KR20130051330A - Packaging material having light emission display - Google Patents

Abstract

PURPOSE: A packing material is provided to minimize increase of volume and weight due to equipping a display device and to increase visual display effect. CONSTITUTION: An EL display is mounted to a main body and emits light by applying electricity. An operation control part is installed in the main body and supplies electricity to the EL display. A first electrode layer(20) is formed on a substrate(10). A light emitting layer(30) consists of an EL phosphors printed on the upper side of the first electrode layer. A second electrode layer(50) is formed on the light emitting layer. A dielectric layer(40) is printed between the light emitting layer and first electrode layer, or the light emitting layer and second electrode layer. Light from the light emitting layer is emitted to outside through the second electrode layer.

Description

Packing material with light emitting display {PACKAGING MATERIAL HAVING LIGHT EMISSION DISPLAY}

The present invention relates to a packaging material having a light-emitting display, and more particularly, a display that produces a sensory and unique visual effect may induce interest of a product buyer or a consumer and increase a desire to purchase the product and related stores. The present invention relates to a packaging material having a light emitting display that can upgrade a marketing and promotion strategy of a company or a company.

Packaging materials made of various materials and forms are used for the purpose of accommodating products, for convenience of storage, transportation, display, etc., and for preventing damage to the products. Typically, these packaging materials are provided with various texts, patterns, etc. in a printing manner in order to display information about the product and induce interest and purchase desire for the product.

For example, among the confectionery / bakery products sold in bakeries, especially cakes, the product selected by the buyer is sold in a box-type packaging made of paper. Such a packaging box has a form in which a pedestal for supporting a cake is built in a box body having a handle at the top thereof, and displays the name, logo, product name, advertisement text, etc. of the manufacturer or store of the product on the outer surface of the box body. Text and patterns are printed.

Packaging can be a marketing tool that can increase the added value of the product and at the same time give the advertising effect. As the competition for sales becomes fierce, marketing and the marketing of products in addition to the method of printing texts and patterns on the packaging as described above The development of new packaging materials and packaging technologies that can exhibit personality and characteristics that align with promotional strategies is required.

However, as described above, the conventional product packaging material has been dependent only on a method of simply printing a phrase or a pattern on the outer surface, and thus, there have been many disadvantages in terms of effects of inducing interest and desire for consumers. In other words, it is difficult to expect a unique visual effect that appeals strongly to consumers by simply printing advertisements or characters on the surface of the packaging as in the prior art. Thus, functions such as promoting sales of products by the packaging and promoting the store or company There was an unsatisfactory problem.

In order to obtain a more effective marketing effect, it is possible to consider mounting a display device using a display element such as an LED or LCD on the packaging material. However, there are many technical and cost limitations in adopting a conventional solid type display device in the packaging material. There is a problem that follows. For example, in the case of adopting a general display device in a box-type bakery packaging material, the display device and power supply require excessive packaging costs, and increase the weight and volume of the packaging material, and in particular, store and store the product in a folded state before use. Due to the nature of the box-shaped packaging material to be transported there is a problem that the difficulty in handling due to the increase in volume.

The present invention has been made to solve the above-mentioned problems, while minimizing the increase in weight and volume due to the provision of the display, and beyond the monotonous display function of the conventional printing method, the display and visual display of more diverse and sensational products and related information It is an object of the present invention to provide a packaging material having a light emitting display capable of producing effects and the like.

The present invention for achieving the above object, the product is accommodated; An EL display provided in the main body to emit light upon application of power; And a drive control unit provided in the main body to supply operating power to the EL display, wherein the EL display includes a substrate, a primary electrode layer provided on the substrate, and an EL phosphor printed on the primary electrode layer. A light emitting layer, a secondary electrode layer printed on the light emitting layer, and a dielectric layer printed between the light emitting layer and the primary electrode layer, or between the light emitting layer and the secondary electrode layer, wherein the primary electrode and Provided is a packaging material having a light emitting display in which light of the light emitting layer generated by an operating power source applied to a secondary electrode is emitted to the outside through the substrate or the secondary electrode layer.

In addition, the present invention, the EL display is a primary electrode layer printed on the surface of the main body, a light emitting layer consisting of an EL phosphor printed on top of the primary electrode layer, a secondary electrode layer printed on the light emitting layer, and the light emitting layer And a dielectric layer printed between the first electrode layer and the first electrode layer or between the light emitting layer and the second electrode layer, wherein the light of the light emitting layer generated by the operating power applied to the primary electrode and the secondary electrode through the driving control unit. Provided is a packaging material having a light emitting display that is emitted to the outside through the secondary electrode layer.

The substrate is preferably made of a flexible substrate of various materials including a light transmitting film.

Preferably, the main body is provided with a switch connected to the driving control unit to turn on / off power applied to the primary electrode layer and the secondary electrode layer. The main body may be provided with a handle including two or more gripping pieces, in which case, the gripping pieces may be provided with a switch that is energized when in contact with each other.

In addition, the main body may be provided with a sound generating device for outputting sound in accordance with the power supply. The sound generating device may be connected to the driving control unit to control the operation of the EL display in conjunction with each other, or may be controlled separately from the operation of the EL display.

The substrate may be made of a PEN film, and the primary electrode layer may be made of an Ag trace layer on which an Ag paste is printed on the PEN film.

In addition, the substrate and the primary electrode layer may be made of an ITO coating film. In some cases, an Ag trace layer may also be printed on the ITO coated film.

The primary electrode layer may be printed in the form of an edge so that the light transmitting portion is formed therein, and the secondary electrode layer may be printed in the form of covering the opposite side to emit light through the light transmitting portion of the primary electrode layer.

A first conductive polymer layer may be printed between the substrate and the primary electrode layer.

When the first conductive polymer layer is provided, the primary electrode layer is formed in a rim shape with an empty inside, and the light emitting layer has a circumference portion in contact with the primary electrode layer and an inner portion thereof in contact with the first conductive polymer layer. Can be printed.

In addition, a second conductive polymer layer may be printed between the dielectric layer and the secondary electrode layer, and in this case, the secondary electrode layer may be printed to cover the entire surface of the second conductive polymer layer.

In some cases, a cover member or a coating material may be provided on the secondary electrode layer to cover any one or two or more of the primary electrode layer, the light emitting layer, the dielectric layer, and the secondary electrode layer.

At least one of the primary electrode layer and the secondary electrode layer may be formed of a polymer transparent electrode.

The present invention provides a packaging material with a light and thin EL display at low cost by using printed electronic technology and EL elements, thereby minimizing additional cost and increasing the weight and volume of the packaging material, such as a logo or a character, various advertisement phrases and product information. By maximizing the visual recognition and advertising effect of the same characters, there is an effect that can improve the buyer's interest in the product and the desire to purchase.

That is, according to the present invention, it is possible to solve the technical and cost constraints of adopting the existing solid-type display in the packaging material, to overcome the disadvantages in the technical cost aspect as described above in a wide range of fields It is possible to provide new and useful display media (eg, unique advertising media) that can be easily employed.

