KR101258592B1 - flexible Liquid Crystal Display device and manufacturing method the same - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible liquid crystal display device having a built-in light source by an organic light emitting phenomenon and using a flexible metal foil substrate, and a method of manufacturing the same.

Specifically, the present invention is a metal foil material of the first substrate; An organic light emitting diode layer provided on one surface of the first substrate; A second substrate spaced apart from one surface of the first substrate; A liquid crystal layer interposed between the first and second substrates; Provided are a flexible liquid crystal display device including an array element layer driving the liquid crystal layer on the organic light emitting device layer and a method of manufacturing the same.

As a result, the present invention has the advantage of providing a flexible liquid crystal display device having flexibility by using a metal foil substrate because a separate backlight is not necessary because a light source by organic electroluminescence is incorporated.

Description

Flexible liquid crystal display device and manufacturing method the same

1 is an exploded perspective view of a general liquid crystal display device.

2 is a band diagram of an organic light emitting display device.

3 is a cross-sectional view of a flexible liquid crystal display device according to the present invention.

4A to 4F are cross-sectional views of a flexible liquid crystal display device according to the present invention.

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

110, 170: first and second substrate 120: organic light emitting element layer

132: barrier film 140: array element layer

180: color filter layer 190: liquid crystal layer

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device (LCD), and more particularly, a flexible metal foil substrate having a built-in light source by organic electroluminescence and a flexible metal foil substrate. A liquid crystal display device and a method of manufacturing the same.

In line with the recent information age, the display field for displaying electrical signal data has been rapidly developed. In response, the flat panel display having the advantages of small size, light weight and low power consumption has been developed. As a display device (FPD), a liquid crystal display device (LCD), an electroluminescence display device (ELD), a plasma display panel device (PDP), and the like have been developed. It is rapidly replacing (Cathode Ray Tube: CRT).

Among them, liquid crystal display devices, which are used to display moving images and have a large contrast ratio, are used most actively in TVs and monitors, and have an image realization principle due to optical anisotropy and polarization of liquid crystals. As a result, a liquid crystal panel having a liquid crystal layer interposed between two parallel substrates is an essential component, and a difference in transmittance is realized by changing an arrangement direction of liquid crystal molecules by an electric field in the liquid crystal panel. However, since the liquid crystal panel does not have a self-luminous element, a separate dimming means is required to project the difference in transmittance to the outside, and for this purpose, a cold cathode fluorescent lamp (CCFL) or A back light assembly using external electrode fluorescent lamps (EEFL) as a light source is provided.

1 is an exploded schematic view of a general liquid crystal display, and a portion of the liquid crystal panel 10 and a backlight 50 are shown.

The general liquid crystal panel 10 includes first and second substrates 12 and 22 made of glass or quartz, which are bonded to each other with the liquid crystal layer 30 interposed therebetween.

A plurality of gate lines 14 and data lines 16 are arranged crosswise on an inner surface of the first substrate 12 called a dual array substrate, thereby defining a matrix pixel P. Thin film transistors T (Thin Film Transistors (TFTs)) are provided at the intersections thereof and are connected in one-to-one correspondence with the pixel electrodes 18 mounted in the respective pixels P. The second substrate 22, also called a color-filter substrate, also covers non-display elements such as the thin film transistor T including the gate line 14 and the data line 16, and each pixel electrode. (18) a lattice-like black matrix (24) exposing only (18), a filled color filter 26 filled in each lattice thereof, and a common electrode covering these black matrices (24) and color filters (26). 28) is prepared.

The gate line 14 scans a gate signal on / off the thin film transistor T, and the data line 16 supplies a data signal as an actual liquid crystal driving voltage. When the thin film transistor T selected for each gate line 14 is turned on by the gate signal, the data signal is transferred to the pixel electrode 18 of the corresponding pixel P, which is common to the pixel electrode 18. The direction of arrangement of the liquid crystal molecules is changed by the electric field between the electrodes 28 to show the transmittance difference. At the same time, the backlight 50 supplies white light to the liquid crystal panel 10. As a result, the liquid crystal display device reflects the difference in transmittance and the color sum of the color filter 26 according to the arrangement state of the liquid crystal molecules for each pixel P. An image can be displayed.

