KR101036356B1 - Transparent organic light emitting diode display apparatus with solar cell and method for manufacturing thereof - Google Patents

Abstract

Disclosed are a transparent organic light emitting diode display device having a solar cell and a method of manufacturing the same. An organic light emitting diode display device according to an embodiment of the present invention includes a display unit including a transparent organic light emitting diode (OLED) display and a driving circuit; A solar cell formed directly below the transparent organic light emitting diode display and converting light into electricity to assist device power; And a transparent intermediate layer formed between the transparent organic light emitting diode display and the solar cell to perform an insulation function and controlling the transmittance of light reaching the upper portion of the solar cell, wherein the transparent intermediate layer is formed in a multilayer structure. Or a transmittance adjusting element capable of electrically adjusting the transmittance of the light.

Transparent organic light emitting diode (OLED), transparent intermediate layer, solar cell, display

Description

Transparent organic light emitting diode display device having a solar cell and a manufacturing method therefor {TRANSPARENT ORGANIC LIGHT EMITTING DIODE DISPLAY APPARATUS WITH SOLAR CELL AND METHOD FOR MANUFACTURING THEREOF}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transparent organic light emitting diode (OLED) display, and more particularly, to form a solar cell directly below a display based on a transparent OLED, and to provide an insulating function between the solar cell and the display and the light reaching the solar cell. By forming a transparent intermediate layer to control the transmittance, it absorbs the light and sunlight output from the OLED to the solar cell side to assist the power of the device with a transparent OLED display, thereby increasing the battery life of the device It relates to a transparent organic light emitting diode display device having a and a method of manufacturing the same.

Recently, with the progress and demand of portable multimedia devices, display devices using organic light emitting diodes (OLEDs), which have advantages such as wide viewing angle, response speed, self-luminous, and low power consumption, have been in the spotlight.

Such display devices are applied to devices such as laptops, portable phones, MP3s, and PMPs, and the power of the devices is supplied from rechargeable batteries manufactured in consideration of device sizes.

That is, the use time of the device is determined by the charge capacity of the battery. Since the charge capacity of the battery is limited, the use time of the device is limited by limiting the power supply of the device.

Therefore, it is necessary to develop a technology for a method that can use the device for a long time. In the past, the focus was on the development of a low power display driving technology and a power saving algorithm under a limited power environment, but the finite battery charge capacity is fundamentally limited in extending the portable use time. There must be.

Recently, as an alternative, a method of attaching a solar cell to a display or a non-special space such as the back of a portable device has been proposed to supply or charge some power from sunlight.

As an example according to the prior art using a solar cell, Korean Patent Publication No. 2008-0065120 discloses a technique of using a dye-sensitized solar cell as an upper polarization layer of an organic light emitting display, and the dye-sensitized solar cell is a transmission type. In this case, the efficiency is limited, so the efficiency is limited. When the device is in use, the light emitted from the outside of the display is also absorbed, which may affect the display brightness and consume additional power to compensate for the brightness. .

As another example, Korean Patent Publication No. 2005-0035595 is a technique for forming a solar cell and an organic electroluminescent device on the same substrate, and using an amorphous silicon solar cell, the efficiency is relatively high, but individual devices are disposed on the same plane. As a result, a separate space other than the display is required, which leads to a problem that space utilization and practicality are inferior.

An object according to an embodiment of the present invention devised to solve the above problems is to provide a solar cell directly below the transparent OLED display, and by adjusting the transmittance of light input to the solar cell, output from the OLED to the solar cell side The present invention provides a transparent organic light emitting diode display device having a solar cell capable of absorbing light and sunlight and assisting the power of the device, thereby increasing the battery life of the device, and a method of manufacturing the same.

