Organic light emitting display device and method of manufacturing the same

• US 9,490,311 B2
• Filed: 03/02/2011
• Issued: 11/08/2016
• Est. Priority Date: 03/10/2010
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Park, Byoung-Hee, Chung, Jin-Koo, Lee, Joo-Hyeon
• Primary Examiner(s): Payen, Marvin
• Application Number:
  US13/038,836
• Publication Number:
  US 20110220899A1
• Time in Patent Office: 2,078 Days
• Field of Search: 257/59, 257/72, 257/100, 257/103, 257/E33.055, 438/34
• US Class Current: 1/1
• CPC Class Codes: H01L 29/7869 having a semiconductor body comprising an oxide semiconductor material, e.g. zinc oxide, copper aluminium oxide, cadmium stannate
• CPC Class Codes: H10K 2102/3031 Two-side emission, e.g. transparent OLEDs [TOLED]
• CPC Class Codes: H10K 50/82 Cathodes
• CPC Class Codes: H10K 50/826 Multilayers, e.g. opaque multilayers
• CPC Class Codes: H10K 50/828 Transparent cathodes, e.g. comprising thin metal layers
• CPC Class Codes: H10K 59/1201 Manufacture or treatment
• CPC Class Codes: H10K 59/121 characterised by the geometry or disposition of pixel elements
• CPC Class Codes: H10K 59/126 Shielding, e.g. light-blocking means over the TFTs
• CPC Class Codes: H10K 59/35 comprising red-green-blue [RGB] subpixels
• CPC Class Codes: H10K 71/621 Providing a shape to conductive layers, e.g. patterning or selective deposition

Abstract

An organic light emitting display device having high transmittance with respect to external light and a method of manufacturing the same. The organic light emitting display device includes a substrate; a plurality of pixels formed on the substrate, each of the pixels including a first region that emits light and a second region that transmits external light; a plurality of thin film transistors disposed in the first region of each pixel; a plurality of first electrodes disposed in the first region of each pixel and electrically connected to the thin film transistors, respectively; a second electrode formed opposite to the plurality of first electrodes and comprising a plurality of transmission windows corresponding to the second regions; and an organic layer formed between the first electrodes and the second electrode. The transmission windows can be formed in the second electrode, that is, a cathode.

Claims

1. An organic light emitting display device comprising:

a substrate;

a plurality of pixels disposed on the substrate, each pixel comprising a first region that emits light and a second region that transmits external light;

a plurality of thin film transistors disposed in the first region of each pixel;

a plurality of first electrodes disposed in the first region of each pixel and electrically connected to the thin film transistors, respectively;

an organic layer on the first electrodes;

a second electrode disposed facing the plurality of first electrodes, the second electrode defining a plurality of transmission windows, the second electrode being absent in the transmission windows, each of the transmission windows corresponding to the second region, wherein;

each of the transmission windows has an island shape in a plan view of the organic light emitting display device,

the transmission windows do not overlap with the plurality of first electrodes,

the plurality of first electrodes are spaced apart from the second electrode, and

the organic layer is between each of the plurality of first electrodes and the second electrode.

2. The organic light emitting display device of claim 1, wherein the transmission windows are separated from one another for each pixel.

3. The organic light emitting display device of claim 1, wherein the transmission windows in at least two adjacent pixels are connected to each other.

4. The organic light emitting display device of claim 1, wherein the second electrode is formed of a light-reflection material.

5. The organic light emitting display device of claim 1, wherein the plurality of first electrodes are formed of a light-transmission material.

6. The organic light emitting display device of claim 1, wherein the plurality of first electrodes overlap the plurality of thin film transistors.

7. The organic light emitting display device of claim 1, wherein the first region of each pixel comprises an emission region and a circuit region, the thin film transistors are disposed in the circuit region, and the first electrode is disposed in the emission region.

8. The organic light emitting display device of claim 7, wherein the emission region and the circuit region of each pixel are adjacent to each other.

9. The organic light emitting display device of claim 1, wherein an image is displayed in the first region of each pixel, and external light passes through the second region of each pixel.

10. The organic light emitting display device of claim 1, wherein the second region of each pixel does not include a thin film transistor, a capacitor and an organic light emitting device.

11. An organic light emitting display device comprising:

a substrate;

a plurality of pixels disposed on the substrate, each pixel comprising a first region that emits light, the first region including a circuit region and an emission region, and a second region that transmits external light through a plurality of transmission windows;

a plurality of thin film transistors disposed in the circuit region of each pixel;

a plurality of first electrodes disposed in the first region of each pixel and electrically connected to the thin film transistors, wherein the transmission windows do not overlap with the plurality of first electrodes;

an organic layer on the plurality of first electrodes;

a second electrode disposed on the organic layer and facing the plurality of first electrodes, the second electrode defining the plurality of transmission windows corresponding to the second region; and

wherein;

the transmission windows are separated from one another and each transmission window corresponds to each pixel, and the second electrode being absent in the transmission windows,

the plurality of first electrodes are spaced apart from the second electrode, and

the organic layer is between each of the plurality of first electrodes and the second electrode.

12. The organic light emitting display device of claim 11, wherein the second electrode is formed of a light-reflection material.

13. The organic light emitting display device of claim 11, wherein the plurality of first electrodes are formed of a light-transmission material.

14. The organic light emitting display device of claim 11, wherein the plurality of first electrodes overlap the plurality of thin film transistors.