KR200452299Y1 - Half mirror electricfield division display device using electroluminescence - Google Patents

Abstract

The present invention relates to a half-mirror field split display device using an EL element which is simple in the manufacturing process, shortens the manufacturing time, enables field split light emission, and enables various dimming effects within a specific pattern.

Half-mirror field split display using the EL device according to the present invention is a transparent material layer; A UV printing layer printed on the back of the transparent material layer so that UV ink has a predetermined light emission pattern; A coating layer formed on a rear surface of the transparent material layer on which the UV printing layer is formed; An electroluminescent device layer formed on the back surface of the coating layer and configured of a plurality of individually controllable unit patterns so that a portion corresponding to the light emitting pattern of the UV printed layer emits light; An insulating layer formed on a rear surface of the electroluminescent element layer to protect the electroluminescent element layer; A half mirror formed on the entire surface of the transparent material layer; A human body sensor detecting a human body approaching the half mirror; And a power supply for controlling driving of the electroluminescent element layer according to the human body approach sensing information of the human body sensing sensor, wherein the power supply unit of the electroluminescent element layer is detected when the human body is detected by the human body sensing sensor. Stop the drive.

Description

Half-mirror field split display using electroluminescent device {HALF MIRROR ELECTRICFIELD DIVISION DISPLAY DEVICE USING ELECTROLUMINESCENCE}

The present invention relates to a half-mirror field split display device using an electroluminescent element, and in particular, a half using an EL element capable of simplifying a manufacturing process, shortening a manufacturing time, enabling field split light emission, and various dimming effects within a specific pattern. A mirror electric field division display apparatus is provided.

Electroluminescence (EL) devices are self-luminous devices that emit light from a phosphor by generating a displacement current using a dielectric as a medium when an electric field is formed between two electrodes. The device has a high frequency response speed, high luminous efficiency, and high luminance. There is an advantage.

There are many kinds of display devices using such EL elements, and among them, as shown in FIG. 1, display apparatuses for displaying a specific phrase or picture through the surface light-emitting body using the EL elements are widely used. .

The display device of FIG. 1 includes an EL element layer 40 formed on the rear surface of the transparent substrate 30, a rear protective cap 50 formed on the rear surface of the EL element layer 40, and a front surface of the transparent substrate 30. A printed circuit board 20, and a front protective substrate 10 disposed on the front surface of the printed board.

The EL element 40 includes a first electrode layer including a first electrode layer formed on the rear surface of the transparent substrate 30, a fluorescent layer formed on the rear surface of the first electrode layer, and a second electrode layer formed on the rear surface of the fluorescent layer. When a voltage is applied to the second electrode layer, an electric field is formed to generate light in the fluorescent layer, and the light is emitted to the outside through the transparent substrate 30, thereby performing surface emission.

The EL element 40 is protected by the rear protective cap 50 because it has the property of being easily deteriorated by gas and moisture.

The printed board 20 is a substrate on which the contents to be displayed are printed, and is printed using solvent ink, dye ink, pigment ink, or the like, and a transparent front protective substrate 10 is disposed on the front surface of the printed board 20. Protect the printed board 20.

In the conventional display device using the EL element, since the EL element 40 and the printed board 20 are formed separately and bonded to each other, the manufacturing process is complicated, which requires a long manufacturing time and a thick thickness. have.

In particular, the solvent ink used for printing takes a drying time of 7 minutes to 10 minutes after printing, it is impossible to express high resolution, there is a problem that is regulated as a toxic chemical. In addition, the dye ink and the pigment ink takes more than 10 minutes of drying time after printing, it is not possible to print other than the output of the dedicated material, there is a problem that can be used only indoors because it is an aqueous type.

For this reason, the display device using the conventional EL element will inevitably take a longer manufacturing time due to the drying time of the ink.

In addition, the conventional display device using the EL element has a disadvantage in that the production cost is further increased due to the need for a drying room in a large place, and the time loss is large due to transportation to the drying room.

In addition, in the conventional display device using the EL element, since the EL element 40 is disposed on the entire back surface of the printed board 20, electric field division light emission that emits only a desired portion in various ways is impossible.

Accordingly, an object of the present invention is to provide a half-mirror field split display using an EL element which is simple in the manufacturing process, shortens the manufacturing time, enables electric field split light emission, and enables various dimming effects within a specific pattern.

Another object of the present invention is to provide a half-mirror field split display device using a thin EL element.

In addition, the present invention includes a reflector layer and a glass layer to stop driving the EL element when the approach of the human body is detected within a predetermined distance, and to drive the EL element when the approach of the human body is not detected within the predetermined distance. Another object is to provide a half mirror electric field division display using the EL element.