More specifically, the present invention lowers the transmittance of light in the transparent intermediate layer that performs the insulation function between the transparent OLED display and the solar cell, and increases the contrast while lowering the transparent OLED, and emits light emitted from the lower portion of the transparent OLED. To minimize light loss by reflecting the light upwards, and transparent organic light emitting diode display device having a solar cell that can maximize the amount of light transmitted to the solar cell by increasing the transmittance when the transparent OLED is not operating and its manufacture To provide a method.

In order to achieve the above object, a transparent organic light emitting diode display device according to an aspect of the present invention includes a display unit including a transparent organic light emitting diode (OLED) display and a driving circuit; A solar cell formed directly below the transparent organic light emitting diode display and converting light into electricity to assist device power; And a transparent intermediate layer formed between the transparent organic light emitting diode display and the solar cell to perform an insulation function and to adjust the transmittance of light reaching the upper portion of the solar cell.

The transparent intermediate layer may be formed in a multilayer structure, and the first transparent insulating layer and the second transparent insulating layer having different refractive indices may be repeatedly formed a predetermined number of times, and the first transparent insulating layer may be formed of a high refractive index material having a predetermined refractive index or more. The second transparent insulating layer may include a low refractive index material of less than the predetermined refractive index.

The electrode of the transparent OLED display and the electrode of the solar cell may be a multilayer thin film electrode of a transparent insulating layer / metal thin film layer / transparent insulating layer having a predetermined refractive index.

The transparent intermediate layer may include a transmittance adjusting element capable of electrically adjusting the transmittance of the light.

According to an aspect of the present invention, a method of manufacturing a transparent organic light emitting diode display includes a transparent upper electrode on a substrate, and converting light into electricity to form a solar cell that assists power of a device; Forming a transparent intermediate layer on the front surface of the solar cell to control the transmittance of light reaching the upper part of the solar cell; And forming a transparent organic light emitting diode display on an upper surface of the upper portion of the transparent intermediate layer at a top end of the solar cell.

According to another aspect of the present invention, a method of manufacturing a transparent organic light emitting diode display includes forming a transparent organic light emitting diode display on a first transparent substrate; Forming a solar cell structure by including a transparent electrode on the second transparent substrate and converting light into electricity to form a solar cell to assist the power of the device; And bonding the first transparent substrate to an upper portion of the solar cell structure such that the solar cell is formed directly below the transparent organic light emitting diode display.

Other objects and features of the present invention in addition to the above objects will be apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, a transparent organic light emitting diode display device having a solar cell and a method of manufacturing the same according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 7. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a cross-sectional view of a transparent organic light emitting diode display device according to an embodiment of the present invention.

Referring to FIG. 1, the transparent OLED display device includes a display unit, a transparent intermediate layer 120, and a solar cell 130.

The display unit includes a transparent OLED display 110 for a display and a driving circuit for driving the same.

The transparent OLED display 130 includes transparent OLED devices capable of emitting red, green, blue, and white colors. In the case of a low-resolution small display within a diagonal of 1 to 2 inches, a passive matrix type is simple to manufacture. In most cases, an active matrix method having advantages such as low power driving and vivid image quality may be used.

This transparent OLED requires a transparent electrode for both the upper electrode and the lower electrode. The transparent electrode includes a metal oxide based electrode including ITO, a metal thin film electrode including Ag, Au, Cu and CNT, and a polymer including PEDOT: PSS. It may be formed of any one of a multilayer thin film electrode consisting of an electrode and a dielectric-metal-dielectric. Of course, the material for the transparent electrode is not limited to the above-described material, it is apparent to those skilled in the art that all materials that can be used as the transparent electrode can be used.

The transparent OLED has a light emitting layer in which excitons bind, an electron and hole transport layer, an injection layer, and a plurality of organic / inorganic layers to improve optical / electrical properties according to the color emitted between the upper and lower transparent electrodes. Can be.

The driving circuit may be formed by applying a process for implementing a conventional passive type and an active type. The transparent intermediate layer 120 selectively divides a charge / non-charge mode in consideration of compatibility with a solar cell and adjusts transparency accordingly. It is desirable to include a switching circuit capable of synchronizing the operation mode change of).

