KR20190138942A - Transparent Display Device Including Liquid Crystal Capsule And Method Of Fabricating The Same - Google Patents

Abstract

The present invention provides a transparent display device which includes: a substrate including a display area including a plurality of pixels and a non-display area on one side of the display area; a thin film transistor disposed on each of the plurality of pixels on the substrate; a pixel electrode and a common electrode separated from each other and arranged on each of the plurality of pixels on the substrate; a liquid crystal layer disposed on the pixel electrode and the common electrode and including a liquid crystal capsule and a binder; a total reflection layer disposed on the liquid crystal layer; and a light source unit disposed in the non-display area on the substrate.

Description

Transparent Display Device Including Liquid Crystal Capsule And Method Of Fabricating The Same}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and in particular, by bonding an array substrate on which a thin film transistor is formed, an auxiliary adhesive layer and an optical film on which a liquid crystal layer is formed, to prevent bubble generation and to facilitate rework, It is about.

In recent years, as the society enters a full-scale information age, a display field for processing and displaying a large amount of information has been rapidly developed, and various various display devices have been developed and received much attention in response to this.

Specific examples of such display devices include liquid crystal display devices (LCDs), organic light emitting diode display devices (OLEDs), plasma display panels (PDPs), and field emission displays. A field emission display device (FED) can be cited, and these display devices are widely used with excellent performance of light weight, thinness, and low power consumption.

On the other hand, recently, researches on a transparent display device that allows a user to see an object or an image positioned on the opposite side through the display device have been actively conducted.

Such transparent display devices have advantages of space utilization, interior and design, and are being researched and developed to be used in a wider area, and are particularly easy to apply to augmented reality.

However, when the liquid crystal panel is applied to the transparent display device, there is a problem that the transparent display device has a relatively low transmittance by the color filter layer and the polarization layer.

When the organic light emitting diode panel is applied to the transparent display device, there is a problem in that the transparent display device does not have sufficient luminance for color display due to additional color mixing due to background light.

The present invention has been made to solve such a problem, and the transparent display device including the liquid crystal capsule which improves the transmittance and reduces the manufacturing cost by driving the liquid crystal layer including the liquid crystal capsule in a transmission state and scattering state, and its manufacture It is an object to provide a method.

In addition, the present invention provides a transparent display device including a liquid crystal capsule in which the liquid crystal layer including the liquid crystal capsule is driven in a transmission state and a scattering state of a field sequential color method, thereby improving transmittance and luminance and reducing manufacturing cost, and manufacturing the same. It is another object to provide a method.

In order to solve the above problems, the present invention provides a display device including a display area including a plurality of pixels and a non-display area on one side of the display area; A thin film transistor disposed on each of the plurality of pixels on the substrate; A pixel electrode and a common electrode disposed on each of the plurality of pixels on the substrate and spaced apart from each other; A liquid crystal layer disposed on the pixel electrode and the common electrode and including a liquid crystal capsule and a binder; A total reflection layer layer disposed on the liquid crystal layer; A transparent display device including a light source unit disposed in the non-display area on the substrate is provided.

The average refractive index of the liquid crystal capsule and the binder of the liquid crystal layer may be greater than the refractive index of the substrate and larger than the refractive index of the total reflection layer.

In addition, the average refractive index of the liquid crystal capsule and the binder of the liquid crystal layer is 1.55 to 1.65, the refractive index of the substrate is less than or equal to 1.5, the refractive index of the total reflection layer may be less than or equal to 1.5.

The first light incident on the liquid crystal layer from the rear surface of the substrate passes through the liquid crystal layer as it is, and the second light incident on the liquid crystal layer from the light source unit is an interface between the liquid crystal layer and the substrate and the liquid crystal. It may be total reflection at the interface of the layer and the total reflection layer.

In addition, the liquid crystal capsule includes a plurality of liquid crystal molecules, when the same voltage is applied to the pixel electrode and the common electrode, the plurality of liquid crystal molecules are randomly arranged, and the liquid crystal capsule of the binder When the refractive index has the same off refractive index and different voltages are applied to the pixel electrode and the common electrode, the plurality of liquid crystal molecules are arranged such that their major axis corresponds to an electric field generated between the pixel electrode and the common electrode. The liquid crystal capsule may have an on refractive index different from that of the binder.

