KR100625463B1 - Method of Manufacturing Electronic Paper Display - Google Patents

Abstract

The present invention relates to a method for manufacturing an electronic paper display device, and more particularly, to a method for manufacturing an electronic paper display device.

In the method of manufacturing an electronic paper display device comprising a front substrate and a rear substrate on which transparent electrodes are formed, and cells separated by a predetermined gap by a partition wall between the front substrate and the rear substrate, a first transparent electrode film is formed on the rear substrate. And patterning by using a first transparent electrode film, transferring and laminating a first adhesive means on an upper portion on which the first transparent electrode is formed, attaching a partition on the laminated first adhesive means, and forming a rear surface. Injecting colored charged toner particles into the cell, forming a second transparent electrode film on the front substrate, patterning the second transparent electrode film, transferring the second adhesive means to the upper portion where the second transparent electrode is formed, and laminating the same. Steps and a rear substrate on which the first transparent electrode, the first bonding means and the partition wall are formed, and the rear substrate on which the second transparent electrode and the second bonding means are formed A a step of cementation.

In the electronic paper display device of the present invention, by using a copolymer of EVA having different transition temperatures, the first electrode and the partition wall formed on the front substrate, and the second electrode and the partition wall formed on the rear substrate are sequentially firmly bonded to each other to be present in the cell. This has the effect of preventing particles from leaking over the side cells or bulkheads.

Description

Method of Manufacturing Electronic Paper Display             

1 is a cross-sectional view schematically showing an electronic paper display device using a conventional electronic ink (Electronic Ink).

2 is a flowchart illustrating a method of manufacturing an electronic paper display device according to the present invention.

The present invention relates to an electronic paper display device, and more particularly, to an electronic paper display device capable of improving driving efficiency by lowering a driving voltage.

In general, digital paper displays are spotlighted as next-generation display devices following liquid crystal displays, plasma display panels, and organic luminescence devices. It is evaluated as an ideal ideal device as a display device.

In particular, electronic paper is a flexible substrate, such as a thin plastic with millions of beads scattered in oil holes, and a display element that can display characters or images, which can be reproduced and used millions of times in the future. It is expected to be a material to replace existing print media such as newspapers, newspapers and magazines. In addition, electronic paper is much cheaper to produce than conventional flat display panels, and since it does not require background lighting or continuous recharging like a normal screen, it can be driven with very little energy, leading to energy efficiency. In addition, the electronic paper is very clear, has a wide viewing angle, and even has a memory function that does not completely disappear even if there is no power source, so it can be widely used in public bulletin boards, advertisements, and e-books.

Such an electronic paper display device is divided into an electrophoretic type, a xylic type, and a toner type according to its structure, and an electronic paper display using an electrophoretic type of electronic ink (hereinafter referred to as 'E-Ink'). The device is used habitually.

1 is a schematic cross-sectional view of an electronic paper display device using a conventional electronic ink.

Referring to FIG. 1, in the electronic paper display device using the electronic ink, the front substrate 10 and the rear substrate 14 are installed in parallel at a predetermined distance. The front and rear substrates 10 and 14 may be formed of any one of plastic or glass. The front transparent electrode pairs 12a and 12b are formed side by side on the rear surface of the front substrate 10. The rear transparent electrode pairs 16a and 16b are formed in parallel on the front surface of the rear substrate 14 so as to correspond to the front transparent electrode pairs 12a and 12b. The transparent electrode pairs are supplied with a controlled polarity control signal of an external driver. Between the transparent electrode pairs 12a, 12b, 16a, and 16b, a film in which organic capsules 18a and 18b having a diameter of about 150 μm or more and 200 μm or less is uniformly dispersed is formed. Black and white pigments composed of particles having a diameter of 0.5 µm or more and 1 µm or less are dispersed in the suspension in the organic capsules 18a and 18b.