The electroluminescent display for packaging materials of the present invention has a variety of applications, but in particular, it has been applied to the field of bakery packaging, which has undergone rapid market growth and has various demand layers, and thus can have a useful ripple effect in economic and industrial aspects.

Further, the present invention further improves the productivity and cost efficiency of the packaging material with a display by providing the EL display on the surface of the packaging material by a direct printing method.

In addition, by providing a switch that is energized upon contact with the handle provided in the packaging material, it is possible to further improve product satisfaction by giving a simpler and new feeling to the operation of the EL display.

In addition, by providing a sound generating device that works in conjunction with the EL display, it is possible to further improve product satisfaction by providing a new sense of packaging means.

1 is a perspective view showing an embodiment of a packaging having a light emitting display according to the present invention.
FIG. 2 is a sectional view showing the structure of an EL display in the packaging material of the present invention shown in FIG.
3 is a cross-sectional view showing another configuration of the EL display in the packaging material of the present invention shown in FIG.
FIG. 4A is a plan view illustrating a state in which a first conductive polymer layer is printed on a substrate in the manufacturing process of the EL display shown in FIG. 2.
4B is a photograph showing the printing result of the first conductive polymer layer shown in FIG. 4A.
5A is a plan view illustrating a state in which a primary electrode layer is printed on the first conductive polymer layer illustrated in FIGS. 4A and 4B.
FIG. 5B is a photograph showing the printing result of the primary electrode layer shown in FIG. 5A.
6A is a plan view illustrating a state in which a light emitting layer is printed on the primary electrode layers illustrated in FIGS. 5A and 5B.
6B is a photograph showing the printing result of the light emitting layer shown in FIG. 6A.
FIG. 7A is a plan view illustrating a state in which a dielectric layer is printed on the light emitting layers illustrated in FIGS. 6A and 6B.
FIG. 7B is a photograph showing the printing result of the dielectric layer shown in FIG. 7A.
FIG. 8A is a plan view illustrating a state in which a second conductive polymer layer is printed on the dielectric layers shown in FIGS. 7A and 7B.
FIG. 8B is a photograph showing the printing result of the second conductive polymer layer shown in FIG. 8A.
9A is a plan view illustrating a state in which a secondary electrode layer is printed on the second conductive polymer layer shown in FIGS. 8A and 8B.
FIG. 9B is a photograph showing the printing result of the secondary electrode layer shown in FIG. 9A.
10A is a photographic view of the EL display manufactured through the above process seen from the light emitting surface side.
FIG. 10B is a photographic view of the EL display shown in FIG. 10A seen from the back side.
11A and 11B are photographic views of EL displays produced using ITO coated films.
12A and 12B are photographic views showing EL displays manufactured using PEN films.
13A and 13B are photographic views showing a driving test state of an EL display manufactured using an ITO coated film.
Fig. 14 shows a connection state between the EL display, the drive control unit and the power source provided in the packaging material of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.

The following specific structures or functional descriptions are merely illustrated for the purpose of describing embodiments in accordance with the inventive concept, and embodiments according to the inventive concept may be embodied in various forms and may be described in detail herein. It should not be construed as limited to the examples.

Embodiments in accordance with the concepts of the present invention can be variously modified and have a variety of forms, specific embodiments will be illustrated in the drawings and described in detail herein. However, it should be understood that the embodiments according to the concept of the present invention are not intended to limit the present invention to specific modes of operation, but include all modifications, equivalents and alternatives falling within the spirit and scope of the present invention.

The terms first and / or second etc. may be used to describe various components, but the components are not limited to these terms. The terms may be named for the purpose of distinguishing one element from another, for example, without departing from the scope of the right according to the concept of the present invention, the first element being referred to as the second element, The second component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when it is mentioned that an element is "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Other expressions to describe the relationship between components, such as "between" and "immediately between" or "adjacent to" and "directly adjacent to", should be interpreted as well.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. The terms "comprise" or "having" herein are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof that is practiced, and that one or more other features or numbers, It is to be understood that it does not exclude in advance the possibility of the presence or addition of steps, actions, components, parts or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the meaning of the context in the relevant art and, unless explicitly defined herein, are to be interpreted as ideal or overly formal Do not.

Hereinafter, the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.

The packaging material to which the present invention is applied includes all kinds of conventional forms and materials used for packaging products such as boxes, bags, pouches, and packing sheets, and in the following description, a box-shaped packaging material (for example, a cake The application to the bakery box for) will be described as an example.

As shown in FIG. 1, the packaging material of the present invention includes a main body 120 having a storage space in which an object to be packaged (for example, a bakery product such as a cake or bread) is contained therein, An EL display 130 provided to be exposed to the outside to display contents of various characters, drawings, and the like, and switches 141a, 141b, and 142 for turning on / off a power supply for driving the EL display 130. It is configured by.

The main body 120 is made in the form of a housing that can accommodate a product therein by cutting and folding a plate of a variety of materials, including paper, the illustrated main body 120 is made of a paper box for packing a cake The upper surface is provided with a handle 122 consisting of a pair of holding pieces (122a, 122b).

The EL display 130 is formed of an electroluminescent device printed on a substrate using printed electronic technology, and may be coupled to the main body 120 in various ways, such as by attaching or inserting it. It may be provided by printing directly on the surface of the main body 120 without a substrate.

The EL display 130 illustrated in FIGS. 2 and 3 has a structure in which the primary electrode layer 20, the light emitting layer 30, the dielectric layer 40, and the secondary electrode layer 50 are sequentially printed on the substrate 10. In addition, the substrate 10 is coupled to the main body 120 in such a manner as to be bonded or inserted so as to be exposed to the outside.

Among these, the EL display 130 shown in FIG. 2 includes a substrate 10 having a printable surface, a first conductive polymer layer 25 printed on the substrate 10, and a first conductive polymer layer ( 25, a light emitting layer 30 printed on the primary electrode layer 20, a dielectric layer 40 printed on the light emitting layer 30, on the dielectric layer 40. The printed second conductive polymer layer 55 and the secondary electrode layer 50 printed on the second conductive polymer layer 55 are included.

As illustrated in various photographic views including FIG. 4B, the substrate 10 is made of a thin and flexible substrate, that is, a flexible substrate, such as a film, and thus the EL display 130 has flexible film type display characteristics. Is preferred. For example, the substrate 10 is a film used for manufacturing an organic light emitting device using a screen printing process, polyethylenenaphthalate (PEN), polyethylene terephthalate (PET), polycarbonate (PC) A flexible film such as the above may be employed, and in addition to the film-type substrate 10, a substrate 10 such as an LCD, a glass foil, or an optical coating paper may be freely used. In the illustrated embodiment, a PEN film having low cost, high light transmittance and chemical stability, excellent thermal stability with respect to light emitting area and voltage, and small coefficient of thermal expansion (CTE) was employed. The thickness of the substrate 10 may be variously selected according to conditions of use, etc. In this embodiment, a substrate 10 (PEN film) having a thickness of 188 μm is used.

