KR101718907B1 - Light emitting paper device using a triboelectric power - Google Patents

Abstract

According to the present invention, in a light emitting paper device using triboelectric generation, an organic light emitting layer is formed between two paper substrates having electrodes coated thereon. A triboelectric generator is formed on one side of the lower paper substrate so that the organic light emitting layer emits light by an induced current generated from the triboelectric generator when triboelectric generation occurs. Therefore, letters written on paper can be read even in dark places.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a luminescent paper element using contact electrification,

The present invention relates to a light emitting device using contact electrification, and more particularly, to an organic electroluminescent layer formed between two paper substrates each coated with an electrode, and a contact electrification generator mounted on one side of a lower paper substrate, And a method of manufacturing the same. BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a luminescent paper element using a contact electrification power source, and more particularly, to a luminescent paper element using a contact electrification power generator.

In recent years, new energy harvesting technologies have attracted great attention due to the problems of continuous energy exhaustion and environmental pollution caused by conventional fossil fuels.

One of these new energy harvesting technologies is attracting attention to contact generator generators that convert mechanical energy into electrical energy. In this contact generator, different charging materials come into contact with each other due to the external mechanical action, Electrical energy is generated repeatedly.

That is, in the contact charging generator, a potential difference occurs between the electrodes connected to the materials by the electrostatic charges induced in the positive and the negative directions, respectively, when the two materials are in contact with each other. An induced current is generated.

An organic light emitting diode (OLED) is a self-luminous organic light emitting device that emits light by using an electroluminescent phenomenon that emits light when a current flows through a fluorescent or phosphorescent organic compound. It is used to illuminate the light behind the LCD.

Figure 1 shows a cross-sectional view of a conventional OLED panel in which the OLED panel can be composed of a fluorescent material 104 sandwiched between two thin electrodes 100 and 102 and one of the two electrodes 100 and 102 Is transparent so that it can be used as a display screen. At this time, the free electrons accelerated by the electric field excite the active electron of the luminescent center in the fluorescent material 104, and the exciton thus formed emits light of a specific wavelength when it returns to its original state.

At this time, the organic compounds capable of implementing the OLED as described above are now widely used as auxiliary liquid crystals in cellular phones and PDAs. In addition, some compounds can be used on a wide and thin surface like a film, and they do not require a complicated mechanical device, and because they emit light when electricity is applied, they are attracting attention for use in various display devices currently in common use.

Therefore, it is expected that various light emitting devices and display devices which are more environmentally friendly than the case where the contact charging power generator and the self light emitting type organic light emitting device such as OLED are combined.

(Patent Literature)

Korean Patent Publication No. 10-2011-0132758 (published on December 09, 2011)

Accordingly, in the present invention, an organic light emitting layer is formed between two paper substrates coated with electrodes, and a contact charging power generator is implemented on one side of the lower paper substrate, and by the induced current generated from the contact charging power generator The present invention provides a light emitting paper element using a contact electrification power generator capable of reading characters written on paper even in a dark place by causing the organic light emitting layer to emit light, and a manufacturing method thereof.

The above-described present invention is a light emitting paper element using contact electrification power generation, comprising: a first paper substrate; a first electrode formed on one side of the first paper substrate; a second paper substrate; An organic light emitting layer disposed between the first electrode and the second electrode and attached to the first electrode and the second electrode;

A contact charging electric generator attached to the other surface of the first paper substrate for generating contact charging by external physical stimulation and supplying an induced current generated by the contact charging to the first electrode and the second electrode, .

The contact charging power generator includes a paper substrate layer, a metal layer formed on the paper substrate layer, and a polymer layer formed on the metal layer, wherein the paper substrate layer is attached to the first paper substrate, And the contact charging is generated between the polymer layer and the metal layer when friction occurs between the polymer layer and the metal layer by the physical stimulation.

In addition, the first electrode is formed of a conductive material that reflects light emitted from the organic light emitting layer.

The first electrode may be formed of any one of gold (Au), silver (Ag), aluminum (Al), chrome (Cr), and nickel (Ni).

In addition, the second electrode is formed of a conductive material that transmits light emitted from the organic light emitting layer.

According to another aspect of the present invention, there is provided a method of manufacturing a light emitting paper element, comprising the steps of: forming a first electrode for reflecting light on one side of a first paper substrate; forming a first electrode for reflecting light on one side of the second paper substrate; Forming an organic electroluminescent layer between the first electrode and the second electrode; forming a contact charging generator that generates contact electrification by external physical stimulation on the other surface of the first paper substrate; .

Further, the step of forming the contact charging electric power generator includes the steps of forming a paper substrate layer, forming a metal layer on the paper substrate layer, and forming a polymer layer on the metal layer .

