Transparent display device and method of manufacturing the same

1. A transparent display device comprising:

a first substrate including a pixel region and a light amount controlling region positioned so as to be in parallel to the pixel region;

an organic light emitting display positioned in the pixel region on the first substrate and including an anode electrode, a pixel defined layer covering an edge of the anode electrode and including an opening part extending to a portion of the anode electrode, an organic light emitting layer positioned on the anode electrode and in the opening part, and a cathode electrode positioned on the organic light emitting layer;

a liquid crystal display positioned in the light amount controlling region on the first substrate and including a pixel electrode, a roof layer facing the pixel electrode, and a liquid crystal layer having a plurality of microcavities partitioned from each other between the pixel electrode and the roof layer, wherein the microcavities comprise liquid crystal molecules; and

a second substrate sealing the organic light emitting display and the liquid crystal display.

2. The transparent display device of claim 1 , wherein:

the anode electrode includes a first layer comprising a transparent conductive material, a second layer comprising a metal material, and a third layer comprising the transparent conductive material, and

the pixel electrode comprises the same material as the first layer or the third layer.

3. The transparent display device of claim 2 , wherein:

the first layer and the third layer comprise indium-tin-oxide (ITO) or indium-zinc-oxide (IZO), and

the second layer comprises any one of silver (Ag), aluminum (Al), magnesium (Mg), lithium (Li), calcium (Ca), aluminum-lithium (Al—Li), magnesium-indium (Mg—In), magnesium-silver (Mg—Ag), and aluminum-silver (Al—Ag).

4. The transparent display device of claim 1 , wherein:

the pixel region includes a first pixel, a second pixel, and a third pixel, and

the first pixel, the second pixel, and the third pixel are arranged in a first row while being repeated, and the light amount controlling regions are arranged in a second row while being repeated.

5. The transparent display device of claim 4 , further comprising:

a first valley between the pixel region and the light amount controlling region.

6. The transparent display device of claim 5 , further comprising:

a liquid crystal injection hole extending to a portion of a microcavity of the microcavities.

7. The transparent display device of claim 6 , wherein:

the liquid crystal injection hole is positioned in one side surface of the microcavity facing the pixel region.

8. The transparent display device of claim 7 , further comprising:

an overcoat positioned on the roof layer and covering the liquid crystal injection hole.

9. The transparent display device of claim 1 , wherein:

the liquid crystal display is configured to adjust an amount of light incident from the outside.

10. The transparent display device of claim 1 , wherein:

the liquid crystal display is configured to be driven in a vertical electric field mode.

11. The transparent display device of claim 1 , further comprising:

a first polarizing plate attached to a lower surface of the first substrate; and

a second polarizing plate attached to an upper surface of the second substrate.

12. The transparent display device of claim 11 , wherein:

the first polarizing plate and the second polarizing plate include a polarizing element configured to produce polarized light and a tri-acetyl-cellulose (CAC) layer for securing durability.

13. The transparent display device of claim 1 , wherein:

the second substrate is formed of any one of glass, quartz, plastic, and a metal or is formed by depositing an inorganic layer and an organic layer.