KR20170084821A - Display device and manufacturing method of the same - Google Patents

Abstract

A display device according to an embodiment of the present disclosure includes a first electrode substrate, a barrier rib that is disposed on the first electrode substrate and forms a plurality of cell spaces, and a second electrode substrate that is disposed on the barrier rib to cover the display element And the barrier rib comprises a first barrier rib layer and a second barrier rib layer formed on the first barrier rib layer. By including the second barrier rib layer, disturbance for bonding between the barrier rib and the second electrode substrate can be removed, and the sealing ability of the display device can be improved.

Description

TECHNICAL FIELD [0001] The present invention relates to a display device and a method of manufacturing the same,

The present disclosure relates to a display device and a method of manufacturing the same.

Electronic paper (e-paper) display devices are attracting attention as next generation display media. Although it is difficult to realize a fast response speed of a display device, the display device is excellent in low cost, thinness, and stability compared to the conventional display, and research and development are actively conducted in various fields. In addition, electronic paper has portability, flexibility, high color contrast, and real-time information providing characteristics.

Currently, various electronic paper display device technologies are being developed, and currently commercialized technology is an electrophoretic display device. Electrophoresis refers to the transfer of charged substances in an oily medium under the influence of an electric field.

The structure of the electrophoretic display device is composed of transparent capsules or honeycomb-shaped cups filled with white and black particles charged with different electric charges together with transparent fluid between two electrode substrates.

When the voltage is applied to the upper and lower electrode substrates, the white and black particles of the display element inside the capsule or the cup move in opposite directions by electrophoresis, thereby displaying white and the search color.

The cup-shaped display device has a disadvantage in that mass production and uniform dispersion of the internal display elements are advantageous in that a cell space is formed by providing barrier ribs on the substrate, but the sealing method is difficult. If the sealing is not properly performed, the display element inside the cup may be exposed to the outside, and the display device may be defective.

Accordingly, there is a need for a method of improving the sealing force between the electrode substrate and the partition in the cup-shaped display device.

One of the objects of the present disclosure is to provide a plasma display panel including barrier ribs including a first barrier rib layer and a second barrier rib layer to eliminate disturbance for bonding between the barrier rib and the second electrode substrate to improve the sealing ability of the display device And a display device capable of displaying an image.

One of the various solutions proposed through the present disclosure includes a first electrode substrate, a barrier rib that is disposed on the first electrode substrate and forms a plurality of cell spaces, and a second electrode substrate that is disposed on the barrier rib to cover the display element And the barrier rib comprises a first barrier rib layer and a second barrier rib layer formed on the first barrier rib layer. By including the second barrier rib layer, disturbance for bonding between the barrier rib and the second electrode substrate can be eliminated, thereby improving the sealing ability of the display device.

In the inductor according to one embodiment of the present disclosure, when the barrier rib and the second electrode substrate are bonded to each other, the barrier rib includes the second barrier rib layer to prevent interference between the barrier rib and the second electrode substrate, The power can be improved.

1 shows a schematic cross-sectional view of an electronic paper display device according to an embodiment of the present disclosure.
2A to 2D schematically show a method of manufacturing an electronic paper display device according to an embodiment of the present disclosure.

The present disclosure will now be described in more detail with reference to the accompanying drawings. In the drawings, the shapes and sizes of elements and the like can be exaggerated for clarity.

The present disclosure relates to a display device, and the display device can be typically used for electronic paper. Hereinafter, a display device and a manufacturing method thereof will be described.

Hereinafter, the display device according to the present disclosure will be described in detail.

1 is a cross-sectional view schematically showing a display device according to an embodiment of the present disclosure.

1, a display device 100 according to an embodiment of the present disclosure includes a first electrode substrate 110, barrier ribs 120 and 125 forming a plurality of cell spaces on the first electrode substrate 110, A display element 130 disposed in the cell space, and a second electrode substrate 140 disposed on the barrier rib to cover the display element. The barrier rib includes a first barrier rib layer 120, And a second barrier rib layer 125 formed on the second barrier rib layer 125.

A first electrode made of a transparent material is formed on the first substrate 110 on the first electrode substrate 110. The forming position of the first electrode is not particularly limited but may be formed on one surface of the first substrate facing the display device, And may be formed on the other surface or inside of the first substrate.

