Transparent display apparatus with transparent electroluminescent display unit

1. A display apparatus, including:

a driving substrate, including:

a substrate;

a display area;

a non-display area; and

a transparent driving element, disposed in the non-display area to form a transparent region, wherein the transparent driving element includes:

a first transparent thin film transistor disposed over the substrate and electrically connected to the organic light emitting diode device;

a plurality of transparent circuit layers disposed over the substrate and electrically connected to the first transparent thin film transistor; and

a second transparent TFT disposed over the substrate and electrically connected to the first transparent thin film transistor and the transparent circuit layers; and

an organic light emitting diode device, disposed over the driving substrate and located in the display area to form a non-transparent region.

2. The display apparatus according to claim 1 , wherein the organic light emitting diode device includes:

a transparent electrode disposed over the substrate;

an organic electroluminescent layer disposed over the transparent electrode; and

an opaque metal layer disposed over the organic electroluminescent layer.

3. The display apparatus according to claim 1 , wherein the transparent circuit layers constitute a transparent circuit element having a transparent capacitor.

4. The display apparatus according to claim 3 , wherein the transparent circuit element further includes a transparent thin film transistor, a transparent capacitor, a transparent power supply line, a transparent data line, a transparent scan line, a capacitance line or arbitrary combinations of thereof.

5. The display apparatus according to claim 1 , wherein the driving substrate further includes:

a passivation layer, covering the transparent driving element and disposed between the organic light emitting diode device and the transparent driving element; and

a conductive wire, penetrating the passivation layer to electrically connect to the organic light emitting diode device and the first transparent thin film transistor.

6. The display apparatus according to claim 1 , wherein each transparent circuit layer includes a chromium molybdenum (MoCr) thin layer and an indium tin oxide (InSnO) layer.

7. The display apparatus according to claim 1 , wherein each of the first transparent thin film transistor and the second transparent thin film transistor includes:

a transparent gate electrode disposed over the substrate;

a transparent gate insulating layer disposed over the transparent gate electrode;

a transparent source electrode disposed over the transparent gate insulating layer;

a transparent drain electrode disposed over the transparent gate insulating layer and separated from the transparent source electrode; and

a transparent channel layer disposed over the transparent insulating layer and in contact with the transparent source electrode and the transparent drain electrode.

8. The display apparatus according to claim 7 , wherein each of the transparent gate electrode, the transparent source electrode and the transparent drain electrode includes a chromium molybdenum thin layer and an indium tin oxide layer;

and the transparent channel layer is composed of an oxide semiconductor material including indium, gallium, zinc, or arbitrary combinations of thereof.

9. The display apparatus according to claim 8 , wherein the oxide semiconductor material is selected from a group consisting of indium oxide (InO), gallium oxide (GaO), zinc oxide (ZnO), indium gallium zinc oxide (InGaZnO), gallium zinc oxide (GaZnO), indium gallium oxide (InGaO) and indium zinc oxide (InZnO).