Organic light emitting display device

Patent metadata

Field	Value
Publication number	US-9634075-B2
Application number	US-201514826919-A
Country	US
Kind code	B2
Filing date	Aug 14, 2015
Priority date	Jan 20, 2012
Publication date	Apr 25, 2017
Grant date	Apr 25, 2017

Abstract

An organic light emitting display device including: a first emission area including a first organic light emitting diode; a second emission area arranged adjacent to the first emission area and not overlapping with the first emission area, the second emission area including a second organic light emitting diode; a pixel circuit unit electrically connected to the first organic light emitting diode and the second organic light emitting diode; and a transmissive area adjacent to the first and second emission areas and not overlapping with the first and second emission areas, the transmissive area configured to transmit external light therethrough.

First claim

What is claimed is:

1. An organic light emitting display device having a first emission area, a second emission area and a transmissive area, the organic light emitting display device comprising:
a first organic light emitting diode, the first organ light emitting diode which is formed in the first emission area, configured to emit light to a first direction;
a second organic light emitting diode, the second organic light emitting diode which is formed in the second emission area adjacent to the first emission area, configured to emit light to a second direction different from the first direction; and
a pixel circuit unit, the pixel circuit unit comprising a first light emitting thin film transistor (TFT) electrically connected to the first organic light emitting diode and a second light emitting TFT electrically connected to the second organic light emitting diode,
wherein the first and second light emitting TFTs are overlapped with the first organic light emitting diode,
wherein the transmissive area is adjacent to the first and second emission areas and configured to transmit external light therethrough, and
wherein the first organic light emitting diode comprises a first pixel electrode and the second organic light emitting diode comprises a second pixel electrode separated with the first pixel electrode, respectively.

2. The organic light emitting display device of claim 1 , wherein the first organic light emitting diode further comprises a first opposite electrode facing the first pixel electrode, and a first organic layer between the first pixel electrode and the first opposite electrode,
wherein the first pixel electrode is configured to reflect light.

3. The organic light emitting display device of claim 2 , wherein the first pixel electrode comprises a first transparent conductive film, a reflective layer, and a second transparent conductive film.

4. The organic light emitting display device of claim 2 , wherein the first opposite electrode is configured to transmit light therethrough.

5. The organic light emitting display device of claim 4 , wherein the first opposite electrode comprises at least one metal selected from the group consisting of silver (Ag), magnesium (Mg), aluminum (Al), platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), lithium (Li), calcium (Ca), and ytterbium (Yb).

6. The organic light emitting display device of claim 5 , wherein a thickness of the first opposite electrode is about 100 Å to about 300 Å.

7. The organic light emitting display device of claim 2 , wherein the second organic light emitting diode further comprises a second opposite electrode facing the second pixel electrode, and a second organic layer between the second pixel electrode and the second opposite electrode,
wherein the second pixel electrode is configured to transmit light therethrough.

8. The organic light emitting display device of claim 7 , wherein the second pixel electrode comprises a transparent conductive film.

9. The organic light emitting display device of claim 7 , wherein the second pixel electrode comprises a first transparent conductive film, a reflective layer comprising a thin film metal, and a second transparent conductive film.

10. The organic light emitting display device of claim 7 , wherein the first opposite electrode and the second opposite electrode are electrically connected to each other.

11. The organic light emitting display device of claim 7 , wherein the second opposite electrode is a reflective electrode.

12. The organic light emitting display device of claim 1 , further comprising a data line, a scan line, and a power supply source line for supplying a data signal, a scan signal, and power to the pixel circuit unit, respectively,
wherein the pixel circuit unit comprises a first TFT, a second TFT, and a capacitor,
wherein, in the first TFT, a gate electrode is electrically connected to the scan line, a first electrode is electrically connected to the data line, and a second electrode is electrically connected to a gate electrode of the second TFT and the capacitor, and
wherein, in the second TFT, a first electrode is electrically connected to the power supply source line and the capacitor, and a second electrode is electrically connected to the first and second light emitting TFTs.

13. An organic light emitting display device having a first emission area, a second emission area and a transmissive area, the organic light emitting display device comprising:
a first organic light emitting diode, the first organic light emitting diode which is formed in the first emission area, configured to emit light to a first direction;
a second organic light emitting diode, the second organic light emitting diode which is formed in the second emission area adjacent to the first emission area, configured to emit light to a second direction different from the first direction; and
a pixel circuit unit, the pixel circuit unit comprising a first light emitting thin film transistor (TFT) electrically connected to the first organic light emitting diode and a second light emitting TFT electrically connected to the second organic light emitting diode,
wherein the first and second light emitting TFTs are overlapped with the first organic light emitting diode,
wherein the transmissive area is adjacent to the first and second emission areas and configured to transmit external light therethrough,
wherein the first organic light emitting diode comprises a first pixel electrode, a first opposite electrode facing the first pixel electrode, and a first organic layer between the first pixel electrode and the first opposite electrode, wherein the first pixel electrode is configured to reflect light,
wherein the second organic light emitting diode comprising a second pixel electrode, a second opposite electrode facing the second pixel electrode, and a second organic layer between the second pixel electrode and the second opposite electrode, wherein the second pixel electrode is configured to transmit light therethrough, and
wherein the second opposite electrode is a reflective electrode and comprises a metal film.

14. The organic light emitting display device of claim 13 , wherein the second opposite electrode further comprises a semi-transmissive film on or under the metal film.

15. The organic light emitting display device of claim 14 , wherein the metal film and the semi-transmissive film comprise at least one metal selected from the group consisting of silver (Ag), magnesium (Mg), aluminum (Al), platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), neodymium (Nd) iridium (Ir), chromium (Cr), lithium (Li), calcium (Ca), and ytterbium (Yb).

16. The organic light emitting display device of claim 15 , wherein the metal film is thicker than the semi-transmissive film.

Assignees

• Samsung Display Co Ltd

Inventors

• Chung Jin-Koo
• Choi Jun-Ho
• Kim Seong-Min

Classifications

• H10W20/4424

  Copper alloys · CPC title

• H10W20/4407

  Aluminium alloys · CPC title

• H10W20/4405

  the principal metal being aluminium · CPC title

• H10K59/876

  comprising a resonant cavity structure, e.g. Bragg reflector pair · CPC title

• H10K59/80524

  Transparent cathodes, e.g. comprising thin metal layers · CPC title