In the EL display 130 shown in Fig. 2, the first layer printed on the substrate 10 is a conductive polymer layer (first conductive polymer layer) 25 including a surface emitting portion and a connection portion of the electrode. to be. As described above, in the case of using the PEN film, a transparent conductive polymer is printed in order to connect the light emitting portion with the Ag trace layer used as the primary electrode layer 20. 4A and 4B show a result of printing a first conductive polymer layer 25 on the substrate 10.

On the other hand, when using an ITO film coated with an ITO layer 20 on the substrate 10, as in another embodiment of the EL display 130 shown in FIG. 3, the ITO layer 20 is the primary electrode layer 20 In this way, printing of the first conductive polymer layer 25 is unnecessary.

The primary electrode layer 20 is printed on the substrate 10. Indium tin oxide (ITO) may be used as the transparent electrode formed on the PEN film. In addition, carbon nanotubes (CNT), graphene, and conductive polymers may be used as the transparent electrode. ITO coating film of less than / sq and PEDOT: PSS-based conductive polymer ink that can be printed by screen printing.Conductive screen printing ink: EL-P 3040 (Orgacon) can be used to form the primary electrode layer 20 (anode). have. Substitutable materials without forming ITO can be used by coating PH500, 750, 1000 (H. C Starck), which satisfy high conductivity and low resistance, and CLEVIOS S V3 (H. C Starck) for EL only. ) Can be used directly.

The primary electrode layer 20 is a conductive layer printed with a conductive ink. In this case, the conductive ink is a dispersion of conductive fillers in a vehicle, and refers to an ink in which a cured film after printing exhibits conductivity. In the embodiment shown in FIG. 2, the primary electrode layer 20 is an Ag trace electrode (printed on the substrate 10). Ag trace electrode). The conductive paste is a paste made by dispersing Ag powder in a resin, and may form a desired pattern by various printing methods such as screen printing, gravure printing, or offset printing. At this time, it is very important to evaluate the rheology characteristics of the paste so that the prepared paste is suitable for each printing method, that is, the optimum printing aptitude. In particular, the Ag paste for screen printing has the lowest viscosity when ink is pushed by the squeegee and passes through the opening (opening) of the mesh so that the ink can pass through the opening.

The ink passed through the opening is shaped by the viscosity and elasticity of the original ink. In other words, the paste recovers its viscosity by being affected only by gravity. At this time, if the viscosity is recovered quickly, the leveling property of the surface is not properly caught, and a non-uniform coating film is formed. On the contrary, if the viscosity recovery is too late, the ink spreads. At this time, the shape of the pattern, that is, the viscosity recovery, depends on the elasticity (Tg) of the binder resin and the shape and distribution of the dispersed Ag particles.

In the present invention, the ink used in the primary electrode (Ag trace) portion and the secondary electrode (cathode) portion to be described later is an Ag-based printing paste, having a viscosity of 4.5 ± 1kcps and low resistivity of less than 1.0 x 10 < -4 > Low Ag resistivity and conductive Ag paste (DGS-1502) having the best leveling properties when passed through a screen mesh of 325 mesh was used.

In the case of the EL display 130 shown in Fig. 2, the second layer printed on the substrate 10 is a printed layer of Ag traces used as the primary electrode layer 20. On the other hand, when using an ITO film such as the EL display 130 shown in Fig. 3, since the ITO is used as the primary electrode layer 20, such an Ag trace layer is not necessary. However, Ag traces may be applied on ITO films for damage to contacts or flexible connector applications. It can be seen that the primary electrode layer 20 has a high printing thickness unlike other layers. This phenomenon is due to the difference in the printing result depending on the size of particles included in the ink and the rheological properties of the ink. Ag ink is thicker than the conductive polymer in printing thickness because of the relatively large particles and high viscosity as compared with the conductive polymer. As a result, a primary electrode layer 20 (Ag trace layer) is printed on the first conductive polymer layer 25, and the printing state of the primary electrode layer 20 is illustrated in FIGS. 5A and 5B. . As shown in the drawing, the primary electrode layer 20 is provided in the form of a border with an empty inside.

6A and 6B, the light emitting layer 30 is printed on the primary electrode layer 20. The light emitting layer 30 may be referred to as a phosphor EL (Phosphor EL). The outer periphery of the light emitting layer 30 is energized by the primary electrode layer 20, and the remaining surface of the light emitting layer 30 is formed of the first conductive polymer layer due to the shape of the primary electrode layer 20 provided in the form of a frame. The light emitting layer 30 is printed in contact with 25.

The EL element is classified into a DC drive type structure and an AC drive type structure according to the driving method. Depending on the thickness of the device, it is classified into a powder type EL device by a screen printing method and a thin film type EL device by a vapor deposition method, and an organic EL device and an inorganic EL device according to whether organic fluorescent materials or inorganic fluorescent materials are used. Are classified as devices.

The inorganic EL is largely composed of three layers: a phosphor layer, a dielectric layer, and a back electrode layer. The phosphor uses ZnS: Cu, Cl powder having a diameter of 15 to 30 µm, and various polymers are used as binders to disperse and fix the phosphor so that the phosphor does not move.

The phosphor most commonly used for thick film inorganic EL is ZnS: Cu, Cl. The impurity concentration is one order higher than ZnS: Cu, Al (Cl). Usually Cu or a phosphor doped with Cu and Cl is used, where Cu acts as a acceptor and Cl acts as a donor. The emission color is controlled according to the type and amount of the doped material as shown in the table below. In general, ZnS: Cu, I is dark blue (~ 440nm), and ZnS: Cu, Cl is blue to green. The series (450 ~ 510nm), ZnS: Cu, Al emit green series (~ 550nm), and ZnS: Cu, Mn emit orange series (~ 580nm).

As the material of the light emitting layer 30 used in the present invention, phosphor (EL) ink manufactured for screen printing of zinc sulfide (ZnS) component was used: EL 5400 (Ormecon), which was driven at AC voltage as an inorganic EL. Emits bluish green. Of course, if necessary, the light emitting layer 30 may emit light of a different color.

In the case of EL, when a strong electric field is formed by applying an alternating voltage from the outside, electrons trapped at the interface level between the insulating layer and the light emitting layer 30 tunnel into the conduction band of the light emitting layer 30. After sufficient energy is obtained by an external electric field, collision with the outermost electrons in the emission center causes the excited electrons to be released from the excited state to the ground state, and light is emitted by the energy difference. The part is the printing of the EL layer, that is, the light emitting layer 30.