Looking at the operation method of the electronic paper display device having such a structure, first, when the negative electric field is applied to the transparent electrode, the white particles 20a, which are (+) charged particles, are the upper surface of the capsule 18a, that is, the user can see. Is moved in the direction. At this point, the white color is displayed on the surface where white particles are moved. At the same time, the opposite positive electric field attracts the black particles 20b, which are negatively charged particles, to the lower surface of the hidden capsule 18a. When the process is reversed, black particles appear on the top of the capsule causing black to appear at the marking points on the surface.

Meanwhile, in the conventional electronic paper display device, when the front substrate, the rear substrate and the partition wall are bonded together, the bonding does not become firm, causing a problem that particles existing in the cell leak onto the side cells or the partition walls.

Accordingly, the present invention is a plate for solving the above problems, in order for the reflective electronic paper display device to be commercialized as an information display, the front substrate, the rear substrate, and the partition wall are formed so that particles existing in the cell do not leak over the side cell or the partition wall. An object of the present invention is to provide an electronic paper display device which is firmly bonded to each other.

In the manufacturing method of the electronic paper display device comprising a cell partitioned at regular intervals by a partition between the front substrate and the rear substrate and the front substrate and the rear substrate formed with the transparent electrode of the present invention for achieving the above object Forming a first transparent electrode film on the rear substrate, patterning using the first transparent electrode film, transferring the first adhesive means to the upper part on which the first transparent electrode is formed, and laminating the upper part of the laminated first adhesive means. Attaching a partition wall to each other, injecting colored charged toner particles into a cell formed on a rear surface, forming a second transparent electrode film on a front substrate, patterning a second transparent electrode film, and forming an upper portion of the second transparent electrode. Transferring and laminating the second bonding means to the second substrate; and the second substrate and the second substrate having the first transparent electrode, the first bonding means, and the partition wall formed thereon. Electrode and a and a step of laminating the back of the substrate having a second bonding means.

Adhesive means is characterized in that any one of plastic or adhesive or EVA (Ethylene-Vinylacetate Copolymer).

The first bonding means and the second bonding means are characterized in that the transition temperature (Tg) is different.

When the adhesive means is EVA, it is possible to control the transition temperature by changing the composition of ethylene and vinylacetate.

The transition temperature of the first bonding means formed on the back substrate is higher than the transition temperature of the second bonding means formed on the front substrate.

It is possible to process by changing the rear substrate and the front substrate.

The method of injecting the toner particles is characterized by one of corona discharge, triboelectric discharge and laser printer.

The rear substrate and the front substrate are characterized in that the bonding by the heat fusion method.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

2 is a flowchart illustrating a method of manufacturing an electronic paper display device according to the present invention. The manufacturing method of the electronic paper display device according to the present invention includes the manufacturing method of the panel of FIG.

Referring to the panel manufacturing process listed in Figure 2 as follows. In the step (a), in the electronic paper display device, a first transparent electrode film 102 made of indium-tin-oxide (ITO) or a polymer is formed on the back substrate 100 made of glass or plastic.

In the step (b), the photoresist 104 is applied on the first transparent electrode film 102. In step (c), a photomask 106 having a predetermined pattern is formed on the photoresist 104, and light is irradiated to cure the photoresist 104. This process is called an exposure process. After the exposure process, the uncured photoresist 104 is washed through the developing process in step (d), and then etched in step (e) to form the first transparent electrode 102.

In the step (f), the first bonding means 108 having a high transition temperature is transferred onto the first transparent electrode 102 and laminated.

At this time, the adhesive means 108, 114 is any one of plastic or adhesive or EVA (Ethylene-Vinylacetate Copolymer). In addition, when the adhesive means (108, 112) is EVA, it is possible to control the transition temperature by changing the composition of ethylene and vinylacetate.

The first bonding means 108 laminated in step (g) attaches the partition wall 110 to the rear substrate using a thermal fusion method.

In step (h), the colored positive toner particles 111a and 111b in the lower cells are injected by corona discharge or triboelectric discharge or laser printer method.

In the step (i), the second transparent electrode 112 is formed on the front substrate 200 through the steps (a) to (e).

In the step (j), the lamination is performed by transferring the upper portion of the second transparent electrode 112 using the second bonding means 114 having a low transition temperature.

