KR101418353B1 - The E-ink board and method for fabricating of the same - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly, to an E-ink board using an electrophoretic method and a manufacturing method thereof.

An E-ink board according to the present invention includes an E-ink film composed of a black dye and a white dye as charge carriers, A first substrate having a first electrode formed on a front surface thereof and a second substrate having a second electrode formed on an upper portion of the ink-film and having a minute pattern.

Since the E-ink board according to the present invention can replace a commonly used black board or white board, there is no need to use consumable parts or the like, It is possible to reduce the cost and also to reduce environmental pollution.

Description

[0001] The present invention relates to an ink-ink board and a method of manufacturing the same,

1 is a view for explaining the principle of an electrophoretic display device,

2 is a cross-sectional view showing an e-ink board according to the present invention,

Figs. 3A to 3C are process sectional views showing the manufacturing process of the e-ink board according to the present invention in the order of process.

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

100: first substrate 102: second electrode

200: e-ink film (charge layer) 300: second substrate

302: second electrode

The present invention relates to an electrophoresis method using an E-ink, and an E-ink Board and a method of manufacturing the same.

In recent years, in addition to an LCD using a liquid crystal, a PDP using a principle of emitting light when a gas is converted into a plasma state, an OLED implementing a display device using an organic material emitting light by itself, A method of implementing an image using the property of moving within a fluid medium has also been proposed.

Particularly, the method using charged particles is called electrophoresis, and the charged particles move toward the anode or the cathode.

Hereinafter, an example of a display medium using an electrophoretic method will be described with reference to the drawings.

1 is a view for explaining a driving principle of a general electrophoretic display device.

As shown in the drawing, ink in the form of encapsulating the charged particles 40a and 40b through the condensation polymerization reaction is used as the charge layer 46, and one side and the other side of the charge layer 46 Electrodes 48 and 50 are formed.

At this time, the electrode on one side is partly patterned and becomes (+) or (-) polarity, and the other electrode is the common electrode 50 formed on the front surface of the substrate.

In general, as an example for fabricating the charge layer 46 as described above, a white dye, indium-tin-oxide (ITO), and a black dye, carbon, Followed by encapsulation through a condensation polymerization reaction.

At this time, since the size of the capsule 44 including the black die 40a and the white die 40b is not constant, only the capsules 44 of a predetermined size are selected through filtering.

When a positive or negative polarity voltage is applied to the charge layer 36 thus manufactured, the charged black die and white dies 40a and 40b in the capsule 44 move.

At this time, when the black die 40b moves upward, black is displayed, and when the white die 40a moves upward, white is displayed.

Accordingly, the display form of the e-book using the electrophoresis method is displayed with a black character on a white background.

Although such a display form has not yet been commercialized as a display device that implements moving pictures and full color, its application as a display panel for an ebook used in an electronic dictionary or an electronic book that has been proposed recently is attracting attention.

An object of the present invention is to manufacture an ink-ink board using an E-ink which operates in an electrophoretic manner as described above.

If an e-ink board according to the present invention is used instead of a commonly used black board and white board, there is no need to use consumables such as a chalk or a marker, There is an advantage that no additional cost is incurred.

According to an aspect of the present invention, there is provided an ink-ink board comprising: a first substrate; A first electrode layer formed on a front surface of the first substrate; An electric charge layer formed on the first electrode layer and formed of a charged particle; A transparent second substrate formed on the upper portion of the charge layer; A second electrode formed on a surface of the second substrate facing the charge layer, the first electrode and the second electrode being spaced apart from each other; An electronic pen which moves in contact with a surface of the second substrate; And a power source to which the electronic pen and the first electrode are connected.

Wherein the charge layer is composed of a plurality of capsule aggregates encapsulated by a condensation polymerization reaction between a black die and a white die, which are charged particles having polarities opposite to each other.

When a voltage is applied to the first electrode and the electronic pen, the first electrode has a positive polarity and the electronic pen has a negative polarity.

And the second substrate has a conductive property in an up-down direction.

The charged particle moves up and down by a first electrode having a positive polarity and a second electrode having a negative polarity by the electronic pen.

The electronic pen is characterized in that a portion of the electronic pen which is in contact with the second substrate has conductivity.

A method of manufacturing an e-ink board according to an aspect of the present invention includes: preparing first and second substrates; Forming a first electrode layer on the entire surface of the first substrate; Attaching a charge layer formed of a charged particle to an upper portion of the first electrode layer; Forming a second electrode composed of a plurality of pieces spaced apart from the second substrate; A first substrate including the first electrode and a charge layer, and a second substrate including the second electrode; And connecting the first electrode and a separate electronic pen to a power source.

Wherein the charge layer is composed of a plurality of capsule aggregates encapsulated by a condensation polymerization reaction between a black die and a white die, which are charged particles having polarities opposite to each other.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

- Example -

A feature of the present invention is that the electrophoretic method produces an ink board.

2 is a cross-sectional view showing a schematic configuration of an e-ink board according to the present invention.

Ink board 99 according to the present invention includes a first substrate 100, a first electrode 102 formed on the front surface of the first substrate 100, a first electrode 102 Ink film 200 including a black die 202a and a white die 202b which are formed on the upper side of the ink film 200 and have a negative polarity and a positive white polarity, A plurality of second electrodes 302 disposed at a lower portion of the second substrate 300 and spaced apart at a finely spaced interval from each other; - >) polarity.