When the same voltage is applied to the pixel electrode and the common electrode, the second light passes through the liquid crystal capsule and the binder as it is, and when the different voltage is applied to the pixel electrode and the common electrode, Two light may be scattered at an interface between the liquid crystal capsule and the binder to become third light, and the third light may be emitted through the substrate and the total reflection layer.

The light source unit may include first to third light sources that emit the second light corresponding to the first to third colors, respectively, and the second light corresponding to the first to third colors is sequentially emitted. Can be.

On the other hand, the present invention comprises the steps of forming a pixel electrode and a common electrode spaced apart from the thin film transistor in each of the plurality of pixels of the display area on the substrate; Forming a liquid crystal layer including a liquid crystal capsule and a binder on the pixel electrode and the common electrode; Forming a total reflection layer on the liquid crystal layer; A method of manufacturing a transparent display device includes disposing a light source unit in a non-display area on one side of the display area on the substrate.

The forming of the liquid crystal layer may include forming a liquid crystal capsule material layer by applying a liquid crystal capsule solution including the liquid crystal capsule and the binder to the display area on the pixel electrode and the common electrode; And heat treating the liquid crystal capsule material layer to form the liquid crystal layer.

The present invention has the effect of improving the transmittance and reducing the manufacturing cost by driving the liquid crystal layer containing the liquid crystal capsule in a transmission state and a scattering state.

In addition, the present invention, by driving the liquid crystal layer containing the liquid crystal capsule in the transmission state and the scattering state of the field sequential color system, has the effect of improving the transmittance and luminance and reduce the manufacturing cost.

1A and 1B are cross-sectional views illustrating a transmission mode and a scattering mode of a transparent display device including a liquid crystal capsule according to an exemplary embodiment of the present invention, respectively.
2 is a waveform diagram illustrating a method of driving a transparent display device according to an exemplary embodiment of the present invention.
3A to 3D illustrate a method of manufacturing a transparent display device according to an exemplary embodiment of the present invention.

Hereinafter, a liquid crystal display device including a liquid crystal capsule according to the present invention will be described with reference to the accompanying drawings.

1A and 1B are cross-sectional views illustrating a transmission mode and a scattering mode of a transparent display device including a liquid crystal capsule according to an exemplary embodiment of the present invention, respectively.

As shown in FIGS. 1A and 1B, a transparent display device 110 including a liquid crystal capsule according to an exemplary embodiment of the present invention may include a substrate 120 including a plurality of pixels P1 and P2, and a substrate ( 120 includes a liquid crystal layer 140 disposed above.

In detail, the substrate 120 includes first and second pixels P1 and P2 to display the display area DA used for displaying an image and the non-display area NDA at one edge of the display area DA. It may include, and may be made of glass or made of a flexible material such as plastic.

A gate electrode 122 is formed in each of the first and second pixels P1 and P2 of the display area DA on the substrate 120, and a gate insulating layer is formed in the display area DA on the gate electrode 122. 124 is formed.

The semiconductor layer 126 is formed on the gate insulating layer 124 corresponding to the gate electrode 122, and the source electrode 128 and the drain electrode 130 are formed on both ends of the semiconductor layer 126.

Here, the gate electrode 122, the semiconductor layer 126, the source electrode 128, and the drain electrode 130 constitute a thin film transistor T.

Although not shown, gate and data wirings defining the first and second pixels P1 and P2 are formed on the substrate 120 to cross each other, and the gate electrode 122 of the thin film transistor T is a gate wiring. The source electrode 128 of the thin film transistor T may be connected to the data line.

A protective layer 132 is formed in the display area DA on the thin film transistor T, and the protective layer 132 has a drain contact hole exposing the drain electrode 130 of the thin film transistor T.

The pixel electrode 134 and the common electrode 136 are formed in the first and second pixels P1 and P2 on the passivation layer 132, respectively, and the pixel electrode 134 is a drain contact hole of the passivation layer 132. It is connected to the drain electrode 130 of the thin film transistor T through the common electrode 136 is spaced apart from the pixel electrode 134.

Although not illustrated, the pixel electrode 134 and the common electrode 136 may have a bar shape and may be formed in plural numbers spaced apart from each other in parallel with each other in the first and second pixels P1 and P2.

In the embodiment of FIGS. 1A and 1B, the pixel electrode 134 and the common electrode 136 have a plurality of bar shapes of the same layer, but in another embodiment, the pixel electrode and the common electrode are formed by interposing an insulating layer. It can have multiple bar shapes of different layers.