It can be seen that the light emitting layer 30 has a thick printing similarly to the Ag trace layer, that is, the primary electrode layer 20. When visually checking the rheological properties of the material, it can be seen that the thickness of the EL phosphor is thicker, although the viscosity is lower than that of the Ag paste. This means that the particles of the EL phosphor are colloid (particles of about 1 to 100 nm in size). Is a size of 103 to 109 atoms and is dispersed in another substance) or suspension (suspension-suspended system in which solid fine particles are dispersed in a liquid). It can be seen that there are many differences in printing thickness.

As shown in FIGS. 7A and 7B, a dielectric layer 40 is printed on the light emitting layer 30. The dielectric layer 40 is formed by printing a dielectric paste by screen printing. The function of the dielectric layer 40 is to act as an insulator that prevents unnecessary current from flowing by directly contacting the phosphor powder and the back electrode, reflecting light emitted from the phosphor, and a dielectric that accumulates electric charges and increases an electric field applied to the phosphor. It will play the role of.

The dielectric layer 40 is formed of a dielectric powder such as TiO ₃ and a binder to fix the powder. In order to sufficiently increase the electric field applied to the phosphor, that is, the light emitting layer 30, a dielectric material having a high dielectric constant and a binder should be used.

As a dielectric material having such properties as high dielectric constant material used in the present invention, BaTiO ₃ other than SrTiO _3, BaTa ₂ O _6, such as this, and in the illustrated embodiment uses a BaTiO _3, a binder material resin to flow Dielectric ink using: EL5500 is used.

If the primary electrode layer 20 and the secondary electrode layer 50, which will be described later, are directly engaged when the EL display 130 is manufactured, it may be impossible to drive as a light emitting device due to an electrical short or a short circuit. Therefore, in the EL element of the present invention in which the main portions overlap each other, the dielectric layer 40 is printed in the middle so that the primary electrode layer 20 and the secondary electrode layer 50 do not directly engage with each other. In the present invention, EL 5500 is used as the material of the dielectric layer 40.

As shown in FIGS. 8A and 8B, a conductive polymer layer (second conductive polymer layer) 55 may be printed on the dielectric layer 40. The second conductive polymer layer 55 is printed using the same ink as the first conductive polymer layer 25 in order to adjust the work function and maintain light emission stability when voltage is applied. The second conductive polymer layer 55 is applied to increase conductivity or luminous efficiency. The second conductive polymer layer 55 may be omitted for stability of the process or for easy device implementation.

As shown in FIGS. 9A and 9B, the secondary electrode layer 50 is printed on the top surface of the second conductive polymer layer 55 or the top surface of the dielectric layer 40. That is, the second conductive polymer layer 55 may be printed on the dielectric layer 40, and the secondary electrode layer 50 may be printed on the second conductive polymer layer 55, and the secondary electrode layer may be directly on the dielectric layer 40. 50) can also be printed.

The secondary electrode layer 50 may be formed of an Ag trace layer, and the Ag paste used as the secondary electrode is printed using the same ink as the primary electrode layer 20. Although the ink and the process are similar, the pattern shape of the primary electrode layer 20 and the pattern shape of the secondary electrode layer 50 are formed differently for the front emission. While the primary electrode layer 20 is printed in the form of an empty border inside for light emission, the secondary electrode layer 50 is inside the periphery of the primary electrode layer 20 to block the light so as not to emit light to the rear surface. It prints in the pattern shape which coats the whole surface located in. In some cases, like the primary electrode layer 20, the secondary electrode layer 50 may also be printed in a pattern having an edge shape.

The Ag paste used as the contact electrode should be made of a material that is as easy as possible to print. In addition to the pattern, it is also possible to form bus lines for external circuit contact. This technique is applicable to more places by using various line widths and pattern designs for various cell effects.

As described above, the EL display 130 has a flexible structure in which the primary electrode layer 20, the light emitting layer 30 (fluorescent layer), the dielectric layer 40 and the secondary electrode layer 50 are sequentially printed on the substrate 10. FIG. As shown in FIG. 14, the display module has a display module structure and is connected to a driving control unit 2 that controls a power supply for driving light emission.

The driving control unit 2 is connected to the primary electrode layer 20 and the secondary electrode layer 50 to adjust and apply the power supplied from the power source 1 such as a battery to a voltage / current suitable for light emission of the light emitting layer 30. As a drive driver, a switching means for ON / OFF operation may be connected to the drive control unit 2 to supply or cut power. Although not separately illustrated, even when the Ag trace primary electrode layer 20 is printed on the PEN film without employing an ITO coating film, the driving control unit 2 may be the same as the primary electrode layer 20 and the secondary electrode layer 50. Is connected to the power source 1.

The switching means may be provided in a structure that is switched on when the user grasps the handle 122 of the packaging material by hand, and is switched on by using a separate operating mechanism such as a button, a slider, a lever, or the like. It may be provided. In the exemplary embodiment shown in FIG. 1, the contact terminals type switches 141a and 141b corresponding to each other are provided on both grip pieces 122a and 122b constituting the handle 122, and the handles 141a and 141b are held when the handle 122 is held. ) Is configured to be in contact with each other and energized, and separately provided with a button-type switch 142 that the user presses to operate. The handle 122 may be configured to maintain the energized state of the switch 142 even when held by the hand. For example, an adhesive having a low bonding force may be provided on at least one side of both gripping pieces 122a and 122b, and a fastening means capable of simply locking and releasing may be provided. . In addition to the above structure, various switch structures may be provided.

On the other hand, as shown in Figure 1, the main body 120 may be provided with a sound generating device 140. The sound generating device 140 may be connected to the driving control unit 150 and the switches 141a, 141b, and 142 so that the operation may be controlled together with the EL display 130, or may include a separate control unit and a switch. It may be connected so that the operation is controlled separately from the EL display 130. The sound generating device 140 may be configured to output stored music, such as a birthday song, or input, store, and output a congratulatory message containing a voice of a user, thereby further improving the value of the product. A useful effect can be obtained.

The driver implementation of the EL can be manufactured in various ways depending on the application. Since the present invention is applied to a packaging material such as a cake box, it implements a compact driver and requires minimal battery driving. Therefore, as the main point of the fabrication of the EL driver driver, it is realized with two conditions of miniaturization and low power.

A typical small battery supplies a voltage source of about 5V or less, which needs to be converted to an AC voltage of 100 to 300V required for driving the EL.

Recently, EL driver chips provide a variety of small chips. Typically be used in a cell phone, MP3, clock, can be applied to the area of 1.5inch ² or less, and has a form of HV850 chip removing the inductor occupying a relatively large area in the design driver. The HV850 chip's performance is capable of outputting AC voltages up to 148Vpp, with a maximum frequency of approximately 338Hz. However, it has a specification that can be applied to small area with maximum current of about 16mA.

In this embodiment, a driver having an input voltage of 3 V at 250 Hz is implemented as the most basic specification, and all device chips are designed in the SMD type to realize the minimum size. The size of the small area EL driver implemented in this embodiment was manufactured to about 1 cm 2 or less.

The small EL driver using the HV850 chip has a small light emitting area, can be designed with a minimum driver, and can be usefully used to drive a light emitting surface having the same size as a typical company brand logo.