Furthermore, a pixel defining layer, a polarizing layer, a surface protection film, a top protective film, and the like applied to a typical OLED display may be positioned on the transparent OLED.

The solar cell 130 is formed directly below the transparent OLED display 110 and converts light into electricity to assist the power of the device. The solar cell 130 may be formed on the substrate 140.

In this case, the solar cell 130 preferably forms an electrode of a portion adjacent to the transparent intermediate layer 120 as a transparent electrode in order to absorb the light coming through the transparent intermediate layer 120, and the transparent electrode includes a metal including ITO. It may be formed of any one of an oxide-based electrode, a metal thin film electrode including Ag, Au, Cu, and CNT, a polymer electrode including PEDOT: PSS, and a multilayer thin film electrode made of a dielectric-metal-dielectric.

In addition, since the solar cell 130 is not electrically connected to the transparent OLED display 110, the solar cell 130 is not limited in selecting a material, and the solar cell 130 includes crystalline silicon solar cells, amorphous silicon solar cells, and GaAs. And a group 5 solar cell, a CIGS (Cu, In, Ga, Se compound) solar cell, a fuel-sensitive solar cell, or an organic based solar cell.

Of course, the solar cell 130 may be selected in consideration of the advantages of efficiency, cost, mass production process, etc., which may be determined according to the requirements of the manufacturer, such as area, efficiency, bending characteristics or weight.

Further, the solar cell 130 is an electrode formed in the opposite direction of the transparent intermediate layer 120, for example, when the transparent upper electrode of the solar cell 130 and the transparent intermediate layer 120 are adjacent to the lower electrode of the solar cell also as a transparent electrode. This is because the light incident from the back of the display is also absorbed, thereby increasing the light absorbing ability of the solar cell can further assist the power of the device. Of course, when the transparent intermediate layer is formed thereon in a state where the solar cell is formed on the substrate, the substrate on which the solar cell is formed is preferably a transparent substrate.

The transparent interlayer 120 is formed between the transparent OLED display 110 and the solar cell 130 to optically and physically connect the transparent OLED display 110 and the solar cell 130 and to perform electrical insulation. It controls the transmittance of light reaching the top of the solar cell.

At this time, the transparent intermediate layer 120 is a solar cell of the solar cell using a transmittance control element for controlling the transmittance of light reaching the upper portion of the solar cell through a multilayer structure in consideration of the refractive index of the transparent material or by adjusting the electrical characteristics of the solar cell The light absorption ability can be improved.

In order to understand or optimize the optical characteristics of the multilayer structure of the transparent intermediate layer 120, a method known in thin film optics, for example, an optical admittance method of thin film optics, which has been widely used in optical coatings, may be used, which is based on the optical admittance method. The lower surface can predict the optical properties of the thin film, reflection, transmission, and absorption, thereby optimizing the multilayer structure of the transparent intermediate layer irrespective of the type of solar cell device at the bottom.

As described above, the structure of the transparent intermediate layer capable of adjusting the light transmittance for adjusting the amount of light transmitted to the solar cell 130 will be described as an example.

1) As shown in FIG. 2, the transparent intermediate layer 220 may be formed in a multilayer structure in which the first transparent insulating layer 221 and the second transparent insulating layer 222 having different refractive indices are repeated a predetermined number of times. The refractive index of the first transparent insulating layer 221 may be greater than or equal to a preset reference refractive index, and the refractive index of the second transparent insulating layer 222 may be less than the reference refractive index, or vice versa.

Here, the first transparent insulating layer 221 may be formed of any one of a high refractive index material ZnS, TiO ₂ and WO ₃ , the second transparent insulating layer 222 is a low refractive index material MgF ₂ , Na ₂ may be formed of AlF ₆ and SiO _2. The deposition of the first transparent insulating layer 221 and the second transparent insulating layer 222 may be performed by considering the effect on the solar cell 230. And a method compatible with the transparent OLED fabrication process without incurring additional costs is preferable.

