ORGANIC LIGHT EMITTING DIODE DISPLAY AND METHOD FOR MANUFACTURING THE SAME

• US 20100133994A1
• Filed: 07/20/2009
• Published: 06/03/2010
• Est. Priority Date: 12/02/2008
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: LEE, Sang-Woo, KIM, Jung-Yeon, SUNG, Un-Cheol, LEE, Sung-Hun, CHOI, Beohm-Rock, CHOI, Ji-Hye, SONG, Jung-Bae, RHEE, Jung-Soo
• Granted Patent: US 8,410,683 B2
• Time in Patent Office: Days
• US Class Current: 313/504
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 50/816 Multilayers, e.g. transparent multilayers
• CPC Class Codes: H10K 50/852 comprising a resonant cavity structure, e.g. Bragg reflector pair
• CPC Class Codes: H10K 59/35 comprising red-green-blue [RGB] subpixels
• CPC Class Codes: H10K 59/8051 Anodes
• CPC Class Codes: H10K 59/80517 Multilayers, e.g. transparent multilayers
• CPC Class Codes: H10K 59/876 comprising a resonant cavity structure, e.g. Bragg reflector pair
• CPC Class Codes: H10K 85/381 Metal complexes comprising a group IIB metal element, e.g. comprising cadmium, mercury or zinc
• CPC Class Codes: Y02E 10/549 Organic PV cells
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

An organic light emitting device and a manufacturing method thereof is provided. The organic light emitting device includes a first pixel that displays a first color, a second pixel that displays a second color, and a third pixel that displays a third color. The first pixel, the second pixel and the third pixel together form one pixel. Each of the first pixel, second pixel, and third pixel includes a pixel electrode having a transflective electrode, an organic emission layer on the pixel electrode that displays the first color, a common electrode on the third color organic emission layer, and a transparent supplementary member between the pixel electrode and the common electrode.

Claims

1. An organic light emitting device comprising:

a first pixel that displays a first color;

a second pixel that displays a second color; and

a third pixel that displays a third color,

wherein the first pixel, the second pixel and the third pixel together form one pixel group, and

wherein each of the first pixel, the second pixel, and the third pixel comprises;

a pixel electrode having a transflective electrode,

an organic emission layer on the pixel electrode that displays the first color,

a common electrode on the organic emission layer, and

a transparent supplementary member between the pixel electrode and the common electrode.

2. An organic light emitting device comprising:

a first pixel that displays a first color;

a second pixel that displays a second color; and

a third pixel that displays a third color,

wherein the first pixel, second pixel and third pixel together form one pixel group,

wherein each of the first pixel, the second pixel, and the third pixel comprises;

a pixel electrode having a transflective electrode,

a third color organic emission layer on the pixel electrode that displays the third color, and

a common electrode on the third color organic emission layer, and

wherein;

the first pixel further comprises;

a first transparent supplementary member, and

a first color organic emission layer that displays the first color, the first transparent supplementary member and the first color organic emission layer being between the pixel electrode and the common electrode, and

the second pixel further comprises a second color organic emission layer that displays the second color and is between the pixel electrode and the common electrode.

3. The organic light emitting device of claim 2, wherein the transflective electrode is a metal comprising Ag or Al.

4. The organic light emitting device of claim 3, wherein the pixel electrode further comprises a conductive oxide member on or under the transflective electrode.

5. The organic light emitting device of claim 2, further comprising a second transparent supplementary member between the pixel electrode and the common electrode of the third pixel.

6. The organic light emitting device of claim 5, wherein the first transparent supplementary member and the second transparent supplementary member comprise ITO or IZO.

7. The organic light emitting device of claim 6, wherein:

the first transparent supplementary member contacts the pixel electrode of the first pixel, and

the second transparent supplementary member contacts the pixel electrode of the third pixel.

8. The organic light emitting device of claim 2, wherein:

the first pixel further comprises the second color organic emission layer, and

the second pixel further comprises the first color organic emission layer.

9. The organic light emitting device of claim 8, wherein,

in the one pixel group:

the first color organic emission layers of the first pixel and the second pixel are connected to each other and the second color organic emission layers of the first pixel and the second pixel are connected to each other, and

the first color organic emission layer and the second color organic emission layer overlap each other.

10. The organic light emitting device of claim 9, wherein the first color organic emission layer and the second color organic emission layer are under the third color organic emission layer.

11. The organic light emitting device of claim 10, wherein at least one of a hole mobility of the first color organic emission layer and a hole mobility of the second color organic emission layer is less than a hole mobility of the third color organic emission layer.

12. The organic light emitting device of claim 10, wherein at least one of a host of the first color organic emission layer and a host of the second color organic emission layer comprises at least one of a hole transmitting material comprising triphenylamine, a carbazole derivative, or a metallic complex.

13. The organic light emitting device of claim 10, wherein at least one of a host of the first color organic emission layer and a host of the second color organic emission layer comprises at least one of NPB (N,N-di(naphthalene-1-yl)-N,N-diphenyl-benzidene), TPB (tetraphenylbenzidine), CBP (4,4′

-N,N′

-dicarbazolebiphenyl), mCP (N,N-dicarbazolyl-3,5-benzene), TcTa (4,4′

,4″

-tri(N-carbazolyl)triphenylamine), ZnPBO (phenyloxazole), or ZnPBT (phenylthiazole).

14. An organic light emitting device comprising:

a first pixel that displays a first color;

a second pixel that displays a second color; and

a third pixel that displays a third color,

wherein the first pixel, the second pixel and the third pixel together form one pixel group,

wherein each of the first pixel, the second pixel, and the third pixel comprises;

a pixel electrode having a transflective electrode,

a third color organic emission layer on the pixel electrode that displays the third color, and

a common electrode on the third color organic emission layer,

wherein;

the first pixel further comprises a first color organic emission layer that displays the first color and a second color organic emission layer that displays the first color, the first color organic emission layer and the second color organic emission layer being between the pixel electrode and the common electrode, and

the second pixel further comprises the second color organic emission layer between the pixel electrode and the common electrode.

15. The organic light emitting device of claim 14, wherein the transflective electrode comprises a metal comprising Ag or Al.

16. The organic light emitting device of claim 15, wherein the pixel electrode further comprises a conductive oxide member on or under the transflective electrode.

17. The organic light emitting device of claim 14, wherein in the one pixel group, the second color organic emission layers of the first pixel and the second pixel are connected to each other, and the second color organic emission layer is on the first color organic emission layer.

18. The organic light emitting device of claim 14, wherein the first color organic emission layer and the second color organic emission layer are under the third color organic emission layer.

19. The organic light emitting device of claim 18, wherein a hole mobility of the first color organic emission layer is less than a hole mobility of the second color organic emission layer and a hole mobility of the third color organic emission layer.

20. The organic light emitting device of claim 18, wherein a hole mobility of the first color organic emission layer is less than 1×

10<sup>−

4</sup> cm²/Vs when an electric field is 1 MV/cm.