In the step (k), the second adhesive means 114, which laminates the partition wall 110 and the front substrate 200, attached to the rear substrate 100, is firmly bonded using a thermal fusion method.

By using the first bonding means 108 and the second bonding means 114 having different transition temperatures as described above, the first bonding means 108 used to attach the partition wall 110 to the rear substrate 100 is then added. In the process, the barrier ribs 110 attached to the front substrate 200 and the rear substrate 100 are bonded to each other using a thermal fusion method.

In this case, in the conventional bonding method, since the transition temperatures of the first and second bonding means 108 and 114 are the same, the rear substrate 100 and the front substrate 200 to which the partition wall 110 is attached are heated using a thermal fusion method. At the time of bonding, the first bonding means 108 may melt and may not be firmly bonded. In addition, a problem may occur in which the charged toner particles 111a and 111b existing in the cell leak over the side cell or the partition wall 110.

In order to solve this problem, using the bonding means (108, 114) having a different transition temperature, when the rear substrate 100 and the front substrate 200 to which the partition wall 110 is attached are bonded by using a heat fusion method. In addition, since the first bonding means 108 does not melt due to a high transition temperature, only the second bonding means 114 may be firmly bonded.

On the other hand, in the bonding of the front substrate, the back substrate and the partition wall in the electronic paper display device of the prior art, there is a problem that the particles are not firmly adhered so that the particles present in the cell leaks over the side cells or partition walls.

However, the electronic paper display device of the present invention uses a copolymer of EVA having different transition temperatures, so that the first electrode 102 formed on the back substrate 100, the partition 110, and the second formed on the front substrate 200. The electrode 112 and the partition wall 110 are sequentially firmly bonded to prevent the charged toner particles 111a and 111b present in the cell from leaking out to the side cell or the partition wall 110.

As described above, it will be understood by those skilled in the art that the technical configuration of the present invention may be implemented in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, the exemplary embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following claims rather than the detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

As described above, the electronic paper display device of the present invention uses a copolymer of EVA having different transition temperatures so that the first electrode and the partition wall formed on the front substrate and the second electrode and the partition wall formed on the rear substrate are sequentially firmly bonded into the cell. This prevents existing particles from leaking out to the side cells or bulkheads.

Claims (8)

In the manufacturing method of an electronic paper display device comprising a cell partitioned at a predetermined interval by a partition between the front substrate and the rear substrate and the front substrate and the rear substrate on which the transparent electrode is formed, Forming a first transparent electrode film on the back substrate; Patterning the first transparent electrode film; Transferring the first adhesive means to the upper portion on which the first transparent electrode is formed and laminating; Attaching a partition on the laminated first bonding means; Injecting colored charged toner particles into a cell formed on a rear surface thereof; Forming a second transparent electrode film on the front substrate; Patterning the second transparent electrode film; Transferring the second adhesive means to the upper portion on which the second transparent electrode is formed and laminating; And Bonding the rear substrate on which the first transparent electrode, the first bonding means, and the partition wall are formed, and the rear substrate on which the second transparent electrode and the second bonding means are formed; Method of manufacturing an electronic paper display device comprising a. The method of claim 1, The method of manufacturing the electronic paper display device, characterized in that the adhesive means is any one of a plastic or an adhesive or EVA (Ethylene-Vinylacetate Copolymer). The method of claim 1, And the first bonding means and the second bonding means have different transition temperatures (Tg). The method of claim 2, When the adhesive means is EVA, the manufacturing method of the electronic paper display device, characterized in that the transition temperature can be adjusted by changing the composition of ethylene and vinylacetate. The method of claim 1, A method of manufacturing an electronic paper display device, characterized in that the transition temperature of the first bonding means formed on the back substrate is higher than the transition temperature of the second bonding means formed on the front substrate. The method of claim 1, And a process of changing the rear substrate and the front substrate. The method of claim 1, And the method of injecting the toner particles is one of corona discharge, triboelectric discharge and laser printer. The method of claim 1, And the rear substrate and the front substrate are bonded by a thermal fusion method.

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