Here, the high refractive index material refers to a material having a refractive index higher than that of the transparent substrate on which the first and second transparent insulating layers 221 and 222 are stacked. Likewise, the low refractive index material has a refractive index lower than that of the transparent substrate. Means a substance with

Since the transparent intermediate layer 220 must perform a function of electrically insulating the solar cell 230 and the transparent OLED display 210, energy level characteristics should be considered so that electrical interworking does not occur from the transparent electrodes used at both sides.

In addition, when optimizing the transparent intermediate layer, the absorption characteristics (Absorbance) according to the wavelength of the lower active solar cell layer should be considered.

2) As shown in FIG. 3, the transparent intermediate layer 320 is formed as one transparent insulating layer, but the transparent upper electrode of the solar cell 330 and the transparent lower electrode of the transparent OLED display 310 are formed as a transparent insulating layer ( By forming the multi-layered thin film electrodes 315 and 335 of the 311 and 331 / metal thin film layers 312 and 332 and the transparent insulating layers 311 and 331, and using the high refractive index material as the transparent insulating layer of the multi-layered thin film electrode 1 You can also adjust the light transmittance, such as).

That is, although the transmittance of only the metal thin film layer is difficult to exceed 30-50 [%] in the thickness of 10-20 [nm], the three-layer structure is formed by forming a high refractive index transparent material having an appropriate thickness on the upper and lower portions of the metal thin film layer. A high conductivity transparent electrode having a high transmittance of 85 [%] or more and a sheet resistance of 10 or less [Ω / sq.] Can be made.

In this case, the transparent insulating layers 311 and 331 of the multilayer thin film electrodes 315 and 335 may be formed using high refractive index materials such as NiO, ZnS, TiO _2, and WO ₃ , and the metal thin film layers 312 and 332 may be formed. A metal such as Ag, Au, Cu, or the like may be used to sufficiently secure the conductivity, and in order to control light transmittance, it is preferable to adjust the thickness and refractive index of the individual layers constituting the multilayer thin film electrode.

In addition, the transparent insulating layer adjacent to the active layer of the transparent OLED display 310 or the solar cell 330 should have a semiconductor characteristic having an appropriate energy level so that there is no separate energy barrier in injection or acquisition of charge. .

Although the transparent intermediate layer is illustrated as one transparent insulation layer in FIG. 3, a transparent insulation layer having a multilayer structure including a transparent insulation layer of the multilayer thin film electrode may be defined as a transparent intermediate layer.

3) As shown in FIG. 4, the transparent intermediate layer 420 may be formed using a transmittance adjusting element that can electrically adjust the transmittance of light. The transmittance adjusting element absorbs light when the light passes through the element. It can be divided into a light absorption type to adjust the transmittance by adjusting the light reflection type to adjust the light transmittance by adjusting the reflectance of light and a mixture thereof, the transmittance adjusting element in the present invention may include all three forms Can be.

That is, the transparent intermediate layer 420 may include electrochromic materials including Viologen, Polyoxotungstates, NiO _x , TiO _2, and WO ₃ whose transmittance is controlled according to an electric field, polymer-dispersed iquid crystals (PDLC), reflective liquid crystals, By forming by using any one of a transmissive liquid crystal and a light control film which can be switched to a transparent state and a mirror state, it is possible to control the amount of light transmitted to the solar cell 430 by adjusting the voltage applied to the transmittance adjusting element. Not limited to one transmittance adjusting element, any element capable of adjusting transmittance may be applied.

As can be seen, the transmittance adjusting element includes an electrode for receiving a voltage, and the first electrode may use the transparent lower electrode 411 of the transparent OLED display 410 to which the ground voltage is applied, and the second electrode. The 421 may include a separate transparent electrode to apply a voltage, and include a transparent insulating layer 422 to insulate between the second electrode 421 and the transparent upper electrode 431 of the solar cell 430. Can be.