On the other hand, a chip such as HV857 with an inductor can be used to emit more large area (up to 5 inches ² or less) of EL. It includes an inductor for AC voltage outputs up to 201Vpp and a maximum frequency of 235Hz. In addition, an optimized driver design is possible by changing a load resistance or a capacitor value. In this embodiment, a frequency of about 235 Hz and a maximum value of 184 Vpp are designed.

The large area EL driver using the HV857 also uses passive devices of SMD type to achieve the smallest possible size. In the present embodiment, unlike the small area, the optimal design is not applied to the large area driver, and it is expected that a design of about 2 cm 2 or less may be possible when designing the optimal circuit design in the future.

In order to drive various devices, various types of drivers such as HV850 or HV857 chips may be required. Supertex EL driver chips can be used. In addition, a driver chip that can be driven by EL area and power consumption can be selected.

In the case of the HV857 chip employed in the present invention, an EL cell of up to 5 inches ² is applicable, and consumes about 25 mA of current. If you want to drive a 10inch ² device, choose the lowest HV833 chip. In addition, the second issue in selecting a chip is the problem of how much resistance the device has. In general, an EL element can be represented by an equivalent circuit of a series resistor and a capacitor. In the EL element, the smaller the series resistance value of the equivalent circuit (internal resistance value of the element), the higher the luminance can be realized.

To explain the characteristics of each passive element applied to the circuit in the HV857 chip driver, a diode capable of driving 150V and a fast reverse current cut-off must be applied, and a Cs capacitor is used at 0.003 ~ 0.1uF. . Considering the transformer voltage, capacitors applicable to more than 100V should be used.

REL and RSW can adjust the output frequency to be used. In other words, increasing the value of REL decreases the frequency of the final output stage but increases the output voltage. On the contrary, if the value is lowered, the frequency of the output stage is increased but the output voltage is decreased.

Therefore, reflecting this characteristic has a characteristic of about 205 ~ 275Hz at the reference 2MΩ, it is necessary to select a resistor for the desired frequency band based on this.

In the case of RSW, lowering the resistor value increases the switching frequency of the inductor and lowers the final output voltage. In the opposite case, the final output voltage can be increased.

Lx inductors should use the capacitance given in the reference as possible, but must also observe the DC resistance of the inductor, taking into account the maximum current transfer of the inductors used. The HV857 chip is small and has a DC resistance of about 8.4Ω. The maximum current is also 60mA. Finally, the size of the EL lamp can be selected by selecting the applicable size of the chip, and the power can be adjusted by calculating the power according to the input voltage and the use current to make higher power.

On the other hand, the primary electrode layer 20 can be configured by providing an ITO film layer on the substrate 10 (PEN film), in which case an Ag trace layer is required because ITO is used as the primary electrode layer 20. There will be no. However, the primary electrode layer 20 may be implemented by the ITO film layer to damage the contact portion or the flexible connector, and the Ag trace layer may be separately formed on the ITO film layer.

As described above, the EL display 130 shown in FIG. 2 prints a conductive polymer ink on the substrate 10 to form a first conductive polymer layer 25 including a surface emitting portion and a connection portion of the electrode, and is transparent. By printing Ag on the end of the electrode to form a primary electrode layer 20 made of Ag traces that functions to lower resistance when voltage is applied to the surface emitting portion, the EL phosphor to include a surface connected to the Ag trace portion (EL Phosphor) is printed to form the light emitting layer 30, and the dielectric layer 40 is printed by printing a dielectric to prevent short-circuit of the primary electrode layer 20 and the secondary electrode layer 50 in all regions including the surface light emitting part. Ag paste is formed to form a second conductive polymer layer 55 by printing a conductive polymer ink so as to maintain a work function and light emission stability when voltage is applied. It can be manufactured by the process of forming the secondary electrode layer 50 by printing.

In addition, in the case of using an ITO film such as the EL display 130 illustrated in FIG. 3, since the ITO coating layer forms the primary electrode layer 20, a process of printing Ag traces separately to form the primary electrode layer 20. This eliminates the need for printing the conductive polymer layer 25 between the substrate 10 and the primary electrode layer 20. Accordingly, the EL phosphor is directly printed on the ITO coated surface to form the light emitting layer 30, and then the dielectric layer 40 is printed on the light emitting layer 30 in the same manner as the EL display 130 of FIG. The EL display 130 is cut through a shorter process of printing the conductive polymer layer 55 on the 40 and printing the Ag paste on the conductive polymer layer 55 to form the secondary electrode layer 50. It can manufacture.

The structure of the organic light emitting device using screen printing can be broadly divided into two types: a light emitting device formed on the ITO coating substrate 10 or a light emitting device formed on the transparent electrode substrate 10.

As the EL substrate 10, a PET film on which ITO, which is a transparent electrode, is generally deposited, is used. The ITO electrode not only serves as an electrode but also serves as a window in which the light emitted from the phosphor is emitted. Therefore, a transparent electrode having a resistance of 200 Ω or less while having an average transmittance of more than 90% in the visible light region is widely used. On the other hand, since the PET is used as a transparent and flexible substrate 10, the drying process of the paste does not exceed 150 ° C.

The process of drying the various solvents present in the actual paste is generally performed at 80˚C ~ 150˚C. As a result, when the light emitting device is formed on the ITO-coated substrate 10, the process is simple, and it is preferable that the hygroscopicity and the stability and durability of the device are excellent. In addition, since the cost of the substrate 10 is high and the back light is emitted, the substrate 10 should be transparent.

The thermal sublimation method, which is conventionally used as a method of forming an EL display, has several disadvantages. First, thermal sublimation is a process that requires a vacuum reactor, which places limitations on vacuum equipment operation and reactor size limitations as the demand for larger displays increases. Second, as the process proceeds in vacuo and gives strong heat to the organics, it can also cause material damage along with expensive process costs.

Accordingly, the present invention adopts a printed P-OLED method using a printing technique as a method for improving and replacing the existing process. This is because the printing method enables high-speed, low-cost mass production, a large advantage of reducing the number of processes, and can be applied to various fields with a very low production cost investment for a light source and a low resolution display.

This printing P-OLED has many advantages such as high driving DC voltage, high brightness, various shapes and sizes, light weight, ultra thin film, strong operating life, very low production cost, long operating life, various colors and low voltage operation. .

There are many different types of printing technologies, but screen printing, gravure printing, and inkjet printing are the most common printing technologies in the industry. Applications range from card printing, wrapping paper, wallpaper printing and furniture exterior printing.

Among these, screen printing technology is a method of forming a mold on a mesh of mesh, and printing a thin ink by pushing a printed object through a mesh of squeegee or rubber roller. Screens consist of silk, teflon or metal and are often referred to as silkscreens because they are the technology that began with the first silkscreens.

