ORGANIC LIGHT EMITTING DISPLAY DEVICE AND METHOD OF MANUFACTURING THE SAME

• US 20110220899A1
• Filed: 03/02/2011
• Published: 09/15/2011
• Est. Priority Date: 03/10/2010
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Mobile Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Chung, Jin-Koo, PARK, Byoung-Hee, Lee, Joo-Hyeon
• Granted Patent: US 9,490,311 B2
• Time in Patent Office: Days
• US Class Current: 257/59
• 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 formed 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;

a second electrode formed opposite to the plurality of first electrodes and comprising a plurality of transmission windows corresponding to the second region, wherein each of the transmission windows has an island shape; and

an organic layer formed between the 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. A method of manufacturing an organic light emitting display device, the method comprising:

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

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

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

forming an organic layer on the plurality of first electrodes; and

forming a second electrode on the organic layer by using a mask having a pattern of apertures corresponding to the first region, wherein the second electrode comprises a plurality of transmission windows that correspond to the second regions.

12. The method of claim 11, wherein the apertures are separated from each other at regular intervals.

13. The method of claim 12, wherein the apertures are separated from each other at intervals smaller than or equal to a distance corresponding to at least one pixel.

14. An organic light emitting display device comprising:

a substrate;

a plurality of pixels formed 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;

a second electrode formed on each of the plurality of first electrodes and comprising the plurality of transmission windows corresponding to the second region; and

an organic layer formed between the first electrodes and the second electrode, wherein the transmission windows are separated from one another and each transmission window corresponds to each pixel.

15. The organic light emitting display device of claim 14, wherein the second electrode is formed of a light-reflection material.

16. The organic light emitting display device of claim 14, wherein the plurality of first electrodes are formed of a light-transmission material.

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