In order to achieve the above object, the half-mirror field split display using the EL device according to the present invention is a transparent material layer; A UV printing layer printed on the back of the transparent material layer so that UV ink has a predetermined light emission pattern; A coating layer formed on a rear surface of the transparent material layer on which the UV printing layer is formed; An electroluminescent device layer formed on the back surface of the coating layer and configured of a plurality of individually controllable unit patterns so that a portion corresponding to the light emitting pattern of the UV printed layer emits light; An insulating layer formed on a rear surface of the electroluminescent element layer to protect the electroluminescent element layer; A half mirror formed on the entire surface of the transparent material layer; A human body sensor detecting a human body approaching the half mirror; And a power supply for controlling driving of the electroluminescent element layer according to the human body approach sensing information of the human body sensing sensor, wherein the power supply unit of the electroluminescent element layer is detected when the human body is detected by the human body sensing sensor. Stop the drive.

The half mirror includes a reflector layer formed on the front surface of the transparent material layer; And a glass layer formed on the entire surface of the reflector layer.

The half mirror may be used as a mirror when approaching a human body is detected by the human body sensor.

The electroluminescent device layer may include a first electrode layer formed on a rear surface of the coating layer; A fluorescent layer formed on a rear surface of the first electrode layer; A dielectric layer formed on the rear surface of the fluorescent layer; And a second electrode layer formed on a rear surface of the dielectric layer to have a pattern corresponding to a light emitting pattern of the UV printed layer, wherein the pattern of the second electrode layer is electrically separated to supply power through different power supply lines. It consists of a plurality of unit patterns.

The first electrode layer is formed on the rear surface of the coating layer to correspond to the unit pattern of the second electrode layer.

The first electrode layer is formed on the rear surface of the coating layer to correspond to the light emission pattern of the UV printing layer.

The first electrode layer is formed over the entire rear surface of the coating layer.

According to the present invention, since the patterned EL element composed of the unit pattern is formed directly on the UV printed transparent material layer, the manufacturing process is simple, the thickness is reduced, and the electric field split light emission is possible, and the unit within the specific pattern is also possible. A half mirror electric field division display device using an EL element capable of various dimming effects according to a pattern can be manufactured.

In addition, according to the present invention, since the UV ink is used, the drying time is shortened, and the manufacturing time is shortened, and various colors can be expressed.
In addition, according to the present invention, by forming a coating layer between the UV printing layer and the EL element layer, there is an effect that can protect the UV printing layer.

In addition, according to the present invention, when the approach of the human body is sensed by forming the reflector layer and the glass layer on the upper portion of the device, the driving of the EL element is stopped and can be used as a half mirror.

Other objects and advantages of the present invention in addition to the above object will be apparent from the description of the preferred embodiment of the present invention with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 2 to 6.

Prior to this, the terms or words used in this specification and claims should not be construed as being limited to their usual or dictionary meanings, and the inventors will properly describe the concept of terms in order to best explain their own design. Based on the principle that it can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be substituted for them at the time of the present application It should be understood that there may be equivalents and variations.

FIG. 2 is a diagram illustrating a laminated structure of a half mirror field split display device using an EL element according to an embodiment of the present invention, FIG. 3 is a cross-sectional view of the half mirror field split display device shown in FIG. It is a flowchart showing a manufacturing method.

First, referring to FIGS. 2 and 3, a half mirror electric field division display device using an EL element according to an embodiment of the present invention includes a half mirror 100, a transparent material layer 130, a UV printing layer 140, and a coating layer. 150, an EL element layer 300, and an insulating layer 200.

Hereinafter, each configuration and a manufacturing method of the half mirror electric field division display device using the EL element according to an embodiment of the present invention will be described with reference to FIGS. 2 to 4.

The transparent material layer 130 is formed using glass, polyvinyl chloride (PVC), polyethylene resin (PET), acrylic, or lexan, and at the same time serves as a display screen by emitting light through the front surface thereof. It serves to protect the EL element layer 300.

UV printing layer 140 is formed to have a predetermined light emitting pattern on the back of the transparent material layer 130, in order to minimize the friction between the transparent material layer 130 and the UV printing layer 140 UV printing layer 140 Before forming the is subjected to a pre-treatment process for processing a special drug on the back of the transparent material layer 130 (S1). Through the pretreatment process, since the UV printed layer 140 is completely adhered to the transparent material layer 130, the UV printed layer 140 is not damaged even under the influence of external environment such as scratching or moisture.