Screen printing is often used for small prints because of easy plate making and simple equipment. Because of the forced printing format, printing is possible in addition to paper and curved surfaces. When printing using screen printing, resolutions of 35 to 65 LPI (line per inch) can be achieved. LPI is a unit of resolution that indicates the player to be output per inch. The more players, the higher the resolution.

Screen printing can be applied for organic material stack and metal pattern of organic light emitting device as an alternative technology after the conventional sublimation or spin coating because of the simple process and low production cost.

In the embodiments of the present invention, screen printing was used as a printing method to manufacture an electroluminescent display (EL device) for a bakery box using a printing process. The screen printing machine used in this study is an air-driven semi-automatic screen printing machine. The device was fabricated using an alignment screen printer (BS-150ATC. Bando. Co. Ltd.), and the printing conditions were 70 to 80 ° of hardness and a balanced urethane rubber squeegee, and an air pressure of 3 to 5 kgf / cm². The printing pressure was controlled, and the squeegee angle at the time of application and printing was fixed at 80 °. Depending on the type of material and the size of the printing pattern, the separation distance from the plate is 1.2 mm to 2.5 mm, the degree of squeegee pushing is 0.05 to 0.5 mm, and the paste application and printing operation speed is 100 to 220 mm / sec. Adjusted to.

In general, for screen printing, process variables that influence the printing result are speed, pressure, ink rheological properties, and substrate properties. Once the ink and substrate have been determined to the extent that screen printing allows, the variables that affect the printing results in the printing process are speed and pressure.

In general, the higher the speed, the thicker the print thickness and the thinner the line width. This phenomenon can be found in the principle of screen printing. In the case of screen printing, printing is performed using ink ejected through a screen mask by applying pressure with a squeegee. The time for which the screen mask is in contact is shortened.

On the contrary, when the printing speed is slow, the time for the squeegee to press the screen mask is longer, so the printing line width is increased than the reference line width in the printing result. Due to the principle of pressure and speed, the larger the pressure, the larger the printed line width and the smaller the printed thickness.

In addition to the pressure and speed of the process, the ink properties have a great influence on the printing result. The advantage of screen printing is that it is possible to print on materials having various viscosities. Printing is possible for inks with a viscosity of about 500 to 50000 cps, which varies slightly in the process. That is, when shear is applied to the ink due to the printing pressure or speed, the viscosity of the ink changes due to the shear.

Since all the inks used in the EL device fabrication are within the range of viscosity printable by screen printing, EL printing was manufactured by applying screen printing. Most of the inks used in the printed electronics process have a property that the viscosity decreases (shear thinning) when shear is applied, that is, as the shear rate increases. Since such a change in physical properties significantly affects the printing result, when the EL device is manufactured using screen printing, it is necessary to consider not only the pressure and speed, which are process variables, but also the rheological properties of the printed ink.

In the present invention, the mesh count of the screen making produced to perform the screen printing process (mesh count) was used S / T325 SUS mesh (mesh), the mesh tension (mesh tension) is 1.02mm / kgf ~ 1.04mm / kgf, mesh thickness was 28 μm, emulsion thickness was 5 μm, and the mesh angle was 22.5 °.

The photosensitive emulsion used in the plate making was a dual curing type having excellent resolution and solvent resistance, and a photosensitive emulsion containing fluorinated resin was used for the purpose of preventing bleeding of the paste during printing.

The SUS mesh used in the present invention has excellent paste ejection property and dimensional property including solid content and fine particles, and all six plates required for forming an organic light emitting device were manufactured to the same specifications and dimensions as described above.

In order to fabricate the organic light emitting device of the surface emitting type, two devices were designed for each layer under the 'PARIS BAGUETTE' and KIMM R2R PEMS logos having a light emitting area of 45 × 75mm within a printing area of 150 × 150mm.

Hereinafter, to summarize the main matters once again to help the understanding of the present invention.

Printing conditions were hardness 70 ~ 80 °, using a balanced urethane rubber squeegee, and the printing pressure was adjusted by the air pressure of 3 ~ 5kgf / cm², the squeegee angle during application and printing was fixed at 80 °. Depending on the type of material and the size of the printing pattern, the separation distance from the plate is 1.2 mm to 2.5 mm, the degree of squeegee pushing is 0.05 to 0.5 mm, and the paste application and printing operation speed is 100 to 220 mm / sec. The hardness, pressure, separation distance, etc. are conditions under which front printing can be performed without defects in consideration of the correlation between the material and the substrate 10, printability, and the like during screen printing.

In addition, as a dielectric material, a material having a high dielectric constant used in the present invention may include SrTiO ₃ , BaTa ₂ O _6, etc. in addition to BaTiO _3. In the present invention, BaTiO ₃ is used, and a dielectric material using floro resin is used as the binder material. Ink: EL5500 was used.

The reason for using BaTiO ₃ as a dielectric is that the phosphor (EL) ink manufactured for screen printing of zinc sulfide (ZnS) component is used: EL 5400 (Ormecon). Table 1 below.

Material name Dielectric constant PbTiO ₃ ~ 200 SrTiO ₃ 332 KNbO ₃ 700 BaTiO ₃ ~ 3600

In the present invention, a zinc sulfide (ZnS) series light emitting layer 30 was used, and BaTiO ₃ , which is a dielectric most suitable for this type of light emitting layer 30, was used. It can be said that the technology for the EL display according to the material correlation is realized through the concept of printed electronics and a device having a miniaturization or flexibility to be incorporated in a box (for example, a bakery box).

In addition, the ITO electrode not only functions as an electrode but also serves as a window in which the light emitted from the phosphor is emitted. Therefore, a transparent electrode having a resistance of 200 Ω or less while having an average transmittance of more than 90% in the visible light region is widely used. On the other hand, since the PET is used as a transparent and flexible substrate 10, the drying process of the paste does not exceed 150 ° C. This is a basic specification for ITO, which is usually used as a transparent electrode.

In addition, in the present invention, since the PET, which is a transparent and flexible substrate 10, is used, the drying process of the paste does not exceed 150 ° C. The reason is that since the Tg temperature of the flexible plastic film (PET) is usually 150 ° C., the shrinkage and expansion of the film may occur under drying conditions exceeding 150 ° C., thereby causing defects and abnormalities of the device. This is the basic drying threshold temperature provided for the flexible film.

On the other hand, the process of drying the various solvents present in the actual paste is generally performed in the range of 80 ℃ ~ 150 ℃. The reason is that the additives present in the paste are dispersants, solvents, etc. These are usually used to make solution-type materials, evaporate through drying, and leave only solids, each of which has drying conditions. Each material is used to limit the temperature at which the dispersing agent and the solvent can fly, but the lower the temperature, the more advantageous it is.

In addition, two devices were designed for each layer under the 'PARIS BAGUETTE' and KIMM R2R PEMS logos, each having a 45 × 75mm light emitting area within 150 × 150mm printing area, to produce a surface-emitting type organic light emitting device. The 'PARIS BAGUETTE', KIMM R2R PEMS 'logo having a 75mm emission area substantially becomes the phosphor (EL) layer. If the printing area of the screen printing machine is 150 × 150 mm, a 45 × 75 mm light emitting area is realized in such an area.