According to the present invention, in the light emitting paper element using contact electrification power generation, an organic light emitting layer is formed between two paper substrates each coated with an electrode, and a contact electrification generator is implemented on one side of a lower paper substrate, The organic electroluminescent layer is caused to emit light by the induction current generated from the contact-type electrification generator, thereby being able to read characters written on paper even in a dark place.

1 is a cross-sectional view of a conventional OLED panel,
FIG. 2 is a cross-sectional view of a light emitting paper element using contact electrification power generation according to an embodiment of the present invention,
3 is a cross-sectional view of a contact charging power generator according to an embodiment of the present invention,
4 is an exemplary positional view of a positively or negatively charged electrification generator according to an embodiment of the present invention,
5 is a conceptual diagram showing an induction current generated in a contact charging generator according to an embodiment of the present invention.

Hereinafter, the operation principle of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and these may be changed according to the intention of the user, the operator, or the like. Therefore, the definition should be based on the contents throughout this specification.

2 is a cross-sectional view of a light emitting paper element using contact electrification power generation according to an embodiment of the present invention. Hereinafter, the manufacturing process and operation of the light emitting paper element using the contact charging power generation will be described in detail with reference to FIG.

First, a first electrode 202 is formed on a first paper substrate 200 made of a paper material. At this time, the first electrode 202 may be formed on the first paper substrate 200 through a vacuum deposition method, but the present invention is not limited thereto. The first electrode 202 may be formed of a conductive material that reflects light. The conductive material may include, for example, gold (Au), silver (Ag), aluminum (Al), chromium (Cr) (Ni), and the like, but the present invention is not limited thereto.

Next, the second electrode 206 is formed on the second paper substrate 204 made of a paper material. At this time, the second electrode 206 may be formed on the second paper substrate 204 through a vacuum deposition method, but the present invention is not limited thereto.

When the first paper substrate 200 and the second paper substrate 204 having the first electrode 202 and the second electrode 206 formed as described above are manufactured, the first electrode 202 and the second electrode 206 And the contact charging power generator 210 is attached to one side of the first paper substrate 200 to complete the light emitting paper element.

The organic light emitting layer 208 may be a self light emitting organic light emitting material that emits light by using an electroluminescent phenomenon that emits light when a current flows through a fluorescent or phosphorescent organic compound.

In addition, in the light emitting paper element thus completed, the first paper substrate 200 may be the lower side paper of the light emitting paper element, and the second paper substrate 204 may be the upper side paper of the light emitting paper element. Therefore, when the organic electroluminescent layer 208 emits light due to the application of a current induced from the contact electrification generator 210 to the first electrode 202 and the second electrode 206, It is possible to emit the second paper substrate 204, which is reflected by the first electrode 202 and filled with information such as characters.

That is, in the present invention, a first paper substrate 200 and a second paper substrate 204 coated with a first electrode 202 and a second electrode 206 formed of aluminum and ITO, respectively, and an organic light emitting diode The organic light emitting layer 208 is positioned between the first paper substrate 200 and the second paper substrate 204 and then the contact charging electrification A physical stimulus is applied to the generator 210.

As a result, contact charging occurs in the contact charging device 210 by physical stimulation, and an induced current generated by the occurrence of contact charging is applied to the first paper substrate 200 through the wirings 220 and 222, The second electrode 202 of the second paper substrate 204 and the second electrode 206 of the second paper substrate 204 are caused to flow an alternating current between the first electrode 202 and the second electrode 206, The organic emission layer 208 positioned between the organic emission layer 208 and the organic emission layer 206 emits light.

At this time, the light emitted from the organic light emitting layer 208 is reflected by the first electrode 202 and illuminates the second paper substrate 204, thereby reading characters written on the second paper substrate 204 in a dark place .

FIG. 3 is a cross-sectional view of the contact charging power generator according to the embodiment of the present invention. The manufacturing process and operation of the contact charging power generator will be described in detail with reference to FIG.

3, the contact charging power generator 210 includes a polymer layer 300, a metal layer 302, a paper substrate 302, Layer 304, and the like. The contact charging power generator 210 may be formed by sequentially forming the metal layer 302 and the polymer layer 300 on the paper substrate 304.

The polymer layer 300 is a device for generating contact charging in the contact charging electric generator 210. Since more negative charges are induced by the contact charging phenomenon with the metal layer 302, desirable. In addition, it is preferable to use a material having high flexibility for adhering to paper, and such a material having high flexibility may be used, for example, but not limited to, a kapton film. In addition, the polymer layer 300 may be formed by attaching a tape made of a polymer material on the metal layer 302.

