment of the present invention, the collision charged electronic paper display device may be a collision charged electronic paper display device, wherein an upper end portion of the barrier rib or matrix is white. 6 is a structural cross-sectional view and a perspective view showing that the upper end of the partition wall of the collision-chargeable electronic paper display device according to the present invention is made white. Here, the partition wall is composed of a white partition 4, the upper end, the middle and the lower end of the lower end is made of a black partition (5). As shown, even if the middle and the lower end except the upper end of the partition is black, when the upper end of the partition is white, it can exhibit the features according to the present invention. The present invention is directed to a reflective display device that displays black characters or pictures on a white background, wherein whiteness is increased by white partitions and matrices in a state where light is not emitted. It is also possible that only the upper end of the partition and the color filter is made white.

Conventional self-luminous and light emitting display devices display letters or pictures in black and white on a black background, so the bulkhead of the device should be as close to black as possible in the absence of light in order to increase contrast. . Thus, the margins between pixels of a conventional partition or color filter are generally black. However, such a black partition and matrix has a problem that the contrast is not suitable and the whiteness is lowered because a black character or a picture must be displayed on a white background in a reflective display using an electrophoretic phenomenon. That is, although a black partition or a matrix has a good contrast effect in a conventional display device, since a black display is displayed on a white background in a reflective display device such as an electronic paper, there is a serious problem of inferior whiteness. It is.

Thus, the present inventors have found that in the case of a collision-charged display device using an electrophoretic phenomenon, the whiteness of the device is excellent when the matrix of the partition or the color filter is implemented in white. Because reflective electronic paper has a memory effect, the electrophoretic display screen must be input with an erasing signal before addressing, and the electronic paper screen must be reset to white to black characters or pictures. Addressing is possible. That is, when the collision charging type electronic paper display device having the matrix of the partition or the color filter is white, there is an excellent effect of increasing the whiteness of displaying black characters or pictures on a white background.

As described above, the present invention relates to a collision-chargeable electronic paper display device in which the matrix of the partition or color filter is white. For this purpose, the partition or matrix includes a white pigment or dye. . In particular, the white pigment or dye is preferably titanium oxide (barium sulfate) or barium sulfate (barium sulfate). The partition paste material containing a white pigment or dye is dispersed and combined by a kneader, a stirrer, a triple roller, or the like in a desired composition. In addition to workability, the viscosity is preferably set to 500 to 300000 cps (500 to 300000 mcps).

In the present invention, such a partition wall paste 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.

In addition, the shape of the white partition wall according to the present invention is appropriately optimally set according to the size of the pixel for display, but the thickness of the partition wall is as wide as possible in consideration of the required adhesive strength of the upper and lower plates. This is advantageous. However, since the opening ratio is lowered according to the contact area, the upper thickness of the partition wall is preferably in the range of about 10 to 500 μm.

Examples of the method for forming the partition wall according to the present invention include a screen printing method, a sand blast method, a photosensitive paste method, and an additive method, which will be specifically described below.

As a specific process of the screen printing method, (1) the paste which becomes a partition material is prepared, and (2) the plate-making which consists of stainless steel mesh, polyester mesh, etc. which can print a partition pattern is prepared. (3) The paste is applied and transferred onto the substrate on one side (substrate formed with the above-described electrode pattern as necessary) through plate making. (4) It hardens | cures by heating etc. (5) (3) to (4) are repeated until a predetermined thickness (corresponding to the thickness of the partition wall) is produced to form a desired partition wall shape. Here, the plate making may be any one that can print a predetermined partition pattern, for example, a metal mesh such as a plated mesh, a high-strength material mesh, a chemical fiber such as a polyester mesh, a Tetron mesh, etc. to secure a high tension. Mesh, or a combination type mesh in which a polyester mesh is bonded between the plate frame and the printing area can be used.

A conventional screen printing machine can be used for screen printing, and the paste is transferred onto a substrate using a squeegee and a scraper through the plate making described above. In this case, the attack angle of the squeegee is 10 to 30 degrees, preferably 15 to 25 degrees, the squeegee speed is 5 to 500 mm / sec, preferably 20 to 100 mm / sec, and the squeegee pressure is 0.1 to 10 kg / cm 2. Preferably, it is preferable to set it as 0.5-3 kg / cm <2>.

As a concrete process of the sand blasting method, (1) a paste serving as a partition material is produced,

(2) Paste is apply | coated on one side board | substrate (substrate which formed the above-mentioned electrode pattern as needed), and it is made to dry-cure. (3) A dry film photoresist is attached thereon. (4) Only the pattern part which becomes a partition by exposure and etching is left. (5) The pattern portion from which the resist has been removed is etched by sand blast until a predetermined rib shape is obtained. In the case of sand blasting, it is important to adjust the balance between the air pressure applied to the abrasive and the injection amount of the abrasive to ensure the straightness of the abrasive injected from the nozzle of the sand blasting apparatus as much as possible. Since there is less excess diffusion, in particular the side edges of the bulkhead are reduced, resulting in a neat final shape of the partition to be formed. As the abrasive used in the sand blast, glass beads, talc, calcium carbonate, metal powder or the like can also be used.

As a specific process of the photosensitive paste method, (1) photosensitive paste containing photosensitive resin is produced. (2) The photosensitive paste is apply | coated on one board | substrate (substrate in which the above-mentioned electrode pattern was formed as needed). (3) A photomask is used to expose only the portion corresponding to the partition wall to cure the photosensitive paste (if necessary, the above steps (2) and (3) are repeated until the desired partition height is reached). (4) Develop and remove uncured parts.