In general, EL devices operate in the range of 100 to 300 V AC. The EL display of the present invention can be driven using only the battery 1 power source through the drive controller 2. That is, the drive control unit (drive driver) serves to convert and amplify the DC voltage generated from the battery 1 to AC. For example, a module can be attached to a space of about 2 cm x 2 cm in a corner of a bakery box, and can be connected to an EL display outside the box by a wire or a printed line.

On the other hand, the EL display of the present invention prevents the direct connection (short circuit) of ITO (or Ag electrode or conductive polymer) used as the primary electrode, the EL phosphor used for the light emitting layer 30, the primary electrode and the secondary electrode. And a secondary electrode. The difference and structure may vary depending on the material of the substrate 10 or the electrode material. In the present invention, the electric circuit can be driven as long as there is a line connecting the drive module (drive controller) and the EL element (display).

In addition, the reason why the EL driving module is configured as an inductor is explained. Among the EL driving elements, the inductor is mainly used for voltage conversion and the like. However, when the device of the present invention has an inductor, the driver circuit becomes large. In general, since the inductor has the largest size among passive devices, it is implemented as an inductor because a small driver should be implemented in a device requiring mobility if possible or a box employing the present invention. The HV850 chip is an inductorless driver chip among EL driver chips.

On the other hand, the EL element and the control unit may be connected to a portion having the same electrical polarity. In other words, the ITO used as the positive electrode is connected to the positive electrode (that is, the positive electrode of the battery) connected through the battery and the control unit, and the Ag used as the negative electrode is connected to the negative electrode (ie, the negative electrode of the battery) connected through the battery and the control unit. . PEN films do not have electrical properties unlike ITO films. In other words, the ITO film is made by depositing a material called ITO on the PEN film and contains ITO which can be used as an electrode. Therefore, when using a PEN film, a layer used as the primary electrode is required, wherein the layer used as the primary electrode is an Ag trace and a conductive polymer. Ag forms an opaque thin film when printed. When the opaque electrode is formed on both sides, the light emitting part disappears, so the conductive polymer used as the transparent electrode is printed and the conductive polymer is used as the transfer layer for sending the electricity sent from the Ag trace to the EL phosphor layer. use. Secondary electrodes also use a conductive polymer for the same reason. In summary, the portion in direct contact with the EL layer is a conductive polymer layer and the electrical signal is transmitted through the Ag trace layer. In the present invention, the Ag trace primary electrode layer 20 is printed on the transmissive first conductive polymer layer 25 in a form bordering the light emitting area, and the Ag trace secondary electrode layer 50 is formed on the back of the EL element. Since it is preferable to prevent the light from going out, it is printed to cover the entire surface of the transparent second conductive polymer layer 55.

In the drawing, reference numeral 22 denotes a terminal part (having a lead wire function) for connecting to a power source such as a battery, and reference numeral 52 also denotes a terminal part for connecting to a power source such as a battery.

In the present invention, the phosphor (EL) layer of the EL element forms the light emitting layer 30 for electroluminescence. In addition, it is possible to print a portion other than a required character, for example, 'PARIS BABUETTE', so that the light is emitted only in the region except for the corresponding character.

Meanwhile, the present invention may be applied to a bakery box as an example of a packaging material. The switching on / off operation between the switching element and the EL element controller provided in the bakery box may be performed by adding a switch to the controller.

The switching element and the EL element control unit may be circuitized and connected by wires, or a method of printing (patterning) an electrode pattern on a box and connecting it with a circuit and an electric wire is also possible.

On the other hand, in order to emit light of the large area EL, an EL driving element (a driving element such as the Supertex HV857 chip) including an inductor is used. In the case of small area EL light emission, the inductorless chip can be used because the power consumption is small. However, in the case of the large area, inductorless chip such as the HV850 chip may not be able to emit light due to lack of power. Therefore, by using the HV857 chip, which can be implemented as an inductor, the controller can be manufactured to emit a larger area of light.

On the other hand, in general, an EL element can be represented by an equivalent circuit of a series resistor and a capacitor, and the lower the series resistance value (internal resistance value of the circuit) of the equivalent circuit in the EL element, the brighter brightness is possible. The EL element itself can realize an equivalent circuit of an electrical circuit with a series resistor and a capacitor. Since the light emitting device converts electricity into light energy, it can be expressed as a capacitor such as a battery that consumes electricity or retains electricity. In addition, all devices are designated as internal series resistors because they have an internal resistance. The whole EL element is represented by an equivalent circuit.

In addition, in the HV857 chip driver, a diode capable of driving 150V and a fast reverse current blocking diode, BAS21 or SB01-15, should be applied. The reason is that the EL element is electrically supplied with an alternating voltage to supply the element. That is, since the AC itself is switched to +,-and is supplied at a constant frequency, the frequency that can be actually supplied by the driving device of the present invention has a high frequency (1 to 2 kHz), so that a reverse current due to fast switching is required to have a good effect. Because it can.

According to the present invention having such a configuration, when the handle on the bakery box is held by hand, the switching element is switched on or when the switching element is switched on by pressing a switching element provided in the bakery box through a control unit. Main power (battery power in the present invention) is applied to the flexible electroluminescent display module to emit light in the light emitting layer 30.

As described above, the present invention emits various logos or characters patterned on the flexible electroluminescent display module or various advertisement texts or manufacturing dates, thereby maximizing the visual effect of logos or characters displayed on packaging materials such as a bakery box from consumers. Can generate a lot of interest and contribute significantly to the desire to buy.

It is no exaggeration to say that packaging has become a factor in the bakery's image and sales. In other words, the packaging was originally created for the purpose of storing and transporting the product, but the importance of packaging has recently increased, and it is the packaging that makes the product stand out as well as the taste and product power. The EL device of the present invention, the flexible electroluminescent display module emits light, so that various patterned logos or characters or various advertisement texts or manufacturing dates can be self-emitted, thereby maximizing the visual effect of the logo or letters of the bakery box. This, in turn, can generate a lot of interest from the consumer and contribute significantly to the desire to purchase. That is, the present invention is to give the wings to make the product stand out as well as the taste and product power of the bakery product.

A display that is strongly entering recently is an EL display, which is superior to LCD in response speed, viewing angle, sharpness, power consumption, volume and weight, productivity and price. In particular, ELD, unlike LCD, FED, and PDP, is a flat panel display made of film and flexible material.The next-generation display is due to advantages such as wide use temperature range, impact resistance, wide viewing angle, high speed response, low power, and ease of manufacture. It is expected to occupy an important part of the market.

In view of these various flexible display technologies in terms of materials, a method of stabilizing modes by mixing polymers with nematic, cholesteric, and flexible liquid crystals, a method using an organic electroluminescent material having self-luminous properties, and a charge Electrophoretic method using a microparticle pigment.

