KR20120070451A - Transparent display board and method for manufacturing the same - Google Patents

Abstract

PURPOSE: A transparent display board and a manufacturing method thereof are provided to omit a patterning process for forming an electrode by forming the electrode on a concave part. CONSTITUTION: A transparent display board comprises a substrate(10), a concave part(10a) formed on the substrate, an electrode(20), and a light emitting device(30). The substrate is composed of glass, a transparent polymer, or frit glass. The substrate has one or more concave parts. The depth of the concave part is formed to be below 50% of the thickness of the substrate. An electrode can include CNT(Carbon Nanotube), a conductive polymer, and a silver nano wire. A light emitting device is formed into all kinds of light emitting devices like an LED(Light Emitting Diode), a laser diode, an organic EL, an LCD, and an FED(Field Emission Device).

Description

Transparent display board and manufacturing method thereof {TRANSPARENT DISPLAY BOARD AND METHOD FOR MANUFACTURING THE SAME}

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

Recently, transparent electronic displays have been used for lighting, indoor and outdoor billboards, signboards, and the like. Such a transparent electronic plate is formed by patterning electrodes on a glass substrate, and a light emitting element is connected between the electrodes. Since both ends of the electrode are connected to the anode and the cathode of the light emitting device, the light is emitted when the light emitting device is connected.

In order to pattern the electrode, various manufacturing processes are required, such as forming a mask and depositing an electrode material. Accordingly, there is a problem that the manufacturing process is complicated and the process cost increases. In addition, electrodes typically include indium tin oxide (ITO), which has the disadvantage of high cost and weight.

Accordingly, there is a need for an electrode material that can substitute for this and a transparent electronic display plate capable of forming an electrode in a simple process using such an electrode material.

The embodiment is to provide a transparent electronic display board and a method of manufacturing the same that can simplify the manufacturing process and reduce the process cost.

In one embodiment, a transparent electronic display includes a substrate including at least one concave portion; An electrode formed in the recess; And a light emitting device electrically connected to the electrode.

According to one or more exemplary embodiments, a method of manufacturing a transparent display board includes preparing a substrate; Forming a recess in the substrate; Forming an electrode in the recess; And mounting a light emitting device on the substrate to be electrically connected to the electrode.

In the transparent display board according to the embodiment, since the recess is formed in the substrate and the electrode is formed in the recess, the patterning work for forming the electrode can be omitted. This can reduce the manufacturing process and manufacturing costs. In addition, when the electrode is formed in the recess, it may be formed of another alternative electrode material that can replace the existing indium tin oxide.

In the method of manufacturing a transparent display board according to the embodiment, the transparent display board of the above-described form may be formed by a simple printing process using a substitute electrode material.

1 is a schematic cross-sectional view of a transparent display board according to an embodiment.
2 to 6 are cross-sectional views illustrating steps of a method of manufacturing a transparent display board according to an embodiment.
7 is a planar photograph of a recess formed in an actual substrate.
8 is a planar photograph of an electrode formed in a recess.

In the description of embodiments, each layer, region, pattern, or structure may be “on” or “under” the substrate, each layer, region, pad, or pattern. Substrate formed in ”includes all formed directly or through another layer. Criteria for the top / bottom or bottom / bottom of each layer will be described with reference to the drawings.

The thickness or the size of each layer (film), region, pattern or structure in the drawings may be modified for clarity and convenience of explanation, and thus does not entirely reflect the actual size.

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

Referring to Figure 1 will be described in detail a transparent display board according to an embodiment. 1 is a schematic cross-sectional view of a transparent display board according to an embodiment.

Referring to FIG. 1, the transparent display board according to the embodiment includes a substrate 10, a recess 10a formed in the substrate 10, an electrode 20, and a light emitting element 30.

The substrate 10 is made of glass, transparent polymer, frit glass, or the like. In this case, the substrate 10 is preferably made of a transparent polymer to have flexibility.

At least one concave portion 10a may be formed in the substrate 10. The depth of the recess 10a may be formed to be 50% or less of the thickness of the substrate 10. When the depth of the concave portion 10a exceeds 50% of the thickness of the substrate 10, the physical strength of the substrate 10 may be weakened at this portion by the concave portion 10a formed in the substrate 10.

The concave portion 10a may have the same shape as that of the electrode 20 to be formed on the substrate 10. That is, the shape of the recessed portion 10a soon becomes the shape of the electrode 20.

Subsequently, an electrode 20 is formed in the concave portion 10a of the substrate 10. The electrode 20 may include carbon nanotubes (CNTs), conductive polymers, and silver nanowires. It is a material that can replace the existing indium tin oxide (ITO), which is advantageous in terms of cost and can be formed by a simple process. Conventionally, when forming an electrode from indium tin oxide, it was formed by a deposition method using a mask to form an electrode pattern. However, in this embodiment, since the electrode 20 is formed in the concave portion 10a formed in the substrate 10, such a vacuum deposition process can be omitted. In addition, since the electrode 20 is formed in the recess 10a of the substrate 10, the electrode 20 may be prevented from being corroded or damaged by an external environment.