Since the first electrode substrate 110 may be provided as a display surface, the first electrode substrate 110 may be made of a transparent material.

In the present disclosure, the light transmittance of the transparent material can be determined within a range that does not deteriorate the visibility, and for example, it can be formed of a material having a light transmittance of 85% or more.

The first electrode may be made of a conductive material, and electrode materials conventionally used in the technical field of the present disclosure may be used. For example, a conductive polymer such as polythiophene or polyaniline, metal particles such as silver or nickel, a polymer film containing the metal particles, and indium-tin-oxide (ITO) may be used.

The first substrate may be made of glass or a flexible plastic. The plastics include, but are not limited to, polyethylene terephthalate (PET), polycarbonate (PC), or polymethylmethacrylate (PMMA), polyethylene naphthalate (PEN), polyethersulfone (PES) A cyclic olefin polymer (COC), polydimethylsiloxane (PDMS), or polyurethane acrylate (PUA) can be used.

The first electrode substrate 110 may have an adhesive layer 111 formed on one side of the first electrode substrate 110 for adhesion with the barrier ribs 120 and 125.

The barrier ribs 120 and 125 are disposed on the first electrode substrate 110 and divide spaces to provide a plurality of cell spaces. The plurality of barrier ribs may be formed.

The barrier ribs 120 and 125 may be bonded to the first electrode substrate by the adhesive layer or may be formed integrally with the first electrode substrate 110.

The display device 130 is filled in the cell space between the barrier ribs 120 and 125.

In the display device 130, two types of display particles 131 charged with different electric charges are dispersed in a transparent fluid (not shown).

The display particles 131 dispersed in the transparent fluid may be positive charged white display particles 131a and negative charged black display particles 131b.

The transparent fluid may be an organic solvent and may be an aromatic hydrocarbon. Examples of the aromatic hydrocarbon include alkylbenzene derivatives such as benzene, toluene, xylene, ethylbenzene, and dodecylbenzene, phenylcyclohexane, Diallylalkane derivatives such as tritylethane and 1,2-bis (3,4-dimethylphenylethane) (BDMF), alkylnaphthalene derivatives such as diisopropylnaphthalene, and isopropylphenyl, isopropylphenyl, Phenyl, etc., terphenyl derivatives hydrogenated at various ratios, triarylzymethane derivatives such as dibenzyltoluene, benzylnaphthalene derivatives, phenylene oxide derivatives, gyryrialkylene derivatives, allylene dans derivatives, polychlorinated biphenyls Derivatives, naphthenic hydrocarbons, and the like. In addition, aliphatic hydrocarbons such as hexane, cyclohexane, kerosene, isobar and paraffinic hydrocarbons, halogenated compounds such as chloroform, trichlorethylene, tetrachlorethylene, trifluoroethylene, tetrafluoroethylene, dichloromethane, Phthalic acid esters such as dicyclohexyl phthalate, phthalic acid diacyl phthalate, dicyclohexyl phthalate, and the like, phosphoric acid esters such as oleic acid Butyl, diethylene glycol dibenzoate, dioctyl sebacate, dibutyl sebacate, trioctyl dioctyltrimethylolmellitate, acetyltriethyl citrate, dodecyl maleate, dibutyl maleate, ethyl acetate and the like Acid esters, chlorinated paraffin, and N, N-dibutyl-2-butoxy-5-tertiary octyl aniline.

The transparent fluid is not limited to those described above, and the transparent fluid may be used singly or in combination of two or more.

The display particles 131 may be formed using inorganic or organic pigment particles.

Examples of the inorganic pigment particles include white pigments such as white pigments, zinc pigments, lithopone, titanium dioxide, zinc oxide, antimony oxide, calcium carbonate, kaolin, mica, barium sulfate, gloss white, alumina white, talc, silica, calcium silicate, cadmium red, White iron oxide, titanium yellow, titanium barium yellow, cadmium orange, cadmium ritofone orange, morbidate orange, red iron oxide, podium, scarlet red, cadmium red, cadmium ritofone red, amber, brown iron oxide, Cobalt blue, cobalt aluminum chromium blue, cobalt violet, minerals violet, carbon black, iron black, manganese ferrite black, cobalt chrome green, chromium oxide, pyridine, cobalt green, cobalt chrome green, titanium cobalt green, Cobalt ferrite black, copper chrome black, copper chromium manganese black, black low-dimensional titanium oxide (titanium black), aluminum It may be the flour, dongbun, ROCK, tin powder, zinc powder and the like.