Flexible displays can be distinguished into displays that are not rugged, bent, or rollable in purpose and function. In the short term, lightweight, rugged, and bendable displays can be used for high-end mobiles, such as DMB, WiBro, and PDA.

The EL device of the present invention, which can be widely applied as a flexible display and a light emitting device, has a good mechanical property and a simple manufacturing process, and thus has various applications in not only a display but also a daily life. It has many advantages in weight, volume, manufacturing cost, and ease of manufacture compared to a billboard with a built-in fluorescent lamp or other lighting.

On the other hand, the EL device of the present invention can be composed of a polymer transparent electrode, especially the primary electrode layer 20, when the primary electrode layer 50 is composed of a polymer transparent electrode, light is not transmitted when the EL device is emitted. Since no edge portion is generated, a more beautiful effect can be obtained at the time of driving light emission, and furthermore, an effect such as higher commercial property can be obtained.

In addition, although not shown, as a means for covering and protecting each layer printed on the opposite side of the substrate 10, that is, the outside of the secondary electrode layer 50, a thin cover member may be joined by bonding or the like. In addition, a coating material for forming a protective film may be provided by a method such as painting. The cover member or coating material may be made of the same material as the substrate 10. When the cover member or the coating material is provided on the outside of the secondary electrode layer 50 as described above, the substrate 10 side may be coupled to the surface of the packaging material and the cover member or the coating material toward the outside. That is, the light of the light emitting layer 30 is emitted through the cover member or the coating material by forming the cover member or the coating material as a light-transmissive material, and forming the secondary electrode layer 50 in the form of a hollow border. It can be configured to.

In addition, the packaging material of the present invention uses the packaging material as a substrate without the separate substrate 10 described above, that is, the packaging material itself, the primary electrode layer 20, the light emitting layer 30, the dielectric layer 40, the secondary electrode layer 50 ) May be printed. Also in this case, the first conductive polymer layer 25 and the second conductive polymer layer 55 may be selectively provided, and the dielectric layer 40 and the secondary layer may emit light to the outside of the light emitting layer 30. The electrode layer 50 is made of a light-transmissive material or is formed in a shape capable of emitting light as described above. In addition, the above-mentioned transparent cover member or coating material is preferably provided outside the secondary electrode layer 50.

In addition, the dielectric layer 40 may be provided between the light emitting layer 30 and the secondary electrode layer 40 as shown in consideration of the emission direction of light, and the light emitting layer 30 and the primary electrode layer 20 It may be provided between.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various permutations, modifications, and changes can be made without departing from the spirit of the present invention. It will be apparent to those who have it.

10: substrate 20: primary electrode layer
25, 55: conductive polymer layer 30: light emitting layer
40: dielectric layer 50: secondary electrode layer
120: body 122: handle
130: EL display 141a, 141b, 142: switch
150: sound generating device

Claims (19)

A main body in which the product is accommodated;
An EL display provided in the main body to emit light upon application of power; And
A drive control unit provided in the main body to supply operation power to the EL display,
The EL display includes a substrate, a light emitting layer made up of a primary electrode layer provided on the substrate, an EL phosphor printed on top of the primary electrode layer, a secondary electrode layer printed on top of the light emitting layer, and a light emitting layer and a primary electrode layer. A dielectric layer printed therebetween, or between the light emitting layer and the secondary electrode layer,
The light of the light emitting layer generated by the operating power applied to the primary electrode and the secondary electrode through the driving control unit is emitted to the outside through the substrate or the secondary electrode layer
A packaging material having a light emitting display.
A main body in which the product is accommodated;
An EL display provided in the main body to emit light upon application of power; And
A drive control unit provided in the main body to supply operation power to the EL display,
The EL display includes a primary electrode layer printed on the surface of the main body, a light emitting layer made of an EL phosphor printed on top of the primary electrode layer, a secondary electrode layer printed on the light emitting layer, and the light emitting layer and the primary electrode layer. A dielectric layer printed therebetween, or between the light emitting layer and the secondary electrode layer,
Light of the light emitting layer generated by the operating power applied to the primary electrode and the secondary electrode through the driving control unit is emitted to the outside through the secondary electrode layer
A packaging material having a light emitting display.
The method of claim 1,
The substrate is made of a flexible substrate
A packaging material having a light emitting display.
The method according to claim 1 or 2,
The main body is provided with a switch connected to the driving control unit to turn on / off the power applied to the primary electrode layer and the secondary electrode layer.
A packaging material having a light emitting display.
The method according to claim 1 or 2,
The main body is provided with a handle including two or more gripping pieces, provided with a switch that is energized when the gripping pieces contact each other
A packaging material having a light emitting display.
The method according to claim 1 or 2,
Equipped with a sound generating device for outputting sound in accordance with the power supply to the main body
A packaging material having a light emitting display.
The method according to claim 6,
The sound generating device is connected to the driving control unit to control operation of the EL display.
A packaging material having a light emitting display.
The method of claim 2,
The first conductive polymer layer is printed between the main body and the primary electrode layer
A packaging material having a light emitting display.
The method according to claim 1 or 2,
The primary electrode layer is made of an Ag trace layer printed Ag paste
A packaging material having a light emitting display.
The method of claim 1,
The substrate and the primary electrode layer is made of an ITO coating film
A packaging material having a light emitting display.
The method of claim 10,
Ag trace layer is printed on the ITO coating film
A packaging material having a light emitting display.
The method of claim 1,
A first conductive polymer layer is printed between the substrate and the primary electrode layer,
The primary electrode layer is formed in the form of a border with an empty inside,
The light emitting layer is printed such that a circumference thereof is in contact with the primary electrode layer and an inner portion thereof is in contact with the first conductive polymer layer.
A packaging material having a light emitting display.
The method according to claim 8 or 12, wherein
The second conductive polymer layer is printed between the light emitting layer and the secondary electrode layer.
A packaging material having a light emitting display.
The method of claim 13,
The secondary electrode layer is printed to cover the entire surface of the second conductive polymer layer.
A packaging material having a light emitting display.
The method of claim 1,
The primary electrode layer is printed in the form of a border so that the light transmitting portion is formed therein, and the secondary electrode layer is printed in the form of covering the opposite side to emit light through the light transmitting portion of the primary electrode layer.
A packaging material having a light emitting display.
The method according to claim 1 or 2,
A cover member or a coating material is provided on the secondary electrode layer to cover any one or two or more of the primary electrode layer, the light emitting layer, the dielectric layer, and the secondary electrode layer.
A packaging material having a light emitting display.
The method of claim 1,
The substrate is made of a light transmitting film
A packaging material having a light emitting display.
The method according to claim 1 or 2,
At least one of the primary electrode layer and the secondary electrode layer is made of a polymer transparent electrode
A packaging material having a light emitting display.
The method according to claim 1 or 2,
The body is made of a bakery box
A packaging material having a light emitting display.

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