In another embodiment, one of the pixel electrode and the common electrode is formed as a plate-shaped lower layer, and the other of the pixel electrode and the common electrode is formed of a plurality of bar shapes or a plurality of slits through an insulating layer. It may be formed of a plate-shaped upper layer having a.

The liquid crystal layer 140 is formed in the display area DA on the pixel electrode 134 and the common electrode 136.

The liquid crystal layer 140 includes a plurality of liquid crystal capsules 142 and a binder 144 in which a plurality of liquid crystal capsules 142 are dispersed. Each of the plurality of liquid crystal capsules 142 includes a plurality of liquid crystal molecules 146. It includes.

The thickness of the liquid crystal layer 140 may be changed according to the birefringence characteristics and the optical transmittance of the liquid crystal capsule 142. For example, the thickness of the liquid crystal layer 140 may be in a range of about 1 μm to about 6 μm.

The plurality of liquid crystal capsules 142 are polymer capsules each having a diameter of several to several hundred nanometers, and are water-soluble materials such as poly vinyl alcohol (PVA) or poly methyl methacrylate. Fat-soluble material, such as PMMA), and may have a diameter in the range of about 1 nm to about 320 nm, for example.

The binder 144 serves to disperse the plurality of liquid crystal capsules 142. For example, the binder 144 may be transparent or translucent, and may have a water-soluble, fat-soluble or water-soluble and fat-soluble mixed property.

The plurality of liquid crystal molecules 146 may be formed of at least one of a nematic liquid crystal, a ferroelectric liquid crystal, and a flexo electric liquid crystal.

The liquid crystal layer 140 including the plurality of liquid crystal capsules 142 and the binder 146 may be formed without a separate alignment layer. As a result, the liquid crystal layer 140 may be formed on the pixel electrode 134 and the common electrode 136. Can be contacted directly.

The total reflection layer 150 is formed in the display area DA on the liquid crystal layer 140. The total reflection layer 150 serves to protect the liquid crystal layer 140 and is inclined to the liquid crystal layer 140. It is a total reflection of light.

To this end, the total reflection layer 150 is made of a thin film of an organic insulating material having a refractive index smaller than the average refractive index of the liquid crystal capsule 142 and the binder 144 of the liquid crystal layer 140 or the liquid crystal capsule of the liquid crystal layer 140 ( 142 and the binder 144 may be made of a glass or plastic substrate having a refractive index smaller than the average refractive index.

The light source unit 160 is disposed on the non-display area NDA of the substrate 120, and the light source unit 160 emits first to third light sources 162, 164, and 166, respectively. ) May be included.

For example, the first to third colors may be red, green, blue, cyan, magenta, yellow, and first to third colors, respectively. The third light sources 162, 164, and 166 may be light emitting diodes (LEDs), respectively.

Light emitted from the light source unit 160 is incident to the side surface of the liquid crystal layer 140.

In the transparent display device 110, when the voltage is not applied between the pixel electrode 134 and the common electrode 136, the liquid crystal layer 140 receives light incident from the rear surface of the substrate 120. The liquid crystal layer 140 emits light incident from the side of the liquid crystal layer 140 in an on state in which a voltage is applied between the pixel electrode 134 and the common electrode 136. Scattering operates in scattering mode.

In the transmission mode and the scattering mode, the plurality of liquid crystal capsules 142 each have a nano size of a diameter of several to several hundred nanometers (nanometer), so that the first light L1 incident from the rear surface of the substrate 120 is a liquid crystal. Pass through layer 140 as it is.

Accordingly, a user located in front of the total reflection layer 150 of the transparent display device 110 may recognize an object on the rear surface of the substrate 120 of the transparent display device 110.

The average refractive index nave of the plurality of liquid crystal capsules 142 and the binder 144 of the liquid crystal layer 140 is greater than the refractive index n sub of the substrate 120 and larger than the refractive index n ref of the total reflection layer 150. It can be a value (nave> nsub, nave> nref).

For example, the average refractive index of the plurality of liquid crystal capsules 142 and the binder 144 of the liquid crystal layer 140 is about 1.55 to about 1.65, and the refractive index nsub of the substrate 120 is less than about 1.5. The refractive index nref of the total reflection layer 150 may be less than or equal to about 1.5.

Accordingly, the second light L2 that is incident obliquely from the light source unit 160 to the first side surface of the liquid crystal layer 140 has an interface between the liquid crystal layer 140 and the substrate 120, the liquid crystal layer 140, and the total reflection layer. Total reflection at the interface of 150 proceeds to the second side of the liquid crystal layer 140 positioned opposite to the first side of the liquid crystal layer 140.