However, since the liquid crystal panel 10 of the general liquid crystal display device described above has a large light loss due to the transmittance of less than 70%, the backlight 50 has a disadvantage in terms of power consumption because it has to emit high luminance light. In addition, in recent years, the display device is rapidly increasing in size and slim in response to user demand. However, in the case of the liquid crystal display device, the backlight 50, which is required separately from the liquid crystal panel 10, exhibits a limitation in thickness reduction. .

Meanwhile, as the use of display devices has been rapidly expanded, efforts have been made to implement a new concept display device, a so-called e-paper, which can be rolled or folded like a paper, and electrophoretic ink (e) -ink) is the field of electrophoretic display. However, the task of 'flexibility', which has no loss in display characteristics even when bent or bent, has been commonly introduced in various flat panel display devices. Accordingly, existing substrates with high hardness such as quartz or glass can be replaced with flexible plastic or metal foil. The flexible flat panel display device, which started with the replacement of a substrate, has already been known to have significant effectiveness in electroluminescent display devices and plasma display devices.

However, in the case of a liquid crystal display device, a plastic or metal foil substrate is difficult to be used, which can be found in that it is a non-light emitting display device that does not have its own light emitting element and characteristics in the manufacturing process of the liquid crystal display device.

That is, a general liquid crystal display manufacturing process involves several times of thermal and chemical processing on a substrate, making it difficult to use a plastic substrate vulnerable to heat and chemicals. Metal foil substrates that block light in the light transmitting liquid crystal panel used are difficult to apply.

As a result, the flexible liquid crystal display device using the metal foil substrate is currently applied only to the reflection type liquid crystal display device that does not need the back light, and shows a disadvantage in that the application range is greatly limited.

Accordingly, an object of the present invention is to provide a flexible liquid crystal display device using a flexible plastic or metal foil substrate and a method of manufacturing the same. In particular, the present invention is to disclose a flexible liquid crystal display device having a transmissive structure in addition to the reflective type, in particular, by providing a self-luminous type liquid crystal display device with a light source mounted in the liquid crystal panel is excellent in terms of brightness and power consumption, separate backlight The purpose of the present invention is to realize a flexible liquid crystal display device that can be slimmed down.

In order to achieve the above object, the present invention, the first substrate of the metal foil material; An organic light emitting diode layer provided on one surface of the first substrate; A second substrate spaced apart from one surface of the first substrate; A liquid crystal layer interposed between the first and second substrates; Provided is a flexible liquid crystal display device including an array element layer driving the liquid crystal layer on the organic light emitting device layer. In this case, the first substrate is non-transmissive, the second substrate is characterized in that the transmission, the second substrate is characterized in that the plastic material.

In addition, the organic light emitting device layer is an organic light emitting film, which is sequentially stacked from the first substrate; And a transparent first electrode film, wherein the buffer film is provided on an inner surface of the first substrate; And a second electrode film interposed between the buffer film and the organic light emitting film, the hole transport film interposed between the first electrode film and the organic light emitting film and between the organic light emitting film and the second electrode, respectively. It is characterized in that it further comprises an electron transport film.

The method may further include an insulating transparent barrier film interposed between the organic light emitting device layer and the array device layer, wherein the array device layer includes a gate defining a plurality of pixels by crossing each other on the barrier film; A data line; A thin film transistor provided at an intersection point of the gate and the data line; A pixel electrode connected to the thin film transistor in a one-to-one correspondence and mounted on each pixel; And a common electrode opposed to the pixel electrode, wherein the common electrode is formed on an inner surface of the second substrate, or the pixel electrode is arranged in a stripe shape in the pixel of the first substrate, The electrodes may be arranged in the form of stripes intersected with the pixel electrodes in the pixels of the first substrate.