(5) The hardened portion is fired as necessary. In addition, the photosensitive paste contains at least an inorganic powder, a photosensitive resin, and a photoinitiator, and is otherwise composed of a solvent, a resin, and an additive.

As a specific procedure of the additive method, (1) a photoresist film is attached onto a substrate. (2) By exposure etching, a photoresist film is left only in the part which becomes between the partition and partition which want to form. (3) The paste used as a partition material is produced and hardened.

(4) The photoresist film is removed to form a predetermined partition wall shape.

Subsequently, the upper electrode 7 and the upper substrate 6 are formed in the display device according to the present invention in which the partition wall is formed by the above-described method, as shown in FIG. 7. 7 is a schematic diagram showing a state in which a white partition is formed on a substrate and an electrode of a collision charge type electronic paper display device according to the present invention. As shown here, the transparent upper electrode 7 and the upper insulating layer (not shown) are sequentially formed on the transparent upper substrate 6 in the same process as the lower plate for use as the upper plate. As described above, the upper insulating layer may be selected as necessary. In this case, the upper electrode 7 may also have the same structure as the lower electrode 2 shown in FIG. 4, and the direction of the upper electrode 7 is defined by the white partition 4 according to the present invention between the lower electrode and the lower electrode 2. The stack is stacked in a direction perpendicular to the lower electrode 2.

The structure of the collision charged electronic paper display device according to the present invention formed through the above process is as shown in FIG. 8. 8 is a cross-sectional view illustrating a state in which white partitions are formed on a substrate and an electrode of a collision charged electronic paper display device according to the present invention. As illustrated, the formed upper plates 6, 7, 8 are disposed on the lower plates 1, 2, 3, and the white partition 4 according to the present invention, and bonded to each other. Then, if necessary, by alternately applying the opposite voltage to each electrode by moving the charged particles (9) to collide with each other so as to be charged in a negative or positive direction, respectively.

As shown, the structure comprises at least one transparent upper and lower substrates 6 and 1 opposite each other and a transparent electrode ITO to apply a driving voltage of the device on the upper and lower substrates 6 and 1. A cell between the formed upper and lower electrodes 7 and 2, black and white charged particles 9 existing between the upper and lower electrodes 7 and 2, and the upper and lower substrates 6 and 1; It consists of a white bulkhead 4 separating the cells. In the collision charge type electronic paper display device having the above structure, when sufficient voltage is applied to the upper electrode 7 and the lower electrode 2, the charged particles 9 charged according to the applied electrode polarity are attracted to each electrode. It is configured to go. 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 the light transmitted from the charged particles.

As shown in FIG. 9, the collision charging type electronic paper display device according to the present invention has an effective display surface of a cell on one side of the upper and lower substrates 6 and 1, and preferably on the outer side of the upper substrate 6. As a result, the color filter 10 is formed, and a white matrix 11 is formed at the boundary between the cells. The color filter 10 increases color purity by transmitting only a specific wavelength band of visible light generated from the charged particles 9 and traveling toward the display surface. Here, the white matrix 11 is formed in the form of a rectangular band that surrounds the cells in all directions, and serves to reset the display device screen to white when a signal signal without light is input. .

As described above, according to the present invention, at least one transparent upper and lower substrate, upper and lower electrodes formed of a transparent electrode (ITO) to apply a driving voltage of the device on the upper and lower substrates, and the upper and In the collision-charged electronic paper display device comprising black and white charged particles present between the lower electrode and the partition wall separating the cell from the upper and lower substrate, the partition wall is characterized in that the white It is possible to provide a collision charging electronic paper display device.

In the case of the collision-charged electronic paper display device in which the matrix of the partition or the color filter is white as described above, the electrophoretic display screen is reset to white when an erasing signal is input, thereby causing black characters. Alternatively, there is an effect that the addressing performance of the picture and the image is excellent. That is, in a reflective display device such as an electronic paper, the whiteness of displaying black characters or pictures on a white background is increased.

Claims (10)

At least one of the transparent upper and lower substrates, the upper and lower electrodes formed of transparent electrodes (ITO) to apply the driving voltage of the device on the upper and lower substrates, and the black and An electronic paper display device comprising white charged particles and a partition wall separating the cell from the upper and lower substrates, wherein the partition wall is made of white. The apparatus of claim 1, further comprising a color filter on one side of the upper and lower substrates, wherein the color filter is surrounded by a matrix made of white. The collision-chargeable electronic paper display device according to claim 1, wherein an upper end portion of the partition wall is white. The collision charged electronic paper display device according to claim 2, wherein the upper end of the matrix is white. The collision charge type electronic paper display device according to claim 3 or 4, wherein the partition wall or matrix made of white includes a white pigment or a dye. The collision-chargeable electronic paper display device according to claim 5, wherein the white pigment or dye is titanium dioxide or barium sulfate. The method of claim 1, wherein the barrier rib is made of a flexible material selected from at least one selected from the group consisting of polycarbonate (PC), polyethylene terephthalate (PET), polyether sulfone (PES) and polyimide film. Collision-type electronic paper display device. The collision-chargeable electronic paper display device according to claim 1, wherein a thickness of the partition wall is in a range of 10 to 500 µm depending on the adhesion strength and the opening ratio of the upper and lower substrates. The collision charged electronic paper display device according to claim 1, wherein the partition wall is formed by a photolithography method, a screen printing method, a photosensitive member paste method, or an additive method. The collision-chargeable electronic paper display device according to claim 2, wherein the color filter is formed on one side of the outer side of the upper and lower substrates.

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