Then, as shown in FIG. 1A representing the transmissive mode, no voltage is applied between the pixel electrode 134 and the common electrode 136 (the pixel electrode 134 and the common electrode 136 are floated, or In the off state in which the same voltage is applied to the pixel electrode 134 and the common electrode 136, an electric field is not generated between the pixel electrode 134 and the common electrode 136, and the liquid crystal capsule 142 is formed. The plurality of liquid crystal molecules 146 therein are randomly arranged.

In this case, the liquid crystal capsule 142 has an off refractive index noff, and the off refractive index noff of the liquid crystal capsule 142 may be substantially the same as the refractive index nbin of the binder 144 (noff to nbin).

Accordingly, the second light L2 incident obliquely from the light source unit 160 to the first side surface of the liquid crystal layer 140 passes through the liquid crystal layer 142 without being scattered at the interface between the liquid crystal capsule 142 and the binder 144. Proceeding to the second side of 140, the transparent display device 110 does not display an image.

That is, a user located on the front surface of the total reflection layer 150 of the transparent display device 110 may recognize an object located on the rear surface of the substrate 120 of the transparent display device 110.

In addition, as shown in FIG. 1B representing the scattering mode, a voltage is applied between the pixel electrode 134 and the common electrode 136 (a different voltage is applied to the pixel electrode 134 and the common electrode 136). In the on state, an electric field is generated between the pixel electrode 134 and the common electrode 136, and the plurality of liquid crystal molecules 146 inside the liquid crystal capsule 142 are arranged such that their major axes correspond to the electric field. The birefringence is induced in the capsule 142.

Here, the liquid crystal capsule 142 has a on refractive index (non), the on refractive index (non) of the liquid crystal capsule 142 may be different from the refractive index (nbin) of the binder 144 (noff ≠ nbin).

Accordingly, the second light L2 that is incident obliquely from the light source unit 160 to the first side surface of the liquid crystal layer 140 is scattered at the interface between the liquid crystal capsule 142 and the binder 144 and is totally reflected by the liquid crystal layer ( Proceeding to the second side of the screen 140, the transparent display device 110 displays an image.

In detail, in the on state of the transparent display device 110, different data voltages are applied to the pixel electrodes 134 of the plurality of pixels, and the pixel electrode 134 and the common electrode 136 of the plurality of pixels are applied. Different electric fields are generated therebetween, and the liquid crystal molecules 146 inside the liquid crystal capsule 142 are arranged to correspond to electric fields having different long axes, respectively, and different birefringence is induced in the liquid crystal capsule 142.

Accordingly, the second light L2 is scattered to a different degree at the interface between the liquid crystal capsule 142 and the binder 144 of the plurality of pixels, and is emitted to the rear surface of the substrate 120 or to the front surface of the total reflection layer 150. The third light L3 becomes a plurality of pixels, and each of the plurality of pixels displays a gray level corresponding to the data voltage, and the transparent display device 110 displays an image corresponding to the data voltage.

That is, a user located in front of the total reflection layer 150 of the transparent display device 110 displays an object displayed on the back surface of the substrate 120 of the transparent display device 110 and an image displayed by the transparent display device 110. It can be recognized at the same time.

As described above, in the transparent display device 110 according to the exemplary embodiment of the present invention, an additional polarization layer is formed by displaying an image using the liquid crystal layer 140 including the liquid crystal capsule 142 and the binder 144. Omitted and transmittance and brightness are improved.

Meanwhile, the transparent display device 110 according to an exemplary embodiment of the present invention is driven by a field sequential color method, which will be described with reference to the drawings.

2 is a waveform diagram illustrating a method of driving a transparent display device according to an exemplary embodiment of the present invention, which will be described with reference to FIGS. 1A and 1B.

As shown in FIG. 2, in the scattering mode of the transparent display device 110 according to the exemplary embodiment of the present invention, a data voltage is applied to the pixel electrode 134. The first and third data voltages DATA1, DATA2, and DATA3 corresponding to the first to third color components of the image are respectively the pixel electrodes 134 during the third to third subframes SF1, SF2, and SF3. Is applied.

For example, one frame F may be about 16.7 msec, and the first to third subframes SF1, SF2, and SF3 may each be about 5.6 msec.