And a color filter layer provided between the first and second substrates on the organic light emitting device layer.

In addition, the present invention comprises the steps of: a) preparing a first substrate of a metal foil material to form an organic light emitting device layer on one surface; b) forming an array device layer on the organic light emitting device layer; c) disposing a second substrate spaced apart from one surface of the first substrate, and interposing a liquid crystal layer between the first and second substrates.

The method may further include forming a barrier film of a transparent insulating material between the organic light emitting device layer and the array device layer, wherein the step a) includes an organic light emitting film and a transparent surface on one surface of the first substrate. And sequentially forming a first electrode film, and in particular, the step a) includes interposing a buffer film between one surface of the first substrate and the organic light emitting film and between the buffer film and the organic light emitting film. The method may further include a step of interposing a second electrode film, wherein the step a) includes a hole transport film and an electron transport between the first electrode film and the organic light emitting film and between the organic light emitting film and the second electrode film, respectively. It may further comprise intervening the membrane.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

Looking at the definition of some terms to be mentioned in the present specification before the full description, the flexible liquid crystal display device (hereinafter referred to as a liquid crystal display device) according to the present invention is a light source by the organic light emitting phenomenon in the flexible liquid crystal panel The liquid crystal display device and the liquid crystal panel have substantially the same meaning because the backlight is omitted. In addition, in the following description, the term "layer" refers to a laminate in which components in a thin film form are stacked for a predetermined function, and the thin film components forming each of them are differently referred to as a "film." . In addition, electroluminescence phenomenon refers to a luminescence phenomenon that occurs when an exciton transitioned from an excited state to a ground state by the combination of an electron and a hole, and an organic luminescence phenomenon is an organic phosphor. It means the case made within.

For reference, FIG. 2 is a band diagram of an organic light emitting display device having a light emission principle due to an organic light emitting phenomenon, and includes a hole transport film 54 and an electron transport film 64 facing each other. Each of the anode electrode film 52 and the cathode electrode film 62 formed therebetween and the organic emission film 70 interposed between the hole transport film 54 and the electron transport film 64. ). When positive and negative voltages are applied to the anode electrode film 52 and the cathode electrode film 62, the holes of the hole transport film 54 and the electrons of the electron transport film 64 are transported to the organic light emitting film 70. When the excitons form excitons, and the excitons transition from the excited state to the ground state, light is generated and emitted in the form of visible light by the organic light emitting film 70.

Accordingly, the present invention is a flexible liquid crystal display device (hereinafter, simply referred to as a liquid crystal display device) that exhibits flexibility by using a metal foil substrate while indicating a self-emission method in which a light source by the organic electroluminescence phenomenon is incorporated and unnecessary a separate backlight. 3 is a cross-sectional view of the liquid crystal display device according to the present invention.

As can be seen, the liquid crystal display according to the present invention is an organic light emitting display device 120 emitting light in the first and second substrates 110 and 170 bonded to each other with the liquid crystal layer 190 interposed therebetween, and an array element for driving the liquid crystal. The layer 140 and the color filter layer 180 for color realization are interposed. For example, the first substrate 110 has an inner surface of the first substrate 110 as well as the organic light emitting device layer 120 and a thin film transistor as the array element layer 140. The T and pixel electrodes 158 may be provided, and a color filter layer 180 and a common electrode 188 below the color filter layer 180 may be provided on an inner surface of the second substrate 170.

In addition, the first substrate 110 is made of a flexible non-transparent metal foil, and the second substrate 170 may be made of glass, quartz, or the like as a transparent insulating material, but preferably made of plastic material More advantageous than

Look at each one in more detail.

First, the organic light emitting device layer 120 and the array device layer 140 are sequentially disposed on an inner surface of the first substrate 110 made of a non-transmissive metal foil, and therebetween, a transparent barrier film 132 for insulation. Is interposed.