Examples of the organic pigment particles include first yellow, disazo yellow, condensed azoiron, anthrapyrimidine yellow, ISO indoline yellow, copper azomethine yellow, quinophthaloin yellow, benzamidazolone yellow, Wherein the coloring agent is selected from the group consisting of yellow, monoazo yellow lake, dinitroaniline orange, pyrazolone orange, perinone orange, naphthol red, toluidine red, pamanendocarmin, brilliant first skarred, pyrazolone red, permanent red, lisorred, But are not limited to, lake red, brilliant carmine, naphthol red, quinacridone magenta condensate azoled, naphthocarmin, perylenescal red, condensed azoscarrad, benzimidazolonamine, anthraquinolyl red, perylene red, Maroon, quinacridone maroon, quinacridone scarlet, quinacridone red, diketopyrrolopyrrole red, benzamidazolone brown, phthaloic acid Nin green, you can use the Victoria blue lake, phthalocyanine blue, first skive base, alkaline Libreville tona, Dan Tron blue, methyl violet lake, dioxazine violet, violet-naphthol and the like.

When a voltage is applied to the first and second electrode substrates 110 and 140, white display particles 131a and black display particles 131b of the display element move in opposite directions due to electrophoresis . The display particles emerge or descend, and thus black or white is displayed.

The second electrode substrate 140 is opposed to the first electrode substrate 110 so as to cover the display elements formed by the barrier ribs at a predetermined distance, and the second electrode is formed on the second substrate.

The second electrode substrate 140 may be formed of the same material as the first electrode substrate 110.

The formation position of the second electrode is not particularly limited and may be formed on one surface of the second substrate facing the display element or on the other surface or inside the second substrate.

The second electrode substrate 140 may have an adhesive layer 141 formed on one side of the second electrode substrate 140 for adhesion with the barrier ribs.

In a conventional display device, a barrier is provided on a first electrode substrate to form a cell space, and then a display element is filled in the cell space. When a display element including an organic solvent is present on the upper surface of the barrier, Sealing between the adhesive layer of the substrate and the partition wall is not properly performed. As a result, the display element inside the cell space may be exposed to the outside, which may cause a failure of the display device.

The display device 100 according to an embodiment of the present disclosure includes a first barrier rib layer 120 and a second barrier rib layer 125 formed on the first barrier rib layer. That is, the second barrier rib layer 125 of the barrier ribs may be in contact with the adhesive layer 141 formed on the second electrode substrate.

The first barrier rib layer 120 may include a barrier rib and the second barrier rib layer 125 may improve the sealing ability of the second electrode layer.

The first barrier rib layer 120 may be an insulating material conventionally used in the technical field of the present disclosure. For example, a thermosetting resin or a UV curable resin may be used. For example, a polyethylene terephthalate (PET), a polycarbonate (PMMA), polyethylene naphthalate (PEN), polyether sulfone (PES), cyclic olefin polymer (COC), polydimethylsiloxane (PDMS) or polyurethane acrylate , polyurethane acrylate).

The second barrier rib layer 125 may be a hydrophilic material.

If the second partition wall layer 125 is hydrophilic, a display element including an organic solvent can not exist on the upper surface of the partition wall.

Specifically, if the surface of the barrier rib is hydrophilic, even if the display element is deposited on the upper surface of the barrier rib, due to the difference in surface tension between the organic solvent of the display element and the surface of the barrier rib, And does not remain on the surface of the partition wall.

In the display device of the present disclosure, since the barrier rib includes the second barrier rib layer, disturbance of the display element by the transparent fluid can be removed at the interface between the barrier rib and the adhesive layer formed on the second electrode substrate, The sealing force can be improved.

The second barrier rib layer 125 may have a thickness of 10 탆 or less.

The second barrier rib layer 125 is preferably thin, but may be formed to cover the entire upper surface of the first barrier rib layer.

If the second barrier rib layer is more than 10 mu m, the height of the barrier rib may be increased to increase the distance between the first electrode substrate and the second electrode substrate. As a result, the fluidity of the particles of the electronic paper is lowered, The driving to cover the element may not be smooth.