The first to third light sources 162, 164, and 166 are turned on during the first to third subframes SF1, SF2, and SF3, respectively, to emit light of the first to third colors. Release.

Specifically, during the first subframe SF1, a data voltage corresponding to the first color is applied to the pixel electrodes 134 of the plurality of pixels, and the first light source 162 is turned on and the second and third pixels are turned on. When the light sources 164 and 166 are turned off, the light source unit 160 supplies the second color L2 of the first color to the liquid crystal layer 140, and the transparent display device 110 may include the first light source. Display the image of the color component.

During the second subframe SF2, a data voltage corresponding to the second color is applied to the pixel electrodes 134 of the plurality of pixels, the second light source 164 is turned on, and the third and first light sources 166 are turned on. , 162 is turned off so that the light source unit 160 supplies the second light L2 of the first color to the liquid crystal layer 140, and the transparent display device 110 displays an image of the second color component.

During the third subframe SF3, a data voltage corresponding to the third color is applied to the pixel electrodes 134 of the plurality of pixels, and the third light source 166 is turned on and the first and second light sources 162 are turned on. , 164 is turned off so that the light source unit 160 supplies the second color L2 of the third color to the liquid crystal layer 140, and the transparent display device 110 displays an image of the third color component.

Therefore, the transparent display device 110 displays the first to third color components of the image by time division, and the user recognizes the image by synthesizing the first to third color components.

As described above, in the transparent display device 110 according to the exemplary embodiment of the present invention, the image is displayed in a field sequential color manner by using the liquid crystal layer 140 including the liquid crystal capsule 142 and the binder 144. Separate polarizing layers and color filter layers are omitted and transmittance and luminance are further improved.

A method of manufacturing the transparent display device 110 will be described with reference to the drawings.

3A to 3D are views for explaining a method of manufacturing a transparent display device according to an exemplary embodiment of the present invention, which will be described with reference to FIGS. 1A and 1B.

As shown in FIG. 3A, the gate electrode 122, the semiconductor layer 126, the source electrode 128, and the drain electrode are respectively disposed in the plurality of pixels P1 and P2 of the display area DA on the substrate 120. A protective layer having a drain contact hole forming a thin film transistor T including the 130 and exposing the drain electrode 130 of the thin film transistor T to the display area DA on the thin film transistor T. 132).

The pixel electrode 134 and the common electrode 136 are formed in the plurality of pixels P1 and P2 on the passivation layer 132, respectively. The pixel electrode 134 is a drain of the passivation layer 132. It is connected to the drain electrode 130 of the thin film transistor T through the contact hole.

Substrate 120 may be made of glass or plastic having an index of refraction (nsub) less than or equal to about 1.5.

As shown in FIG. 3B, a liquid crystal capsule including a plurality of liquid crystal capsules 142 and a binder 144 through the nozzle 170 in the display area DA on the pixel electrode 134 and the common electrode 136. The liquid crystal capsule material layer 172 is formed by applying a solution, and the liquid crystal capsule material layer 172 is dried or cured (heat-treated) to form the liquid crystal layer 140.

The average refractive index nave of the liquid crystal layer 140 is greater than the refractive index nsub of the substrate 120 and may be about 1.55 to about 1.65.

The off refractive index noff of the liquid crystal capsule 142 is substantially the same as the refractive index nbin of the binder 144, and the on refractive index non of the liquid crystal capsule 142 is different from the refractive index nbin of the binder 144. Do.

As shown in FIG. 3C, the total reflection layer 150 is formed in the display area DA on the liquid crystal layer 140.

The average refractive index nave of the liquid crystal layer 140 is greater than the refractive index nref of the total reflection layer 150, and the total reflection layer 150 has an organic insulating material or an inorganic insulating material having a refractive index nref less than or equal to about 1.5. It may be made of.

As shown in FIG. 3D, the light source unit 160 is disposed in the non-display area NDA on the substrate 120.

The light source unit 160 includes first to third light sources 162, 164, and 166 that emit light of the first to third colors, respectively, and the first to third light sources 162, 164, and 166 may include a first light source. To light of the third color may be sequentially emitted.

As described above, in the transparent display device 110 according to the embodiment of the present invention, by forming the liquid crystal layer 140 including the liquid crystal capsule 142 and the binder 144 in a coating method, a liquid crystal dropping process and a bonding process Is omitted, the manufacturing process is simplified and manufacturing costs are reduced.