The metal layer 302 is preferably made of a material located above the charging column so as to induce more positive charge during contact charging. The material for the metal layer 302 may be, for example, gold (Au), copper (Cu), aluminum (Al), chrome (Cr) or nickel (Ni)

The paper substrate 304 may be formed of the same paper material as the first paper substrate 200 and may be in contact with the metal layer 302 when contact charging occurs between the polymer layer 300 and the metal layer 302 on the contact charging power generator 210. [ And serves as an intermediary for transferring the induced current generated through charging to the first paper substrate 200.

At this time, the position where the contact charging power generator 210 composed of the polymer layer 300, the metal layer 302, the paper substrate layer 304, and the like is attached to the first paper substrate 200 is determined by printing characters or the like But may be a region for applying a physical stimulus such as a user touching a finger to generate contact charging.

4, the area of the contact charging power generator 210 may be relatively small compared to the area of the first paper substrate 200, and there is no problem in contacting the fingers or the like Size can be set.

FIG. 5 illustrates a concept in which an induced current is generated in a contact charging generator according to an embodiment of the present invention.

Hereinafter, an operation of generating the induced current in the contact charging generator 210 will be described with reference to FIG.

5 (a), the user presses or contacts the polymer layer 300 of the contact charging power generator 210 by using the skin 500 of a finger or the like to generate the induced current, Physical stimulation is applied to the layer 300.

Accordingly, when the above-mentioned physical stimulation is generated, surface charge is generated by the charge opposite to the surface of the skin 500 and the polymer layer 300 due to the difference in charging heat between the skin 500 and the polymer layer 300 do.

5 (b), when separating the skin 500 from the polymer layer 300, which has been in contact with the polymer layer 300 by, for example, removing a finger, the surface of the polymer layer 300 The electric charge generated in the metal layer 302 is transferred to the metal layer 302 and the electric current flows.

5 (c), when the skin 500 separated from the polymer layer 300 approaches the polymer layer 300 again, the distance between the skin 500 and the polymer layer 300 Surface charges are generated by charges opposite to the surfaces of the skin 500 and the polymer layer 300 due to the charge difference.

5 (d), when the skin 500 is close to the polymer layer 300 so that the distance between the skin 500 and the polymer layer 300 is within a predetermined distance, The charge on the surface moves to the polymer layer 300 and current flows in the opposite direction.

Therefore, alternating current can be induced when the operation of repeatedly contacting and separating the skin 500 of the finger or the like with the polymer layer 300 is repeated.

As described above, according to the present invention, in the light emitting paper element using the contact electrification power generation, an organic light emitting layer is formed between two paper substrates each coated with an electrode, and a contact charging power generator is implemented on one side of the lower paper substrate The organic electroluminescent layer is caused to emit light by the induction current generated from the contact electrification generator when the electrification occurs in the contact electrification, so that the letters written on the paper can be read even in the dark place.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should not be limited by the described embodiments but should be defined by the appended claims.

200: first paper substrate 202: first electrode
204: second paper substrate 206: second electrode
208: organic light emitting layer 210: contact charging generator
300: polymer layer 302: metal layer
304: Paper substrate layer

Claims (7)

A first paper substrate,
A first electrode formed on one surface of the first paper substrate,
A second paper substrate,
A second electrode formed on one side of the second paper substrate,
An organic light emitting layer disposed between the first electrode and the second electrode and attached to the first electrode and the second electrode;
A contact charging electric generator attached to the other surface of the first paper substrate for generating contact charging by external physical stimulation and supplying an induced current generated by the contact charging to the first electrode and the second electrode, ≪ / RTI &
The contact charging power generator includes:
A paper substrate layer,
A metal layer formed on the paper substrate layer,
And a polymer layer formed on the metal layer,
Wherein the paper substrate layer is attached to the first paper substrate,
And the contact electrification is generated between the polymer layer and the metal layer by the physical stimulation.
delete The method according to claim 1,
Wherein the first electrode comprises:
And a conductive material for reflecting light emitted from the organic light emitting layer.
The method of claim 3,
Wherein the first electrode comprises:
Wherein the light emitting element is formed of any one of gold (Au), silver (Ag), aluminum (Al), chromium (Cr), and nickel (Ni).
The method according to claim 1,
Wherein the second electrode comprises:
And a conductive material that transmits light emitted from the organic light emitting layer.
Forming a first electrode for reflecting light on one side of the first paper substrate,
Forming a second electrode for transmitting the light on one side of the second paper substrate;
Forming an organic light emitting layer between the first electrode and the second electrode;
And forming a contact charging generator which generates contact charging on the other surface of the first paper substrate by external physical stimulation,
The step of forming the contact charging electric generator includes:
Forming a paper substrate layer;
Forming a metal layer on the paper substrate layer;
Forming a polymer layer on the metal layer
Wherein the light emitting device comprises a light emitting layer.
delete

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