The UV printing layer 140 is formed by printing UV ink on the back surface of the pretreated transparent material layer 130 and UV drying (S2). UV inks harden instantaneously and require only about 0.03 seconds to dry after printing. Therefore, there is an effect that the manufacturing time can be shortened up to 20,000 times or more compared with using the solvent ink or dye / pigment ink. In addition, the UV ink is not limited to the printable material, can be expressed in high resolution, effective, environmentally friendly, and has the advantage of resistance to friction, heat resistance, solvents, chemicals and the like.

As described above, the coating layer 150 is formed by coating the back surface of the transparent material layer 130 on which the UV printing layer 140 is formed (S3). The coating layer 150 protects the UV printed layer 140 and serves to make the EL element layer 300 well formed on the back of the UV printed layer 140.

On the back side of the coating layer 150, an EL element layer 300 composed of a plurality of predetermined unit patterns that can be individually controlled to emit light corresponding to the light emitting pattern portion of the UV printing layer 140 is formed. The EL element layer 300 includes a first electrode layer 160, a fluorescent layer 170, a dielectric layer 180, and a second electrode layer 190.

First, the first electrode layer 160 is formed by depositing a first electrode on the back surface of the coating layer 150 (S4). The first electrode layer 160 may be formed on the entire back surface of the coating layer 150, or may be formed on the back surface of the coating layer 150 corresponding to the pattern portion to emit light of the UV printing layer 140, It may be formed by a combination of predetermined unit patterns. Here, the unit pattern means a pattern having a predetermined size constituting the light emitting pattern, the light emitting pattern is composed of a plurality of unit patterns.

The first electrode layer 160 may be composed of a conductive mesh layer and a conductive polymer layer. The first electrode layer 160 may be formed to a thickness of 80 μm to 100 μm, and a thickness of 90 μm is preferable. The conductive mesh layer is a mesh-type adhesive film made of a conductive material such as aluminum or copper, and may be formed at a density between 80 and 90 mesh screens, and preferably has a density of 85 mesh.

Meanwhile, the conductive polymer layer is preferably composed of solid conductive polymer aluminum (AL ₂ O ₃ ). In the present invention, in addition to the conductive polymer aluminum (AL ₂ O ₃ ), a conductive polymer that can be used as a solid electrolyte may be used. Conductive polymers include polyacetylene, P-phenylene, polythiophence, ethylenedioxythiophene, polypyrrole, and polyparaphenyl vinylene. , Thienylene vinylene, polyaniline, Polysothianaphthence, and polyphenylene sulfide may be used.

The conductive mesh layer and the conductive polymer layer are manufactured in the form of a mutual conductive film, and the two films are formed by extrusion molding, and the internal resistance of the first electrode layer 160 is maintained such that 300 Ω to 300 Ω are maintained. Extrusion of the first electrode layer 160 is such that the internal resistance is maintained through a uniform pressing force, and in this case, the first electrode layer 160 may be molded to a thickness of 90 μm.

The fluorescent layer 170 is formed by applying the phosphor to the back surface of the first electrode layer 160 formed as described above (S5). Various materials such as petroleum, lead glass and platinum cyanide can be used as the phosphor, and are fired by adding a activator (zinc, silver, copper, manganese, lead, etc.) to zinc sulfide (ZnS) and a mixture of cadmium sulfide or zinc sulfide. do. Here, the baking temperature of an activator is about 1,000 degreeC. Of course, phosphate-based (Ca ₂ (PO ₄ ) ₂ , CaF ₂ : Sb, etc.), silicate-based, or pure tungstate-based (CaWO ₄ or MgWO ₄ ) and the like can be used, and for the combination of each substance and the activator By this, light emission color intensity, light attenuation type, etc. differ.

As described above, the phosphor is maintained at 3500 cps to 4500 cps and then coated on the back surface of the first electrode layer 160. The viscosity of the phosphor is related to the driving voltage of the display device, and when the viscosity is high or low, a change in the driving frequency of 8 KHz driving the display device is inevitable. In addition, since the viscosity of the phosphor affects the luminescence brightness, it can be said that the viscosity corresponding to the set driving voltage and frequency is essential. In the present invention, the viscosity of the phosphor is maintained at 4000 cps. Viscosity measurements are made at a sample volume of 350 ml at a temperature of 25 ° C, and the precision of the viscometer is less than 10%.

In addition, the fluorescent layer 170 is a phosphor having a set viscosity is applied to the back of the first electrode layer 160, and then dried for about 4 to 6 minutes at 135 ℃ to 145 ℃. The drying temperature is related to the density of the applied phosphor. That is, when the drying temperature is exceeded, the drying time of the phosphor is drastically generated, and a non-uniform drying phenomenon occurs in a part of the phosphor. In addition, below the drying temperature, there is a problem that the drying time is not only long, but also causes deformation of the coated surface.

