KR20090034248A - Manufacturing method of luminescence panel with decoration figure for electric homeappliances and luminescence panel thereof - Google Patents

Abstract

A method of manufacturing luminescence panel with decoration figure for electric homeappliances and luminescence panel thereof are provided to see the external appearance of the electronics at the nighttime by using the panel having the specific design pattern on the rear side of light-emitting panel. The print pattern is formed in the backside of the panel by the silk screen method. The light-transmitting part with which the paint is not coated is formed. The transparent first electrode is formed along the concavo-convex of the panel backside. The fluorescent material layer and the dielectric layer are formed by using the mixed paste of high dielectric constant polymer, phosphor powder and dielectric powder. The second electrode of the conductive oxide is formed on the rear side of the dielectric layer. The protective layer is formed on the rear side of the second electrode layer.

Description

Manufacturing method of luminescence panel with decoration figure for electric homeappliances and luminescence panel

The present invention relates to a method of manufacturing a light emitting panel for home appliances having a pattern and a light emitting panel using the same, and more particularly, to the front surface of the home appliance, the inorganic EL on the back of the panel to highlight the beauty of the appearance at night. It relates to a method of manufacturing a light emitting panel for home appliances having three-dimensionally formed and a light emitting panel using the same.

In general, due to the improvement of technology and the increase of income, the importance or importance of design rather than technical aspect is increasing in home appliances and furniture.

Recently, many household appliances of the so-called nude design line that show the inside of the product are introduced, which is an example of this trend.

Therefore, the recent home appliances have a simple design such as white or black, and in recent years, a variety of colorful colors or beautiful decorative patterns are introduced from the outside of the trend of home appliances.

In this case, a pattern or color is provided on a panel of transparent materials such as glass, tempered glass, and acrylic, which are attached to the outside of the home appliance.

Among them, tempered glass has no fear of breakage when moving, and it can have various and beautiful appearances such as various colors and patterns in addition to clear and transparent products. It is widely used as an exterior finishing material for furniture such as dressers, cabinets and sinks.

Conventionally, a method of spray coating on a back surface of tempered glass or the like or a printing method is applied to the glass to provide a pattern or color.

In addition, the transfer paper containing the desired pattern on the back of the tempered glass was sometimes provided with a pattern or color.

However, when the design is implemented in the tempered glass by the above method, there is a problem in that the design is not visible in a dark place or at night, and thus does not have the intended function.

The present invention was created to improve the above problems, and after forming a three-dimensional pattern of a specific pattern on the back of the panel so that various colors or patterns can be applied, the inorganic EL corresponding to the three-dimensional shape of the pattern The purpose of the present invention is to provide a method for manufacturing a light emitting panel for home appliances and a light emitting panel using the same.

Method for manufacturing a light emitting panel for home appliances having a pattern of the present invention for achieving the above object is a printed pattern portion printed by embossing a specific pattern pattern by applying a coating on the back of the panel to be mounted on the home appliance in a silk screen method And a panel preparation step of forming a light transmitting part not coated with paint; A first electrode layer forming step of forming a transparent first electrode along the uneven surface of the panel; A phosphor layer and a dielectric layer forming step of forming a phosphor layer and a dielectric layer by using a paste of a phosphor powder or a dielectric powder and a high dielectric constant polymer on a rear surface of the first electrode layer; A second electrode layer forming step of forming a second electrode of the conductive oxide on a rear surface of the dielectric layer; And a protective layer forming step of forming a protective layer on a rear surface of the second electrode layer.

The first and second electrodes are ZnO doped with Al and SnO ₂ doped with Sb. It is characterized in that any one selected from the conductive oxide formed by the screen printing method.

In the preparing of the panel, the method may further include forming a color filter layer on the light transmitting part.

And a light emitting panel for home appliances having a pattern is applied to the back surface by applying a coating in a silk-screen printing pattern pattern embossed with a specific pattern pattern, a light-transmitting part is not coated paint is formed and mounted on the home appliance; Al-doped ZnO and Sb-doped SnO ₂ along the uneven surface of the panel A first electrode layer formed of any one of conductive oxides, a phosphor layer and a dielectric layer stacked on a rear surface of the first electrode layer, a second electrode layer formed of the conductive oxide on a rear surface of the dielectric layer, and a rear surface of the second electrode layer And an inorganic EL portion having a protective layer forming a protective layer.