The light emitting device 30 may be any type of light emitting device capable of emitting light such as a light emitting diode (LED), a laser diode, an organic EL, a liquid crystal device (LCD), a field emission device (FED), or the like. have.

Hereinafter, a method of manufacturing the transparent display board according to the embodiment will be described with reference to FIGS. 2 to 6. For the sake of clarity and simplicity, the same or very similar parts to those described above will be omitted, and the different parts will be described in detail.

2 to 6 are cross-sectional views illustrating steps of a method of manufacturing a transparent display board according to an embodiment.

First, as shown in FIG. 2, a substrate 10 that can be applied to a transparent electronic display board is prepared.

3 and 4, the mask 100 is formed on the substrate 10 except for the electrode portion, and the recess 10a is formed by etching the portion except the mask portion. The depth of the recess 10a is etched to be 50% or less of the thickness of the substrate 10.

Next, as shown in FIG. 5, the electrode 20 is formed using a printing process. Specifically, the electrode material 20 may be filled in the recess 10a using the doctor unit 200. That is, the doctor unit 200 is positioned in contact with the substrate 10 and moves in the direction of the arrow shown in the drawing to fill the electrode material 20 in the recess 10a. Thus, the electrode material 20 may be a printable paste material instead of a conventional indium tin oxide. In one example, the electrode material 20 may include carbon nanotubes (CNTs), conductive polymers and Ag nano wire ink. As the conductive polymer, a material in which a transparent binder is added to PEDOT (poly (3,4-ethylenedioxythiophene)) which is a derivative of polythiopine may be used.

After such a printing process, it may include the step of firing the electrode 20 formed in the recess (10a).

Subsequently, as shown in FIG. 6, the light emitting device 30 may be mounted to be electrically connected to the electrode 20. That is, the electrodes 20 spaced apart by the recesses 10a formed in the substrate 10 are electrically connected by the light emitting device 30. The light emitting device 30 may be attached by a conductive adhesive (not shown). For example, the light emitting device 30 may be attached to an anisotropic conductive film (ACF) or a silver conductor (silver conductor or silver paste).

Hereinafter, with reference to FIG. 7 and FIG. 8, an embodiment actually applied will be described.

7 is a planar photograph of a recess formed in an actual substrate, and FIG. 8 is a planar photograph of an electrode formed in a recess. Specifically, the recess 10a may be formed in the substrate 10, and the electrode 20 may be formed in the recess 10a.

The features, structures, effects and the like described in the foregoing embodiments are included in at least one embodiment of the present invention and are not necessarily limited to one embodiment. In addition, the features, structures, effects, and the like illustrated in the embodiments may be combined or modified with respect to other embodiments by those skilled in the art to which the embodiments belong. Therefore, it should be understood that the present invention is not limited to these combinations and modifications.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the present invention. It can be seen that various modifications and applications are possible. For example, each component specifically shown in the embodiments may be modified. It is to be understood that the present invention may be embodied in many other specific forms without departing from the spirit or essential characteristics thereof.

10: Substrate
10a: concave
20: electrode (electrode material)
30: light emitting element

Claims (11)

A substrate comprising at least one recess;
An electrode formed in the recess; And
Light emitting device electrically connected to the electrode
Transparent display board comprising a. The method of claim 1,
And a depth of the recess is 50% or less of the thickness of the substrate. The method of claim 2,
The shape of the recess is the same as the shape of the electrode. The method of claim 1,
The electrode is a transparent electronic plate containing at least one material selected from the group consisting of carbon nanotubes (CNT), conductive polymers and silver nanowires (Ag nanowire). Preparing a substrate;
Forming a recess in the substrate;
Forming an electrode in the recess; And
And mounting a light emitting device on the substrate to be electrically connected to the electrode. The method of claim 5,
In the step of forming the recess, the depth of the recess is formed to 50% or less of the thickness of the substrate. The method of claim 6,
In the step of forming the recess, the shape of the recess is the same as the shape of the electrode to be formed transparent light plate manufacturing method. The method of claim 7, wherein
Forming the concave portion, the method of manufacturing a transparent display board comprising a photoresist process. The method of claim 5,
Forming the electrode, a transparent display board manufacturing method using a printing process. 10. The method of claim 9,
The forming of the electrode includes filling the recessed portion with an electrode material including a paste using a doctor unit. The method of claim 10,
The electrode material comprises a carbon nano tube (CNT), a conductive polymer and a silver nano wire ink (Ag nano wire ink) comprising at least one of the group consisting of at least one.

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