Therefore, the fluorescent layer 170 should be dried at 135 ° C to 145 ° C, preferably at 160 ° C for about 4 minutes to 6 minutes, preferably 5 minutes. The fluorescent layer 170 is formed to a thickness of 45 to 50μm. The fluorescent layer 170 configured as described above is a fluorine binder and has a dielectric constant of 30 kPa to 300 kPa.

Thereafter, the dielectric layer 180 is formed by depositing a dielectric on the back surface of the fluorescent layer 170 (S6). As the dielectric material, a material capable of inducing light diffusion and reflection with polyester, polypropylene, polypropylene sulfide, and the like is used. The dielectric material has a viscosity of 15000 cps and the viscosity measurement condition is 350 ml of sample volume at 25 ° C. Dielectric layer 180 is formed to a thickness of 20 to 25μm. In addition, the dielectric layer 180 is dried for about 4 to 6 minutes, preferably 5 minutes at the same drying conditions as the fluorescent layer 170, that is, 135 ℃ to 145 ℃, preferably 160 ℃. The dielectric layer 180 configured as described above has a dielectric constant of 30 kV to 300 kV.

The second electrode layer 190 is formed by depositing a second electrode pattern on the rear surface of the dielectric layer 180 (S7). The second electrode pattern has a shape corresponding to the pattern portion of the UV printed layer 140 to emit light, so that the second electrode layer 190 emits the UV printed layer 140 to emit light from the rear surface of the dielectric layer 180. ) Is formed on the pattern portion. In this case, the second electrode pattern includes a plurality of unit patterns as described in the first electrode layer 160. At this time, each unit pattern is separately formed so as not to be electrically connected. Referring to FIG. 5, the second electrode pattern A has the same shape as the pattern of the UV printing layer 140 by the combination of the unit patterns B, and each unit pattern B is independently. It can emit light. To this end, each unit pattern B is supplied with power through a different power supply line. As a result, the electroluminescent display according to the present invention emits light in the form of a dot matrix. That is, when the UV printed layer 140 has a letter pattern, and the second electrode layer 190 is formed at a portion corresponding to the letter pattern, only the letter pattern part emits light, and independent light emission of each unit pattern is performed. Accordingly, an electric field division display device capable of various dimming effects can be implemented within a letter pattern.

The second electrode layer 190 is formed in the form of a conductive film using silver, carbon, aluminum, or the like. In addition, the second electrode layer 190 has a resistance of 9Ω / m 2 to 11Ω / m 2 and is formed to have a viscosity of 10000 cps. Drying conditions are dried at 135 ° C. to 145 ° C., preferably at 160 ° C. for about 4 minutes to 6 minutes, preferably 5 minutes.

The second electrode layer 190 is to transfer the power supplied from the power supply unit 420 to the dielectric layer 180 and the fluorescent layer 170, if necessary, electro zinc treatment, electro copper plating, electro nickel plating, chromium plating, It can also be formed by silver plating, gold plating, or electroless nickel plating. The second electrode layer 190 may be formed to have a thickness of 5 μm to 10 μm. Since the power supplied from the power supply 420 is low, even if the thickness of the second electrode layer 190 is set to a minimum, there is no problem.

The insulating layer 200 is formed by depositing an insulator on the back surface of the EL element layer 300 thus formed (S8). As the insulator, mica, phenol resin, polyester, marble, paraffin, polyesterol, and the like are used to serve to protect the EL element layer 300.

A half mirror 100 is formed on the front surface of the transparent material layer 130. The half mirror 100 may be formed by being bonded to the front surface of the transparent material layer 130 in a state in which the glass layer 110 and the reflector layer 120 are stacked, or the reflector layer (on the front surface of the transparent material layer 130). The glass layer 110 and the glass layer 110 may be sequentially stacked.

In the present invention, the half mirror 100 is used as a mirror when a person approaches. To this end, the half-mirror field split display using the EL element according to the present invention includes a human body sensor (410). The human body sensor 410 is a device for detecting a human body approaching the half mirror 100 and supplying sensing information to the power supply unit 420, and is installed in proximity to the half mirror 100. For example, the human body sensor 410 may be installed on the rear or side surface of the half mirror 100, or may be installed on a frame of the display device.