Such a transparency control element is very transparent, opaque, or mirror-like depending on whether or not a specific electric field is applied. By using this characteristic, the transparent OLED display is transparent to deliver maximum light to the solar cell when the OLED is not operating. On the contrary, when the transparent OLED display is operated, the transmittance may be lowered to increase contrast or increase the reflectivity, thereby minimizing light loss by reflecting light emitted from the lower portion of the transparent OLED display and leaking upward.

In particular, the transmittance adjusting element preferably has a low power consumption or no need for simple maintenance after the transmittance is set. For example, an in-plane electrophoretic element requiring power consumption only when the transmittance or reflectivity is changed. Or elements having bistability such as ferroelectric liquid crystals.

As such, the transparent intermediate layer can control the amount of light transmitted to the solar cell using various structures, and when the transparent OLED display, the solar cell and the transparent intermediate layer are manufactured, they can be laminated by a method such as lamination. In the case where the manufacturing process of the transparent intermediate layer and the manufacturing process of the transparent OLED are compatible, the manufacturing cost may be reduced by manufacturing the transparent intermediate layer and the transparent OLED through continuous deposition on the fabricated solar cell.

As described above, the structure of the transparent intermediate layer has been described, but is not limited thereto, and the transparent intermediate layer is formed using a transparent substrate used to form a solar cell, a transparent substrate used to form a transparent OLED display, or the like. You may. That is, by forming a solar cell on the first transparent substrate, forming a transparent OLED display on the second transparent substrate and then bonding the two transparent substrates, a transparent intermediate layer consisting of the first transparent substrate and the second transparent substrate is formed or A transparent intermediate layer made of a second transparent substrate may be formed.

In this case, the light transmittance may be adjusted by adjusting the refractive index of the first transparent substrate and / or the second transparent substrate.

Such a transparent OLED display device according to an embodiment of the present invention is provided with a solar cell directly below the transparent OLED display, and outputs from the OLED to the solar cell side by controlling the transmittance of light input to the solar cell using a transparent intermediate layer. It absorbs the light and sunlight that is added to help the device power up, which can extend the battery life of the device.

In addition, by electrically adjusting the transmittance of the light according to the operation of the transparent OLED display, it is possible to increase the contrast of the display device, and to minimize the light loss by reflecting the light emitted from the lower portion of the transparent OLED display to the upper, If necessary, the transmittance can be increased to maximize the amount of light transmitted to the solar cell.

5 is an operation flowchart of a method of manufacturing a transparent OLED display according to an embodiment of the present invention.

Referring to FIG. 5, the method of manufacturing a transparent OLED display converts light into electricity on a substrate to form a solar cell that assists power of the display device (S510).

In this case, the solar cell is preferably formed of an upper electrode as a transparent electrode. When the substrate on which the solar cell is formed is a transparent substrate, the lower electrode of the solar cell is also formed as a transparent electrode, thereby receiving light input from the bottom of the display device. It may further absorb to improve the light absorbing ability.

The electrode constituting the solar cell may be formed of a single thin film, but may be formed of a multilayer thin film electrode of a transparent insulating layer / transparent electrode / transparent insulating layer. The structure of the electrode is based on the structure of the transparent intermediate layer formed on the solar cell. This may vary depending on the case where the light transmittance is controlled only by the transparent intermediate layer and when the light transmittance is controlled by the electrodes of the transparent intermediate layer and the solar cell and the transparent OLED display. Since the description is omitted.

When the solar cell including the transparent upper electrode is formed, to form a transparent intermediate layer for controlling the transmittance of light transmitted to the solar cell on the solar cell (S520).

In this case, the transparent intermediate layer for adjusting the light transmittance may be formed using a transparent insulating layer having a multi-layer structure, or may be formed using a transmittance adjusting element in which light transmittance is electrically controlled by an electric field.