In this case, the organic light emitting diode layer 120 is a cathode electrode first electrode film 122, the electron transport film 124, the organic light emitting film 126, the hole transport film 128, in order from the first substrate 110, The second electrode film 130 as the anode electrode may be stacked. The first electrode film 122 is made of a metal material such as aluminum (Al), magnesium (Mg), lithium (Li), or an alloy containing at least one thereof, having a low opacity of work function, and the second electrode. The film 130 is made of a transparent conductive material such as indium-tin-oxide (ITO) or indium-zink-oxide (IZO) having a high work function. The first electrode film 122 may be replaced with the first substrate 110 made of a conductive metal foil. Alternatively, if the first electrode film 122 is provided separately, the first substrate 110 and the first electrode may be replaced. A buffer film for insulation may be interposed between the films 122. On the other hand, although not shown in the drawings, the organic light emitting diode layer 120 is the second electrode film 130, the hole transport film 128, the organic light emitting film 126, electrons that are anodes from the first substrate 110 The transport film 124 and the first electrode film 122 as the cathode electrode may be stacked in this order. In this case, the second electrode film 130 may be replaced with the first substrate 110 made of metal foil. An opaque metal having a high work function may be used, and the first electrode film 122 may be made of a transparent conductive material.

Therefore, when positive and positive voltages are supplied to the first and second electrode films 122 and 130, excitons due to the electrons of the electron transport film 124 and the holes of the hole transport film 128 are generated in the organic light emitting film 126. Transitioning from the excited state to the ground state indicates a so-called upper light emitting structure that emits light toward the second electrode film 130, that is, toward the second substrate 170. Preferably, the first electrode film is used to increase luminous efficiency. An electron injection layer may be interposed between the 122 and the electron transport layer 124, and a hole injection layer may be interposed between the hole transport layer 128 and the second electrode layer 130. Can be.

The transparent barrier layer 132, such as an organic or inorganic material or plastic, for insulation is disposed on the organic light emitting device layer 120, more precisely, on the second electrode layer 130.

Next, the array element layer 140 for driving the liquid crystal is positioned on the barrier layer 132, and the gate line facing one direction (see FIG. 1 in FIG. 1) is identical to the barrier layer 132. A gate electrode 142 branched from the gate electrode 142 is disposed, and an upper surface of the gate electrode 142 is covered, and an island-like semiconductor layer overlapping the gate electrode 142 is disposed on the gate insulating layer 144. 146 is located. In addition, a data line (see 16 of FIG. 1, hereinafter, the same as that of FIG. 1) and a gate line are formed on the semiconductor insulating layer 146 on the gate insulating layer 144 to intersect with the gate line to define the pixel P in a matrix form. A source electrode 150 overlapping the electrode 142 to a certain degree is positioned, and a drain electrode overlapping the gate electrode 142 to a certain degree on the semiconductor layer 146 at a predetermined distance from the source electrode 150. 152 is located. The passivation layer 156 covers the data lines and upper surfaces of the source and drain electrodes 150 and 152. The passivation layer 156 provides a contact hole H exposing a part of the drain electrode 152. On the upper surface of the passivation layer 156, a pixel electrode 158 connected to the drain electrode 152 through the contact hole H is positioned in each pixel P.

Accordingly, the gate electrode 142 and the semiconductor layer 146, the source and drain electrodes 150 and 152 form a thin film transistor T, and the exposed semiconductor layer 146 between the source and drain electrodes 150 and 152 is a channel (ch). Becomes

In addition, instead of covering the non-display elements such as the gate line, the data line, and the thin film transistor T as the color filter layer 180 on the inner surface of the second substrate 170, only the pixel electrodes 158 are exposed to prevent light leakage and leakage current. A black matrix 182 having a lattice shape is prevented, and a color filter 184 corresponding to each pixel is filled in each lattice thereof, and the liquid crystal layer 190 is interposed therebetween, covering all of them. The common electrode 188 facing the pixel electrode 158 is provided. In this case, the color filter 184 may form, for example, a repetitive arrangement of R (Red) and G (Green) B (Blue) color filters, which correspond one-to-one to each pixel P, and include a black matrix 182 and a color filter ( The planarization layer 186 for planarization may be interposed between the 184 and the common electrode 188.