According to the manufacturing method of the light emitting panel for home appliances having the pattern of the present invention as described above and the light emitting panel using the same, since the light emitted from the inorganic EL is emitted to the front through the panel in which the pattern of the specific pattern is formed in three dimensions Color or pattern can be applied in various ways and can make the appearance of home appliances beautiful at night.

In addition, when the inorganic EL is three-dimensionally formed, the phosphor layer and the dielectric layer of the bent portion may be damaged or the first and second electrode layers may be short-circuited.

Hereinafter, a method of manufacturing a light emitting panel for home appliances having a pattern according to a preferred embodiment of the present invention and a light emitting panel using the same will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a state in which a light emitting panel for a home appliance having a pattern according to an embodiment of the present invention is attached to a home appliance, and FIG. 2 is a perspective view showing a printing pattern portion formed on the rear surface of the panel of FIG. 1, 3 is a cross-sectional view of the panel of FIG. 1, and FIG. 4 is a block diagram illustrating a method of manufacturing the panel of FIG. 1.

1 to 3, the light emitting panel 10 for home appliances having a pattern according to an embodiment of the present invention is attached to the front of the home appliances such as air conditioners (5) to emit light at night to improve the beauty of the appearance Let's do it.

The light emitting panel 10 is coated with a silkscreen method on the back surface to form a printed pattern portion 30 is embossed with a specific pattern pattern and a light-transmitting portion 35 is not applied to the paint is formed on the home appliance A panel and ZnO doped with Al and SnO ₂ doped with Sb along the uneven surface of the panel The first electrode layer 41 formed of any one of the selected conductive oxide, the phosphor layer 42 and the dielectric layer 43 stacked on the back of the first electrode layer 41, and the back of the dielectric layer 43 An inorganic EL portion 40 having a second electrode layer 44 formed of a conductive oxide and protective layers 45 and 46 for forming a protective layer on the rear surface of the second electrode layer 44 is provided.

Inorganic EL, called inorganic electroluminescence (Inorganic Electro Luminescence), is a type of display using a phenomenon in which light is emitted by doping impurities in a light emitting body, and the doped impurities collide with input acceleration electrons.

Inorganic EL can obtain an even light emission luminance with the power consumption of about 1/15 of the light emitting diode, it is possible to implement and design a variety of colors, there is an advantage that the volume is relatively large.

As an embodiment of the present invention, a panel was used as tempered glass 20. This reflects the property of being used as exterior finishing materials for home appliances and furniture, because it has durability that is not easily broken or scratched. In addition to the tempered glass 20 can be used glass or acrylic of a transparent material, of course.

The back surface of the tempered glass 20 is coated with a silk-screen method to form a print pattern portion 30 is embossed with a specific pattern pattern, and a light-transmitting portion 35 is not coated.

Therefore, the printed pattern portion 30 is formed to protrude from the back of the tempered glass 20 by the thickness of the coating layer is applied to print a specific pattern. In the illustrated example, the background of the flower is printed by the print pattern unit 30. However, although not shown, the flower may be printed by the print pattern unit.

Although not shown, a color filter layer may be formed on the rear surface of the tempered glass 20 to give various colors to the light emitted from the inorganic EL part 40.

On the back of the tempered glass 20 is composed of a transparent conductive film (ITO: Indium-Tin Oxide) to emit the light generated from the phosphor layer 42 to the outside and formed on the front transparent first electrode layer 41, A phosphor layer 42 formed on a rear surface of the first electrode layer 41 and composed of a phosphor and a binder to generate power by receiving power, and a dielectric and a binder formed on the back surface of the phosphor layer 42. A back electrode which is composed of an insulating layer between the second electrode layer 41 and the second electrode layer 44 and a dielectric layer 43 for inducing smooth light emission of the phosphor, and an electrode for supplying power together with the first electrode layer 41. The inorganic EL portion 40 having the second electrode layer 44 and the protective layers 45 and 46 formed on the rear surface of the second electrode layer 44 is formed.

The inorganic EL portion 40 having the above structure is formed three-dimensionally along the unevenness of the back surface of the tempered glass 20 formed three-dimensionally.

The first electrode layer 41 and the second electrode layer 44 are ZnO doped with Al and SnO ₂ doped with Sb. It is formed of any one selected from the conductive oxide, the terminal is connected to the first electrode layer 41 and the second electrode layer 44 to receive power from the inverter.