For example, the transparent intermediate layer may be formed by repeatedly forming a transparent insulating layer having a predetermined first refractive index and a transparent insulating layer having a second refractive index a predetermined number of times, and by using a method known to thin film optics, the refractive index of the transparent insulating layer The thickness, the number of transparent insulating layers, etc. may be determined, and thus the light transmittance may be controlled.

Here, the transparent insulating layer having the first refractive index may be formed by ZnS, TiO ₂ , WO _3, etc., which are high refractive index materials, and the transparent insulating layer having the second refractive index may be MgF ₂ , Na ₂ AlF ₆ and SiO _{2 or the} like.

Of course, as in the example shown in Figure 6, by sequentially forming a plurality of transparent insulating layer having a different refractive index to the transparent intermediate layer, the transmittance of light may be adjusted.

That is, by repeating a series of processes to form a first transparent insulating layer on the solar cell, the second transparent insulating layer formed on the solar cell until the Nth transparent insulating layer is formed, the transmittance of light is controlled. A transparent intermediate layer may be formed (S610 to S630).

In this case, the refractive index of each of the transparent insulating layers and the number of transparent insulating layers may vary depending on the light transmittance to be controlled.

In the step of forming a transparent intermediate layer, a method of forming a transparent intermediate layer using a transmittance control element is to form a transparent insulating layer for insulation on top of the solar cell, and a transparent electrode for inputting a voltage to the transmittance control element thereon After formation, a permeability control material on top thereof, ie electrochromic material including Viologen, Polyoxotungstates, NiO _x , TiO ₂ and WO ₃ whose permeability is controlled according to the electric field, polymer-dispersed iquid crystals (PDLC), reflection A transparent intermediate layer can be formed by forming a transmittance adjustment layer using any one of a type liquid crystal, a transmissive liquid crystal, and a light control film which can be switched between a transparent state and a mirror state.

Here, the other electrode for applying a voltage to the transmittance adjusting element may use a transparent lower electrode of the transparent OLED in common, and thus it is not necessary to form a separate transparent electrode.

When the transparent intermediate layer is formed, a transparent OLED display is formed on the transparent intermediate layer, and the transparent OLED display is preferably formed directly on the top of the solar cell (S530).

Here, the OLED constituting the transparent OLED display comprises a transparent upper electrode and a transparent lower electrode, the material used to form the transparent electrode may vary according to the situation such as conductivity and transmittance, and the electrode of the solar cell described above Similarly, although the electrode of OLED can be formed by a single electrode, it can also be formed by the multilayer thin film electrode of a transparent insulating layer / transparent electrode / transparent insulating layer. Of course, when forming a multilayer thin film electrode, it is preferable to form in consideration of light transmittance.

In addition, in manufacturing the transparent OLED display of the present invention, a transparent intermediate layer may be formed using a transparent substrate, which will be described with reference to FIG. 7.

7 is a flowchart illustrating a method of manufacturing a transparent OLED display according to another embodiment of the present invention.

Referring to FIG. 7, the method of manufacturing a transparent OLED display forms a transparent OLED display including a transparent upper electrode and a transparent lower electrode on a first transparent substrate (S710).

In this case, the first transparent substrate on which the transparent OLED display is formed may be determined in consideration of the transmittance of light transmitted to the upper part of the solar cell, and the transparent upper electrode and the transparent lower electrode may be a single thin film electrode or a multilayer thin film electrode.

Similarly, a solar cell including a transparent electrode is formed on the second transparent substrate (S720).

At this time, both electrodes constituting the solar cell may be a transparent electrode, only one may be a transparent electrode, when only one electrode is a transparent electrode, the transparent electrode may be an electrode adjacent to the transparent OLED display, transparent electrode May be a single thin film electrode or a multilayer thin film electrode.

Of course, the second transparent substrate on which the solar cell is formed may also be determined in consideration of the transmittance of light transmitted to the solar cell.