Although not shown in the drawings, the first and second alignment layers for determining the initial alignment direction of the liquid crystal may be interposed between the liquid crystal layer 190 and the first and second substrates 110 and 170, and the second substrate 170 may be interposed between the liquid crystal layer 190 and the first and second substrates 110 and 170. The outer surface may be a polarizing plate for controlling the polarization state of light.

In the liquid crystal display device according to the present invention as described above, a predetermined voltage for organic electroluminescence is supplied to the first and second electrode layers 122 and 130 of the organic light emitting diode layer 120, and the gate line and the data line are gated. Signals and data signals are transmitted respectively to display color images.

That is, when a voltage having a predetermined magnitude is applied to the first and second electrode layers 122 and 130 of the organic light emitting diode layer 120, the visible light generated by the organic light emitting phenomenon is generated toward the second substrate 170. At the same time, when the thin film transistor T selected for each gate line is turned on by the gate signal, the data signal is supplied to the pixel electrode 158 of the pixel P. As a result, the pixel electrode 158 and The arrangement direction of the liquid crystal molecules is changed by the electric field between the common electrodes 188, indicating a transmittance difference. The difference in transmittance is determined by the color combination of the color filter 184 due to the light generated from the organic light emitting diode layer 120. Displayed in the form of the reflected color image.

Hereinafter, a manufacturing process of the liquid crystal display according to the present invention will be described with reference to FIGS. 3 and 4A through 4F, which are process cross-sectional views.

First, as shown in Figure 4a to prepare a first substrate 110 of a flexible metal foil.

Next, an inner surface of the first substrate 110 includes a first electrode film 122 serving as a cathode electrode, an electron transport film 124, an organic light emitting film 126, a hole transport film 128, and an anode electrode. The second electrode film 130 is sequentially stacked to complete the organic light emitting device layer 120. In this case, the first electrode film 122 may be made of aluminum, magnesium, lithium, or at least one alloy thereof, and the second electrode 130 film may be made of ITO or IZO, and the first electrode film 122 may be formed of electrons. An electron injection film and a hole injection film may be interposed between the transport film 124, the hole transport film 128, and the second electrode film 130, respectively.

In this case, in particular, the first electrode layer 122 may be replaced with the conductive first substrate 110, and provided separately from the first substrate 110, the first substrate 110 and the first substrate 110. A buffer film for insulation may be interposed between the electrode films 122. In addition, although the organic light emitting device layer 120 may be formed over the entire surface of the first substrate 110 as shown in the drawing, the organic light emitting device layer 120 may have a single shape corresponding to each pixel P.

Next, as illustrated in FIG. 4B, a barrier insulating layer 132 is formed by depositing a transparent insulating material on the second electrode layer 130 of the organic light emitting diode layer 120. At this time, if the barrier film 132 is also a transparent insulating material, there is no limitation on the type, plastic is also possible as an example.

Next, as shown in FIG. 4C, a first metal thin film made of aluminum (Al), molybdenum (Mo), tungsten (W), chromium (Cr), or at least one metal alloy material thereof is deposited on the barrier layer 132. Subsequently, patterning is performed to form a gate line and a gate electrode 142 branched therefrom.

