Organic light emitting display device including pixel electrode not formed in light transmissive region
View Patent ↗An organic light emitting display device is disclosed. In one embodiment, the organic light emitting display device includes: i) a substrate having a transmitting region and a plurality of pixel regions separated from each other by the transmitting region, wherein the substrate has first and second surfaces opposing each other; ii) at least one thin film transistor formed in each of the pixel regions over the first surface of the substrate and iii) a passivation film covering the thin film transistors. The device may further include a plurality of pixel electrodes formed on the passivation film, wherein each of the pixel electrodes is electrically connected to and formed substantially directly above the corresponding thin film transistor, wherein each of the pixel electrodes is formed only in the corresponding pixel region, and wherein the pixel electrodes are separated from each other. The device may further include a solar cell active layer formed below the second surface.
1. An organic light emitting display device comprising:
a substrate having a transmitting region and a plurality of pixel regions separated from each other by the transmitting region, wherein the transmitting region is configured to transmit light therethrough, wherein the pixel regions are configured to display an image, and wherein the substrate has first and second surfaces opposing each other;
a plurality of thin film transistors formed in each of the pixel regions over the first surface of the substrate;
a passivation film covering the thin film transistors;
a pixel defining layer formed over the passivation film, wherein the pixel defining layer is not formed directly above any portion of each of the thin film transistors;
a plurality of pixel electrodes formed on the passivation film, wherein each of the pixel electrodes is electrically connected to and formed substantially directly above the corresponding thin film transistor, wherein each of the pixel electrodes is formed only in the corresponding pixel region, and wherein the pixel electrodes are separated from each other;
an organic light emitting layer formed on each of the pixel electrodes and configured to emit light;
a facing electrode formed on the organic light emitting layer and configured to transmit light;
a first electrode formed on the second surface of the substrate;
a solar cell active layer formed on the first electrode; and
a second electrode formed on the solar cell active layer, wherein the first electrode is closer to the substrate than the second electrode.
2. The organic light emitting display device of claim 1 , wherein each of the pixel electrodes has an area substantially identical to that of one of the pixel regions.
3. The organic light emitting display device of claim 1 , further comprising a plurality of conductive lines formed in each of the pixel regions and electrically connected to the corresponding thin film transistor, wherein all of the conductive lines are formed substantially directly below the corresponding pixel electrode.
4. The organic light emitting display device of claim 1 , wherein a ratio of 1) a total area of the transmitting region with respect to 2) a total area of the pixel regions and the transmitting region is between about 20% and about 90%.
5. The organic light emitting display device of claim 1 , wherein the passivation film is formed on both the transmitting region and the pixel regions and wherein the passivation film is formed of a transparent material.
6. The organic light emitting display device of claim 5 , wherein the substrate has a transmittance greater than or equal to that of the passivation film.
7. The organic light emitting display device of claim 1 , wherein the passivation film is formed on both the transmitting region and the pixel regions, and wherein the passivation film has a recess in the transmitting region.
8. The organic light emitting display device of claim 1 , wherein a plurality of insulating films are formed in the transmitting region, and wherein the insulating films have a recess.
9. The organic light emitting display device of claim 1 , wherein at least one of the first electrode and the second electrode is formed of a transparent material.
10. The organic light emitting display device of claim 1 , wherein each of the pixel electrodes has a surface which faces the corresponding thin film transistor, and wherein the surface of the pixel electrode is configured to reflect light.
11. The organic light emitting display device of claim 1 , wherein each of the pixel electrodes has a first length, wherein each of the thin film transistors has a second length, wherein the first and second lengths are defined in a direction substantially parallel with the first surface of the substrate, and wherein the first length is greater than or equal to the second length.
12. An organic light emitting display device comprising:
a substrate having a transmitting region and pixel regions separated from each other by the transmitting region, wherein the transmitting region is configured to transmit light therethrough, wherein the pixel regions are configured to display an image, and wherein the substrate has first and second surfaces opposing each other;
a plurality of pixel circuit units formed in the pixel regions over the first surface of the substrate respectively, wherein each of the pixel circuit units comprises a plurality of thin film transistors;
a first insulating film covering the pixel circuit units;
a pixel defining layer formed over the first insulating film, wherein the pixel defining layer is not formed directly above any portion of each of the thin film transistors;
a plurality of pixel electrodes formed on the first insulating film, wherein each of the pixel electrodes is electrically connected to and formed substantially directly above the corresponding pixel circuit unit, and wherein the pixel electrodes are separated from each other and formed only in the pixel regions;
an organic light emitting layer formed on each of the pixel electrodes and configured to emit light;
a facing electrode formed on the organic light emitting layer and configured to transmit light;
a first electrode formed on the second surface of the substrate;
a solar cell active layer formed on the first electrode; and
a second electrode formed on the solar cell active layer, wherein the first electrode is closer to the substrate than the second electrode.
13. The organic light emitting display device of claim 12 , wherein each of the pixel electrodes has an area substantially identical to that of one of the pixel regions.
14. The organic light emitting display device of claim 12 , further comprising a plurality of conductive lines formed in each of the pixel regions and electrically connected to the corresponding pixel circuit unit, wherein the conductive lines are formed substantially directly below the corresponding pixel electrode.
15. The organic light emitting display device of claim 12 , wherein a ratio of 1) a total area of the transmitting region with respect to 2) a total area of the pixel regions and the transmitting region is between about 20% and about 90%.
16. The organic light emitting display device of claim 12 , wherein the transmitting region and the pixel regions each comprise the first insulating film and a plurality of second insulating films, and wherein the first insulating film and the second insulating films are formed of a transparent material.
17. The organic light emitting display device of claim 16 , wherein the substrate has a transmittance greater than or equal to the total transmittance of the first insulating film and the second insulating films.
18. The organic light emitting display device of claim 12 , wherein the transmitting region and the pixel regions each comprise the first insulating film and a plurality of second insulating films, wherein at least one of the first insulating film and the second insulating films has a recess in the transmitting region.