Here, although steps S710 and S720 are shown to be sequentially performed, the order of the above steps may be reversed, or both steps may be performed simultaneously.

As described above, when the transparent OLED display is formed on the first transparent substrate, and the solar cell is formed on the second transparent substrate, the first transparent OLED display is formed such that the solar cell is formed directly below the transparent OLED display. The transparent substrate is bonded to the upper structure of the solar cell is formed (S730).

In this case, the bonding may include bonding the lower portion of the first transparent substrate to the upper portion of the solar cell, or bonding the lower portion of the first transparent substrate and the lower portion of the second transparent substrate, wherein the lower portion of the first transparent substrate is bonded to the upper portion of the solar cell. In this case, the electrode of the solar cell bonded to the first transparent substrate must be a transparent electrode. When the lower part of the first transparent substrate and the lower part of the second transparent substrate are bonded together, the electrode of the solar cell adjacent to the upper part of the second transparent substrate must be It must be a transparent electrode.

As described above, the method of manufacturing a transparent OLED display according to an exemplary embodiment of the present invention described with reference to FIGS. 5 to 7 adjusts the transmittance of light transmitted to a solar cell using a transparent intermediate layer, thereby increasing the contrast of the display device. In addition, the light loss can be minimized, and the amount of light transmitted to the solar cell can be maximized, thereby assisting the power of the display device to maximize the use time of the device.

In the method of manufacturing a transparent OLED display of the present invention, a transparent OLED display may be formed on a transparent substrate, and a solar cell may be formed below the transparent substrate, such that the transparent substrate itself may serve as a transparent intermediate layer.

Of course, in order for the transparent substrate to serve as a transparent intermediate layer, it is obvious that the light transmittance in the transparent substrate itself must be considered.

According to the present invention, a transparent organic light emitting diode display device having a solar cell and a method of manufacturing the same may be modified and applied in various forms within the scope of the technical idea of the present invention, and the present invention is not limited thereto. In addition, the embodiments and drawings are merely for the purpose of describing the contents of the invention in detail, and are not intended to limit the scope of the technical idea of the invention, the present invention described above is common in the art to which the present invention pertains. As those skilled in the art can make various substitutions, modifications, and changes without departing from the technical spirit of the present invention, it is not limited to the embodiments and the accompanying drawings. Judgment should be made including scope and equivalence.

1 is a cross-sectional view of a transparent organic light emitting diode display device according to an embodiment of the present invention.

FIG. 2 illustrates a cross-sectional view of an embodiment for describing the structure of the transparent intermediate layer illustrated in FIG. 1.

FIG. 3 is a cross-sectional view of another embodiment for explaining the structure of the transparent intermediate layer illustrated in FIG. 1.

4 is a cross-sectional view of another embodiment for explaining the structure of the transparent intermediate layer illustrated in FIG. 1.

5 is an operation flowchart of a method of manufacturing a transparent OLED display according to an embodiment of the present invention.

FIG. 6 is a flowchart illustrating an embodiment of operation S520 of FIG. 5.

7 is a flowchart illustrating a method of manufacturing a transparent OLED display according to another embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

110: transparent OLED display

120: transparent intermediate layer

130: solar cell

Claims (16)