In the embodiment of FIGS. 1A and 1B, the user is positioned in front of the total reflection layer 150, but in another embodiment, the user is positioned on the rear surface of the substrate 120 and the object positioned in front of the total reflection layer 150. An image displayed by the transparent display device 110 may be simultaneously recognized.

1A and 1B, the pixel electrode 134 and the common electrode 136 are disposed between the substrate 120 and the liquid crystal layer 140, and the horizontal electric field is disposed between the pixel electrode 134 and the common electrode 136. Is generated and the plurality of liquid crystal capsules 142 of the liquid crystal layer 140 are driven by a horizontal electric field. In another embodiment, a pixel electrode is disposed between the substrate 120 and the liquid crystal layer 140 and is common. An electrode may be disposed on the liquid crystal layer 140, a vertical electric field is generated between the pixel electrode and the common electrode, and the plurality of liquid crystal capsules 142 of the liquid crystal layer 140 may be driven by the vertical electric field.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art various modifications and changes to the present invention without departing from the spirit and scope of the present invention described in the claims below I can understand that you can.

110: transparent display device 120: substrate
T: thin film transistor 134: pixel electrode
136: common electrode 140: liquid crystal layer
150: total reflection layer 160: light source

Claims (9)

A substrate including a display area including a plurality of pixels and a non-display area on one side of the display area;
A thin film transistor disposed on each of the plurality of pixels on the substrate;
A pixel electrode and a common electrode disposed on each of the plurality of pixels on the substrate and spaced apart from each other;
A liquid crystal layer disposed on the pixel electrode and the common electrode and including a liquid crystal capsule and a binder;
A total reflection layer layer disposed on the liquid crystal layer;
A light source unit disposed in the non-display area on the substrate
Transparent display device comprising a.
The method of claim 1,
The average refractive index of the liquid crystal capsule and the binder of the liquid crystal layer is greater than the refractive index of the substrate, the transparent display device larger than the refractive index of the total reflection layer.
The method of claim 2,
The average refractive index of the liquid crystal capsule and the binder of the liquid crystal layer is 1.55 to 1.65,
The refractive index of the substrate is less than or equal to 1.5,
And a refractive index of the total reflection layer is less than or equal to 1.5.
The method of claim 2,
The first light incident on the liquid crystal layer from the rear surface of the substrate passes through the liquid crystal layer as it is,
And a second light incident from the light source unit to the liquid crystal layer is totally reflected at an interface between the liquid crystal layer and the substrate and at an interface between the liquid crystal layer and the total reflection layer.
The method of claim 1,
The liquid crystal capsule includes a plurality of liquid crystal molecules,
When the same voltage is applied to the pixel electrode and the common electrode, the plurality of liquid crystal molecules are randomly arranged, and the liquid crystal capsule has an off refractive index equal to the refractive index of the binder,
When different voltages are applied to the pixel electrode and the common electrode, the plurality of liquid crystal molecules are arranged such that a long axis corresponds to an electric field generated between the pixel electrode and the common electrode, and the liquid crystal capsule is formed by the refractive index of the binder. Transparent display device having different on refractive index.
The method of claim 5,
When the same voltage is applied to the pixel electrode and the common electrode, the second light passes through the liquid crystal capsule and the binder as it is,
When different voltages are applied to the pixel electrode and the common electrode, the second light is scattered at an interface between the liquid crystal capsule and the binder to become third light, and the third light is passed through the substrate and the total reflection layer. Emissive transparent display device.
The method of claim 1,
The light source unit includes first to third light sources that emit the second light corresponding to the first to third colors, respectively.
And the second light corresponding to the first to third colors is sequentially emitted.
Forming a pixel electrode and a common electrode spaced apart from the thin film transistor on each of a plurality of pixels in the display area on the substrate;
Forming a liquid crystal layer including a liquid crystal capsule and a binder on the pixel electrode and the common electrode;
Forming a total reflection layer on the liquid crystal layer;
Disposing a light source unit on a non-display area on one side of the display area on the substrate;
Method of manufacturing a transparent display device comprising a.
The method of claim 8,
Forming the liquid crystal layer,
Forming a liquid crystal capsule material layer by applying a liquid crystal capsule solution including the liquid crystal capsule and the binder to the display area on the pixel electrode and the common electrode;
Heat-treating the liquid crystal capsule material layer to form the liquid crystal layer
Method of manufacturing a transparent display device comprising a.

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