The inverter is connected to a power source for operating the air conditioner and supplies an alternating current having a predetermined voltage to the inorganic EL unit 40. The voltage for causing the inorganic EL portion 40 to emit light is 80 to 120 V, and the frequency is set to be 350 to 1200 Hz.

The protective layer is to protect the inorganic EL portion 40 from the outside, and may be formed by screen printing or depositing the conductive protective layer 45 and the insulating protective layer 46 on the rear surface of the second electrode layer 44. In addition, a protective laminate film may be attached to the rear surface of the second electrode layer 44.

Attached to the front of the air conditioner (5) that can be applied in a variety of colors or patterns as described above to supply power to the inorganic EL unit 40 to emit light to enhance the beauty of the appearance of home appliances at night Can be.

In this case, the light emitted from the inorganic EL portion 40 to the front surface of the tempered glass 20 through the printing pattern portion 30 has a soft effect by the paint. And the light emitted through the transparent portion 35 to the front of the tempered glass 20 forms a flower pattern to improve the beauty of the appearance. In addition, when the light filter 35 is provided with a color filter layer, a flower pattern having various colors may be implemented.

Although not shown, a control unit may be configured to emit the inorganic EL unit 40 at night, thereby controlling the operation of the inverter. In addition, by installing an optical sensor on one side of the air conditioner 5, the control unit can of course control the operation of the inverter according to the ambient illumination.

On the other hand, the light emitting panel for home appliances having the pattern of the present invention is not limited to home appliances such as the air conditioner (5) described above can be used as an exterior finish of the furniture.

Hereinafter, a method of manufacturing a light emitting panel for home appliances having a pattern according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4.

In order to form the inorganic EL portion 40 to be applied to the present invention, the manufacturing method of the conventional inorganic EL sheet is different. This is because when the conventional inorganic EL sheet is formed three-dimensionally on the rear surface of the three-dimensional tempered glass 20, there is a fear that the electric field stability between the electrodes and the electronic function between the phosphor and the dielectric in the bent portion may be lost.

First, a step 70 of preparing the tempered glass 20 to be attached to the front of the air conditioner (5) is performed.

And a printing pattern forming step of forming a printing pattern portion 30 having a specific pattern pattern embossed by applying a paint on the back surface of the tempered glass 20 and a light transmitting portion 35 having no coating applied thereto. Perform 80.

Here, silk screen is one of the printing techniques commonly used. It is a method of printing a pattern of a specific pattern by making a stencil in the form of a specific pattern, placing a silk on it, and allowing the paint to leak out with a silk mesh.

Forming a printing pattern portion 30 coated with a paint on the back surface of the tempered glass 20 and a light-transmitting portion 35 not coated with a silk screen method, and then forming an inorganic EL portion 40 as described above. Perform 100.

Meanwhile, before forming the inorganic EL part, the step of forming the color filter layer on the rear surface of the tempered glass of the light transmitting part may be further performed.

The first electrode layer forming step 110 of forming the first electrode layer 41 on the back surface of the tempered glass on which the printed pattern portion and the light transmitting portion are formed is performed. The first electrode layer performs a paste manufacturing step using isopropylene as the main solvent using a powder-type conductive oxide selected from Al-doped ZnO and Sb-doped SnO ₂ .

In addition, a printing step of forming a first electrode layer by silk printing the paste on the back surface of the tempered glass is performed.

In the silk printing step, the screen plate is preferably 350 micron fine and soft squeeze, and the conductivity of the paste for forming the first electrode layer is 103 S / cm or more to improve the stability of the electric field It is desirable to be able to secure. As described above, when using fine screen engraving of 35O mesh or more on the screen, it is possible to prevent the mesh of the platen from being left on the printed electrode.

When the silk printing of the first electrode layer is completed, it is dried. When the drying is completed as described above, the phosphor layers and the dielectric layer steps 120 and 130 for forming the phosphor layer 42 and the dielectric layer 43 are performed.

The phosphor layer 42 and the dielectric layer 43 are formed by preparing a paste for forming a phosphor layer by mixing phosphor powder, a resin and a solvent, and preparing a paste for forming a dielectric layer by mixing a dielectric powder, a resin and a solvent, respectively. And a silk printing step on the upper surface of the first electrode layer.

In mixing the phosphor powder to produce the phosphor paste, the lower the viscosity of the dielectric layer and the binder of the phosphor layer, the higher the density, the better the electric field function. However, high density means that the phosphor powder is more than the resin and the solvent.