A display unit including a transparent organic light emitting diode (OLED) display and a driving circuit; A solar cell formed directly below the transparent organic light emitting diode display and converting light into electricity to assist device power; And And a transmittance adjusting element formed between the transparent organic light emitting diode display and the solar cell to perform an insulation function, adjusting the transmittance of light reaching the upper portion of the solar cell, and electrically controlling the transmittance of the light. Transparent organic light emitting diode display device comprising a transparent intermediate layer. The method of claim 1, The transparent interlayer Transparent organic light emitting diode display device formed in a multi-layer structure. The method according to claim 1 or 2, The transparent interlayer A transparent organic light emitting diode display device in which a first transparent insulating layer and a second transparent insulating layer having different refractive indices are repeatedly formed a predetermined number of times. The method of claim 3, The first transparent insulating layer is A high refractive index material having a predetermined refractive index or higher, The second transparent insulating layer is A transparent organic light emitting diode display device comprising a low refractive index material of less than the predetermined refractive index. The method of claim 1, The electrode of the transparent OLED display and the electrode of the solar cell A transparent organic light emitting diode display device which is a multilayer thin film electrode of a transparent insulating layer / metal thin film layer / transparent insulating layer having a predetermined refractive index. delete The method of claim 1, The transmittance control element Among electrochromic materials including Viologen, Polyoxotungstates, NiO _x , TiO ₂ and WO ₃ , Polymer-dispersed iquid crystals (PDLC), reflective liquid crystals, transmissive liquid crystals and light-controlling films that can be switched between transparent and mirror states Transparent organic light emitting diode display device formed by any one. The method according to claim 1 or 2, The transparent organic light emitting diode display Upper and lower transparent formed of at least one of a metal oxide based electrode including ITO, a metal thin film electrode including Ag, Au, Cu, and CNT, a polymer electrode including PEDOT: PSS, and a multilayer thin film electrode composed of a dielectric-metal-dielectric Transparent organic light emitting diode display device comprising an electrode. The method according to claim 1 or 2, The solar cell A crystalline silicon solar cell, an amorphous silicon solar cell, a group 3-5 solar cell including GaAs, a CIGS (Cu, In, Ga, Se compound) solar cell, a fuel-sensitive solar cell, or an organic based solar cell. Transparent organic light emitting diode display device. Comprising a transparent upper electrode on the substrate, converting light into electricity to form a solar cell to assist the power of the device; Forming a transparent intermediate layer including a transmittance adjusting element capable of performing an insulation function on the upper surface of the solar cell, adjusting the transmittance of light reaching the upper part of the solar cell, and electrically controlling the transmittance of the light; And The transparent organic light emitting diode display manufacturing method comprising the step of forming a transparent organic light emitting diode display on the upper surface of the transparent intermediate layer directly on the solar cell. The method of claim 10 Forming the transparent intermediate layer A method of manufacturing a transparent organic light emitting diode display, wherein the transparent intermediate layer is formed by repeatedly forming a first transparent insulating layer and a second transparent insulating layer having different refractive indices a predetermined number of times. The method of claim 10 Forming the solar cell Forming the transparent upper electrode as a multilayer thin film electrode including a transparent insulating layer having a predetermined refractive index, Forming directly on the top of the solar cell A method of manufacturing a transparent organic light emitting diode display, wherein the transparent lower electrode of the transparent organic light emitting diode display is formed as a multilayer thin film electrode including a transparent insulating layer having a predetermined refractive index. The method of claim 10 Forming the transparent intermediate layer Electrochromic materials including Viologen, Polyoxotungstates, NiO _x , TiO ₂ and WO ₃ which can electrically control the light transmittance, Polymer-dispersed iquid crystals (PDLC), Reflective liquid crystal, Transparent liquid crystal and transparent state And forming a transparent intermediate layer by using a transmittance control element including any one of a light control film switchable to a mirror state. Forming a transparent organic light emitting diode display on the first transparent substrate; Forming a solar cell structure by including a transparent electrode on the second transparent substrate and converting light into electricity to form a solar cell to assist the power of the device; And Bonding the first transparent substrate to an upper portion of the solar cell structure such that the solar cell is formed directly below the transparent organic light emitting diode display. Transparent organic light emitting diode display manufacturing method comprising a. The method of claim 14, The step of bonding The transparent organic light emitting diode display manufacturing method of bonding the lower portion of the first transparent substrate to the upper portion of the solar cell. The method of claim 14, The step of bonding A method of manufacturing a transparent organic light emitting diode display, which bonds the lower portion of the first transparent substrate and the lower portion of the second transparent substrate.

Images