At this time, the electronic pen 400 and the first electrode 102 are connected to the (-) terminal and the (+) terminal of the power source 200 mounted on the ink-ink board 99.

The second substrate 300 is highly flexible and preferably has an anisotropic conductivity.

That is, it is most preferable to use a substrate made of a conductive polymer material having a property of electrically conducting up and down.

In addition, the electronic pen 400 may be formed of a conductive material that contacts the second substrate 300.

The operation of the ink-ink board constructed as described above will be described below.

When the power source 420 is turned on, a voltage is applied to the first electrode 102 of the ink-ink board and the electronic pen 400.

At this time, the first electrode 102 has a positive polarity and the electronic pen 400 has a negative polarity. And vice versa.

When the electronic pen 400 is moved after contacting the second substrate 200, the second electrode 302, which the electronic pen 400 touches, has the same polarity as the electronic pen 400 The white die 202b having the (+) polarity of the charged particles moves in the direction of the second substrate 300.

Therefore, the white die 202b moves to the surface of the substrate 200 according to the movement path of the electronic pen 400. [

At this time, the black dies 202a and the white dies 202b are observed in a dark gray state because they are mixed in the capsules 204.

Therefore, when the electronic pen 400 is moved in a state of being in contact with the surface of the second substrate 300, an effect of drawing letters and pictures in white on a dark gray background can be obtained.

An ink-ink board can be manufactured using the above-described principle, and a method of manufacturing the ink-board constructed as described above will be described below.

FIGS. 3A to 3C are process sectional views sequentially illustrating the manufacturing process of the ink-ink board according to the present invention.

As shown in FIG. 3A, a first electrode 102 is formed by depositing a transparent conductive material on the entire surface of the transparent first substrate 100.

The transparent conductive material is selected from a group of transparent conductive metals including indium-tin-oxide (ITO) and indium-zinc-oxide (IZO).

As shown in FIG. 3B, an E-ink film composed of a charging layer including positive and negative charged particles is attached to the top of the first electrode.

In general, the attachment process is performed by a roll method using a roller.

At this time, the bubble-ink film 200 itself may be coated with an adhesive having conductivity, or the bubble-ink film 200 may be adhered using an adhesive having a different conductive property.

The process of attaching the second substrate 300 on which the plurality of second electrodes 302 are formed is attached to the first substrate 100 on which the e-ink film 200 is attached, as shown in FIG. 3C do.

At this time, the second substrate 300 may be formed using a transparent material having anisotropic conductive properties, and in particular, may be formed using a conductive polymer.

The second electrode 302 is characterized in that a plurality of pieces patterned in 탆 units are spaced apart from each other. This is because only the second electrode 302 corresponding to the movement path of the electronic pen (400 in FIG. 2) is polarized so that a desired text and a picture can be drawn.

By further configuring the electronic pen on the e-ink board configured as described above, the e-ink board can be completed.

Therefore, when the electrophoretic method according to the present invention uses a black ink board, it is not necessary to use a consumable part or the like because it can replace a black board or a white board, It is possible to reduce the environmental pollution and the like.

Claims (11)

A first substrate; A first electrode formed on a front surface of the first substrate; A charge layer formed on the first electrode and formed of a charged particle; A transparent second substrate formed on the upper portion of the charge layer; A second electrode formed on a surface of the second substrate facing the charge layer, the first electrode and the second electrode being spaced apart from each other; An electronic pen which moves in contact with a surface of the second substrate; A power source connected to the electronic pen and the first electrode In-board. The method according to claim 1, Wherein the charge layer comprises a plurality of capsule aggregates encapsulated by a polycondensation reaction between a black dye and a white dye which are charge carriers having opposite polarities. 3. The method of claim 2, Wherein when a voltage is applied to the first electrode and the electronic pen, the first electrode has a positive polarity and the electronic pen has a negative polarity. The method according to claim 1, Wherein the second substrate has a conductive property in an up-down direction. 5. The method according to any one of claims 1 to 4, Wherein the charged particles move up and down by a first electrode having a positive polarity and a second electrode having a negative polarity by the electronic pen. The method according to claim 1, Wherein the portion of the electronic pen which is in contact with the second substrate has conductivity. Preparing first and second substrates; Forming a first electrode on a front surface of the first substrate; Attaching a charge layer formed of a charged particle to an upper portion of the first electrode; Forming a second electrode composed of a plurality of pieces spaced apart from the second substrate; A first substrate including the first electrode and a charge layer, and a second substrate including the second electrode; Connecting the first electrode and a separate electronic pen to a power source Wherein the ink-receiving layer is formed on the substrate. 8. The method of claim 7, Wherein the charge layer comprises a plurality of capsule aggregates encapsulated by a condensation polymerization reaction between a black dye and a white dye, which are charge carriers having polarities opposite to each other. 8. The method of claim 7, Wherein the second substrate has a conductive property in an up-down direction. 10. The method according to any one of claims 7 to 9, Wherein the charged particles move up and down by the first electrode having a positive polarity and the second electrode having a negative polarity by the electronic pen. 8. The method of claim 7, Wherein the portion of the electronic pen contacting the second substrate has conductivity.

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