For this purpose, the ratio of the resin and the solvent to the phosphor powder is preferably set to about 7: 3 weight percent (Wt%). In this case, the printability is relatively inferior. In order to prevent this, it is preferable to mix the dispersion (dissolution) accelerator and to use a screen squeegee of 150 mesh and a soft squeegee (65shore).

The dispersion promoter is to activate the dispersion (dissolution) of the powder while reducing the amount of binder compared to the powder, it is preferable to use an unsaturated polycarboxylic acid (polycarboxylic acid) polymer.

In order to prevent the pinhole phenomenon of the phosphor or the dielectric, the dispersant may be added to the binder itself to improve the printability while increasing the density, so that the thickness of the phosphor and the dielectric layer may be printed so that the thickness of the phosphor and the dielectric layer may be prevented.

After the formation of the phosphor layer 42 and the dielectric layer 43 as described above, the second electrode layer forming step of forming the second electrode layer 44 on the back thereof in the same manner as the method of forming the first electrode layer 41 described above. Perform 140.

The conductive protective layer forming step 150 and the insulating protective layer forming step 160 are formed by screen printing or depositing the conductive protective layer 45 and the insulating protective layer 46 on the upper surface of the second electrode layer 44. do.

The inorganic EL manufactured in three-dimensional manner as described above may be tunnel-emitted according to the voltage applied by the trapped electrons at the interface level of the phosphor of the phosphor layer 42 and the polymeric matrix surrounding the phosphor. Tunneling of the electrons into the conduction band of the phosphor doped with the activator when the intensity of the electric field, that is, the threshold voltage or more, is started.

These electrons are accelerated under the electric field applied inside the phosphor conduction band to obtain enough energy to excite the emission center, and then directly collide with the outermost electrons of the emission center ion to excite the bottom. Light is emitted while being relaxed to the ground state.

Although the present invention has been described with reference to the embodiments illustrated in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments thereof are possible.

Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

1 is a perspective view showing a state in which a light emitting panel for a home appliance having a pattern according to an embodiment of the present invention is attached to a home appliance;

FIG. 2 is a perspective view illustrating a printing pattern portion formed on a rear surface of the panel of FIG. 1;

3 is a cross-sectional view of the panel cut along the line A-A of FIG.

4 is a block diagram illustrating a method of manufacturing the panel of FIG. 1.

<Description of the symbols for the main parts of the drawings>

10: light emitting panel 20: tempered glass

30: printed pattern portion 35: light transmitting portion

40; Inorganic EL part 41: First electrode layer

42: phosphor layer 43: dielectric layer

44: second electrode layer

Claims (4)

A print pattern forming step of applying a paint on the back surface of the panel to be mounted on the home appliance to form a print pattern portion in which a specific pattern is embossed and a light transmitting portion not coated on the paint; A first electrode layer forming step of forming a transparent first electrode along the uneven surface of the panel; A phosphor layer and a dielectric layer forming step of forming a phosphor layer and a dielectric layer by using a paste of a phosphor powder or a dielectric powder and a high dielectric constant polymer on a rear surface of the first electrode layer; A second electrode layer forming step of forming a second electrode of the conductive oxide on a rear surface of the dielectric layer; And a protective layer forming step of forming a protective layer on a rear surface of the second electrode layer. The method of claim 1, The first and second electrodes are ZnO doped with Al and SnO ₂ doped with Sb. Method for manufacturing a light emitting panel for home appliances having a pattern, characterized in that any one selected from the conductive oxide of the screen printing method. The method of claim 1, In the panel preparation step, The method of manufacturing a light emitting panel for home appliances having a pattern, characterized by further comprising the step of forming a color filter layer on the light transmitting portion. A panel on which the coating pattern is coated on the back by a silk-screen method and a printed pattern portion on which a specific pattern is embossed is printed, and a light-transmitting portion on which the coating is not applied is formed and mounted on a home appliance; Al-doped ZnO and Sb-doped SnO ₂ along the uneven surface of the panel A first electrode layer formed of any one of conductive oxides, a phosphor layer and a dielectric layer stacked on a rear surface of the first electrode layer, a second electrode layer formed of the conductive oxide on a rear surface of the dielectric layer, and a rear surface of the second electrode layer An inorganic EL unit having a protective layer forming a protective layer in the;

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