The power supply unit 420 interrupts the driving of the EL element layer 300 by cutting off the power supplied to the second electrode layer 190 when the human body approach is detected by the human body sensor 410. Accordingly, since the light is not emitted from the rear surface of the half mirror 100, the half mirror 100 may function as a mirror through the reflector layer 120 and the glass layer 110. On the other hand, when the approach of the human body is not detected by the human body sensor 410, the power supply unit 420 supplies power to the second electrode layer 190 so that the EL element layer 300 can be driven. Accordingly, light generated at the rear surface of the half mirror 100 is displayed to the outside through the half mirror 100.

FIG. 6 is a diagram illustrating an embodiment of a half-mirror field split display device using an EL element having a letter pattern, and shows an example of patterning each spelling of the phrase "EL". That is, an example in which the phrase “EL” is UV printed and a second electrode layer composed of a plurality of unit pattern combinations is formed on a portion corresponding to each spelling of the phrase “EL” formed on the UV print layer. In this case, the first electrode layer may be formed over the entire surface, or may be formed in a portion corresponding to each spelling of the “EL” phrase in the same manner as the light emitting pattern of the second electrode layer, and correspond to each unit pattern constituting the second electrode layer. It may be formed by unit patterning.

Here, as described above, since each unit pattern is supplied with power through different power supply lines, not only individual blink control is possible for each unit pattern but also light may be emitted at different brightnesses. Therefore, in the present invention, even in the same light emission pattern as "E" or "L", various dimming effects are possible, such as to sequentially emit light from a specific part or cross-light emission according to a unit pattern.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the utility model registration claims.

1 is a diagram showing a half mirror electric field division display device using a conventional EL element.

2 is a diagram illustrating a laminated structure of a half mirror electric field division display device using an EL element according to an exemplary embodiment of the present invention.

3 is a cross-sectional view of the half mirror electric field division display device shown in FIG. 2.

4 is a flowchart illustrating a method of manufacturing a half-mirror field split display using an EL element according to an embodiment of the present invention.

5 is a diagram for describing a second electrode pattern and a unit pattern.

Fig. 6 is a diagram showing an example of a half mirror electric field division display device using an EL element having a letter pattern.

<Brief description of symbols for the main parts of the drawings>

10: front protective substrate 20: printed circuit board

30: transparent substrate 40, 300: EL element layer

50: rear protective cap 110: glass layer

120: reflector layer 130: transparent material layer

140: UV printing layer 150: coating layer

160: first electrode layer 170: fluorescent layer

180: dielectric layer 190: second electrode layer

200: insulation layer 410: human body detection sensor

420: power supply

Claims (7)

Transparent material layer; A UV printing layer printed on the back of the transparent material layer so that UV ink has a predetermined light emission pattern; A coating layer formed on a rear surface of the transparent material layer on which the UV printing layer is formed, and protecting the UV printing layer; An electroluminescent device layer formed on the back surface of the coating layer and configured of a plurality of individually controllable unit patterns so that a portion corresponding to the light emitting pattern of the UV printed layer emits light; An insulating layer formed on a rear surface of the electroluminescent element layer to protect the electroluminescent element layer; A half mirror formed on the entire surface of the transparent material layer; A human body sensor detecting a human body approaching the half mirror; And A power supply for controlling the driving of the electroluminescent element layer according to the human body approach detection information of the human body sensor. Including, The power supply unit stops driving the electroluminescent element layer when the human body is detected by the human body sensor, The electroluminescent device layer may include a first electrode layer formed on a rear surface of the coating layer, a fluorescent layer formed on a rear surface of the first electrode layer, a dielectric layer formed on a rear surface of the fluorescent layer, and a light emitting pattern of the UV printed layer on a rear surface of the dielectric layer. A second electrode layer formed to have a pattern corresponding to The pattern of the second electrode layer is composed of a plurality of unit patterns electrically separated and supplied with power through different power supply lines. The fluorescent layer is formed by applying a phosphor having a viscosity of 3500cps to 4500cps on the back surface of the first electrode layer, and then dried at 135 ℃ to 145 ℃, an electric field characterized in that formed to a thickness of 45㎛ 50㎛ Half-mirror field split display using light emitting element. The method of claim 1, The half mirror, A reflector layer formed on the entire surface of the transparent material layer; And Glass layer formed on the front of the reflector layer Half-mirror field split display using the electroluminescent element comprising a. The method of claim 2, The half mirror is a half-mirror field split display using an electroluminescent device, characterized in that the half mirror can be used as a mirror when the approach of the human body is detected by the human body sensor. delete The method of claim 1, The first electrode layer is formed on the back surface of the coating layer, so as to correspond to the unit pattern of the second electrode layer. The method of claim 1, The first electrode layer is formed on the back surface of the coating layer, so as to correspond to the light emitting pattern of the UV printed layer. The method of claim 1, And the first electrode layer is formed over the entire rear surface of the coating layer.

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