Next, as shown in FIG. 4D, a gay insulating layer 144 is formed over the entire upper surface of the gate line and the gate electrode 142, which is selected from a group of organic insulating materials including silicon nitride (SiNx) and silicon oxide (SiOx). It may be made of a material. Subsequently, a pure amorphous silicon film is formed on the gate insulating film 144, and the surface is doped with impurities, followed by patterning to form an active film 147 of pure amorphous silicon and a shallow impurity amorphous silicon film doped with impurities. Subsequently, a second metal such as molybdenum or chromium is deposited and patterned to form data lines and source and drain electrodes 150 and 152, and the shallow impurity amorphous silicon film exposed between the source and drain electrodes 150 and 152 is removed to form a channel (ch). Implement Thereby, the semiconductor layer 146 which consists of the active film 147 and the ohmic contact film 148 is completed.

Next, as shown in FIG. 4E, a protective film 156 made of a material selected from a group of transparent organic insulating materials including benzocyclobutene (BCB) and an acrylic resin is deposited over the entire surface of the first substrate 110. The contact hole H exposing a part of the drain electrode 152 is formed.

Subsequently, as shown in FIG. 4F, one of ITO and IZO is deposited on the passivation layer 156, and then patterned to form a pixel electrode 158 connected to the drain electrode 152 through the contact hole H, thereby forming a first electrode. On the substrate 110, the organic light emitting diode layer 120 insulated by the barrier film 132 and the array device layer 140 except for the common electrode are sequentially completed.

Subsequently, the second substrate 170 on which the black matrix 182, the color filter 184, the common electrode 188, and the like are faced to each other is disposed through a separate manufacturing process, and then the liquid crystal layer 190 is interposed therebetween. A liquid crystal display device as shown in 3 can be completed.

Meanwhile, in the liquid crystal display device according to the present invention described above, the array element layer 140, the liquid crystal layer 190, and the color provided between the barrier layer 132 and the second substrate 170 of the first substrate 110. The filter layer 180 may have substantially the same configuration as a general liquid crystal panel.

Therefore, the foregoing description is only an aspect of the present invention, and in addition, the foregoing description is applicable to all kinds of liquid crystal display apparatuses using a separate backlight, such as a reflection transmission type or a transverse electric field method. That is, the core technical idea of the present invention is composed of first and second substrates 110 and 170 bonded to each other with the liquid crystal layer 190 interposed therebetween, and for driving the liquid crystal between the first and second substrates 110 and 170. In all kinds of liquid crystal displays provided with the array element layer 140 and the color filter layer 180 for color implementation, the first substrate 110 is made of a non-transmissive metal foil material and the first substrate 110 is formed. The present invention provides a flexible liquid crystal display device in which a backlight is omitted through an organic light emitting device layer 120 capable of emitting light on an inner surface thereof.

As a result, assuming the case of the reflective transmission type, the pixel electrode 158 in the array element layer 140 provided above the barrier layer 132 covering the organic light emitting element layer 120 on the inner surface of the first substrate 110. A part of the aperture is opened to form a reflecting part, and a separate reflecting electrode made of a metal material having high reflecting efficiency may be located in the reflecting part, and a part corresponding to the pixel electrode 158 is an organic light emitting diode layer 120. The visible light may be used to form a transmissive portion for displaying an image, and the portion corresponding to the reflective electrode may form a reflective portion for displaying an image using external natural light or the like. For example, in the case of the transverse electric field method, in the array device layer 140 provided on the barrier film 132 covering the organic light emitting device layer 120 on the inner surface of the first substrate 110, the pixel electrode ( The 158 and the common electrode 188 may take the form of staggered stripes in each pixel P on the same first substrate 110 and drive a liquid crystal with a transverse electric field therebetween. Although not shown in the drawings, it will be readily understood by those skilled in the art when referring to the above description.

The liquid crystal display device according to the present invention has a built-in light source due to the organic electroluminescence phenomenon is unnecessary a separate backlight, and provides a flexible liquid crystal display device having flexibility by using a metal foil substrate.

In this case, in particular, the present invention uses a metal foil material having excellent heat resistance and chemical resistance as the first substrate, so that the present invention can be applied to a conventional liquid crystal display manufacturing process without difficulty. There is an effect to achieve.