Hereinafter, the manufacturing method of the display device according to the present disclosure will be described in detail.

2A to 2D schematically show a method of manufacturing an electronic paper display device according to an embodiment of the present disclosure.

Referring to FIGS. 2A to 2D, a method of manufacturing an electronic paper display device according to an embodiment of the present disclosure includes: providing a first electrode substrate and a second electrode substrate; Forming a second barrier rib layer 25 on the first barrier rib layer and patterning the first barrier rib layer 20 and the second barrier rib layer 25 to form a plurality of cell spaces, Forming the barrier ribs 120 and 125, injecting the display element 130 into the cell space, and disposing the second electrode substrate 140 on the barrier rib to cover the display element.

First, the first electrode substrate and the second electrode substrate may be provided, and an adhesive layer may be formed on one surface of the first and second electrode substrates.

The first electrode substrate and the second electrode substrate may have a first electrode and a second electrode formed on one surface of the first electrode substrate and the second electrode substrate, respectively.

The first and second electrodes are not particularly limited and can be formed by a plating process or a printing method using a conductive material.

An adhesive layer may be formed on one side of the first and second electrodes to seal the barrier ribs.

Next, as shown in FIG. 2A, a first barrier rib layer 20 is formed on the first electrode substrate 110, and a second barrier rib layer 25 is formed on the first barrier rib layer .

The first barrier rib layer 20 may be formed by applying an insulating material on the first electrode substrate. The insulating material may be, for example, a thermosetting resin or a UV-curable resin.

The second barrier rib layer 25 may be formed by applying or coating a hydrophilic material.

The second barrier rib layer 25 may be formed as thin as possible, and may have a thickness of 10 탆 or less.

Next, as shown in FIG. 2B, the first and second barrier rib layers are patterned to form barrier ribs 120 and 125, which form a plurality of cell spaces.

The method of forming the barrier ribs 120 and 125 is not particularly limited and may be formed using laser patterning or photolithography.

Next, as shown in FIG. 2C, the display element 130 is filled in the plurality of cell spaces.

The display element 130 may be one in which white display particles and black display particles are dispersed in a transparent fluid.

The display device 130 may be provided with a filter on the first electrode substrate, and may be injected into the cell space using a squeegee or the like.

The cell space may be filled with a transparent fluid so that the display particles can be easily rotated.

Then, the second electrode substrate 140 is disposed so as to face the first electrode substrate and cover the display element.

The present disclosure is not limited by the above-described embodiments and the accompanying drawings, but is intended to be limited by the appended claims. Accordingly, various modifications, substitutions, and alterations can be made by those skilled in the art without departing from the spirit of the present disclosure, which is also within the scope of the present disclosure something to do.

100: display device 110: first electrode substrate
111, 141: adhesive layer 120, 125: partition wall
130: display element 131: display particle
40: second electrode substrate

Claims (8)

A first electrode substrate;
Barrier ribs disposed on the first electrode substrate and defining a plurality of cell spaces;
A display element disposed inside the cell space; And
And a second electrode substrate disposed on the barrier rib to cover the display element,
Wherein the barrier rib comprises a first barrier rib layer and a second barrier rib layer formed on the first barrier rib layer.
The method according to claim 1,
And the second partition wall layer is a hydrophilic material.
The method according to claim 1,
And the second partition wall layer is 10 mu m or less.
The method according to claim 1,
And an adhesive layer disposed between the second electrode substrate and the second barrier rib layer.
Providing a first electrode substrate and a second electrode substrate;
Forming a first barrier rib layer on the first electrode substrate;
Forming a second barrier rib layer on the first barrier rib layer;
Patterning the first and second barrier rib layers to form barrier ribs defining a plurality of cell spaces;
Injecting a display element into the cell space; And
And disposing the second electrode substrate on the barrier rib to cover the display element.
6. The method of claim 5,
Wherein the second partition wall layer is a hydrophilic material.
6. The method of claim 5,
And the second barrier rib layer is 10 占 퐉 or less.
6. The method of claim 5,
In the step of preparing the electrode substrate,
Wherein the first and second electrode substrates have an adhesive layer on one side thereof.

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