Claims (16)

A first substrate of metal foil material; An organic light emitting diode layer provided on one surface of the first substrate; A second substrate spaced apart from one surface of the first substrate; A liquid crystal layer interposed between the first and second substrates; Array device layer for driving the liquid crystal layer on the organic light emitting device layer / RTI &gt; The organic light emitting device layer includes an organic light emitting film and a first electrode film, which are sequentially stacked from the first substrate, wherein the first substrate applies a positive voltage to the organic light emitting device layer, and The first electrode film is a flexible liquid crystal display device applying a negative voltage to the organic light emitting device layer. The method of claim 1, The first substrate is impermeable, and the second substrate is transparent. The method of claim 1, The second substrate is a flexible liquid crystal display device made of plastic. A first substrate of metal foil material; An organic light emitting diode layer provided on one surface of the first substrate; A second substrate spaced apart from one surface of the first substrate; A liquid crystal layer interposed between the first and second substrates; Array device layer for driving the liquid crystal layer on the organic light emitting device layer / RTI &gt; A buffer film is interposed between the first substrate and the organic light emitting device layer, and the organic light emitting device layer is a flexible material including a first electrode film, an organic light emitting film, and a second electrode film, which are sequentially stacked from the buffer film. LCD display device. 5. The method of claim 4, And a hole transporting film and an electron transporting film interposed between the first electrode film, the organic light emitting film, and the organic light emitting film and the second electrode film, respectively. The method of claim 1, A hole transporting film and an electron transporting film interposed between the first electrode film and the organic light emitting film and between the organic light emitting film and the first substrate, respectively Flexible liquid crystal display device further comprising. The method of claim 1, An insulating transparent barrier film interposed between the organic light emitting device layer and the array device layer. Flexible liquid crystal display device further comprising. 8. The method of claim 7, The array device layer, A gate and a data line crossing each other on the barrier layer to define a plurality of pixels; A thin film transistor provided at an intersection point of the gate and the data line; A pixel electrode connected to the thin film transistor in a one-to-one correspondence and mounted on each pixel; A common electrode facing the pixel electrode Flexible liquid crystal display device comprising a. Claim 9 has been abandoned due to the setting registration fee. 9. The method of claim 8, The common electrode is formed on the inner surface of the second substrate. Claim 10 has been abandoned due to the setting registration fee. 9. The method of claim 8, The method of claim 1, And a color filter layer disposed between the first and second substrates on the organic light emitting device layer. a) preparing a first substrate of a metal foil material and forming an organic light emitting diode layer on one surface thereof; b) forming an array device layer on the organic light emitting device layer; c) disposing a second substrate spaced apart from one surface of the first substrate, and interposing a liquid crystal layer between the first and second substrates; Wherein the step a) includes sequentially forming an organic light emitting film and a first electrode film on the first substrate, wherein the first substrate generates a positive voltage to the organic light emitting film. And applying a negative voltage to the organic light emitting diode layer. 13. The method of claim 12, Forming a barrier film of a transparent insulating material between the organic light emitting device layer and the array device layer Flexible liquid crystal display device manufacturing method further comprising. a) preparing a first substrate of a metal foil material and forming an organic light emitting display device layer with a buffer film on one surface; b) forming an array device layer on the organic light emitting device layer; c) disposing a second substrate spaced apart from one surface of the first substrate, and interposing a liquid crystal layer between the first and second substrates; Wherein the step a) includes sequentially forming a first electrode film, an organic light emitting film, and a second electrode film on the buffer film. 15. The method of claim 14, The step a) includes interposing a hole transport film and an electron transport film between the first electrode film and the organic light emitting film and between the organic light emitting film and the second electrode film, respectively. Flexible liquid crystal display device manufacturing method further comprising. 13. The method of claim 12, Step a) includes interposing a hole transport film and an electron transport film between the first electrode film, the organic light emitting film, and the organic light emitting film and the first substrate, respectively. Flexible liquid crystal display device manufacturing method further comprising.

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