Organic white light emitting display apparatus

Patent metadata

Field	Value
Publication number	US-9419242-B2
Application number	US-201414222417-A
Country	US
Kind code	B2
Filing date	Mar 21, 2014
Priority date	May 31, 2013
Publication date	Aug 16, 2016
Grant date	Aug 16, 2016

Abstract

Disclosed is an organic white light emitting display apparatus. The organic white light emitting device includes a first substrate including a first sub-pixel area, a second sub-pixel area, a third sub-pixel area, and an organic light emitting device (OLED) that includes a first electrode, a second electrode, and an organic white light emitting layer interposed between the first and second electrodes, and emits whit light for respective sub-pixel areas, a second substrate including first, second, and third color filters of different colors formed on positions corresponding to the respective sub-pixel areas, the second substrate being arranged to face the first substrate, and a partition wall that is extended to an area between neighboring color filters among the color filters and partitions the sub-pixel areas, the partition wall being formed on the first substrate.

First claim

What is claimed is:

1. An organic white light emitting display apparatus comprising:
a first substrate including a first sub-pixel area, a second sub-pixel area, a third sub-pixel area, wherein an organic light emitting device (OLED) is formed in each sub-pixel area, the OLED includes a first electrode, a second electrode, and an organic white light emitting layer interposed between the first and second electrodes configured to emit white light;
a second substrate facing the first substrate and including first, second, and third color filters of different colors and black matrix between neighboring color filters, wherein the first, second, and third color filters are corresponding to the respective sub-pixel areas;
a partition wall formed on the first substrate; and
a first pixel defined layer disposed below the partition wall;
wherein the partition wall extends toward the black matrix and partitions the sub-pixel areas, and
wherein the first electrode is disposed over the first pixel defined layer such that i) a part of the first electrode and the organic white light emitting layer are disposed within an opening defined in the first pixel defined layer and ii) a peripheral part of the first electrode is disposed over an inclined surface of the first pixel defined layer surrounding the opening, and at least a portion of the peripheral part of the first electrode is between the first pixel defined layer and the partition wall.

2. The organic white light emitting display apparatus of claim 1 , wherein the second electrode of the OLED is formed on the partition wall.

3. The organic white light emitting display apparatus of claim 1 , wherein the second substrate includes a black matrix formed between the neighboring color filters.

4. The organic white light emitting display apparatus of claim 1 , wherein the partition wall comprises a pigment of a color other than colors of color filters arranged at both sides on the basis of the partition wall.

5. The organic white light emitting display apparatus of claim 4 , wherein a partition wall arranged between the first color filter and the second color filter comprises a pigment of the third color, a partition wall arranged between the second color filter and the third color filter comprises a pigment of the first color, and a partition wall arranged between the third color filter and the first color filter comprises a pigment of the second color.

6. The organic white light emitting display apparatus of claim 1 , wherein the first color is red, the second color is green, and the third color is blue.

7. The organic white light emitting display apparatus of claim 1 , further comprising:
a thin film transistor (TFT) formed on the first substrate;
a planarization layer formed on the TFT; and
a second pixel defined layer between the first pixel defined layer and the partition wall.

8. The organic white light emitting display apparatus of claim 7 , wherein the partition wall is formed on the second pixel defined layer.

9. The organic white light emitting display apparatus of claim 8 , wherein the partition wall and the second pixel defined layer are integrally formed.

10. The organic white light emitting display apparatus of claim 7 , wherein the second pixel defined layer covers the first electrode formed on the inclined surface of the first pixel defined layer.

11. An organic white light emitting display apparatus comprising:
a first substrate including red, green, and blue sub-pixel areas;
a second substrate facing the first substrate and including red, green, and blue color filters formed at positions corresponding to the sub-pixel areas;
a pixel defined layer formed on the first substrate, wherein the pixel defined layer defines the sub-pixel areas;
a partition wall formed on the pixel defined layer, extending toward the second substrate and partitioning the sub-pixel areas;
a first electrode formed on the first substrate and positioned for each of the sub-pixel areas;
an intermediate layer formed on the first electrode and including an organic white light emitting layer; and
a second electrode formed on the intermediate layer and the partition wall,
wherein the first electrode is disposed over the pixel defined layer such that i) a part of the first electrode and the intermediate layer are disposed within an opening defined in the pixel defined layer and ii) a peripheral part of the first electrode is disposed over an inclined surface of the pixel defined layer surrounding the opening, and at least a portion of the peripheral part of the first electrode is between the pixel defined layer and the partition wall.

12. The organic white light emitting display apparatus of claim 11 , wherein the partition wall comprises a pigment of a color other than colors of color filters arranged at both sides on the basis of the partition wall.

13. The organic white light emitting display apparatus of claim 11 , wherein a partition wall between the red color filter and the green color filter comprises a blue pigment, a partition wall between the green color filter and the blue color filter comprises a red pigment, and a partition wall between the blue color filter and the red color filter comprises a green pigment.

14. The organic white light emitting display apparatus of claim 11 , further comprising:
a thin film transistor (TFT) formed on the first substrate;
a planarization layer formed on the TFT and below the pixel defined layer; and
a first pixel defined layer formed on the planarization layer; and
a second pixel defined layer between the pixel defined layer and the partition wall.

15. The organic white light emitting display apparatus of claim 11 , wherein the first electrode includes reflective metal.

16. The organic white light emitting display apparatus of claim 14 , wherein the partition wall is formed on the second pixel defined layer.

17. The organic white light emitting display apparatus of claim 16 , wherein the partition wall and the second pixel defined layer are integrally formed.

18. The organic white light emitting display apparatus of claim 11 , wherein the second substrate further includes a black matrix between the neighboring color filters.

19. The organic white light emitting display apparatus of claim 18 , wherein an upper part of the partition wall is arranged to correspond to the black matrix.

20. The organic white light emitting display apparatus of claim 11 , wherein the second electrode has translucency and reflexibility that reflects at least some light, which is emitted toward the partition wall among white light emitted from the intermediate layer, toward the second substrate.

21. The organic white light emitting display apparatus of claim 1 , wherein a first distance from the first substrate to the part of the first electrode is lower than a second distance from the first substrate to the peripheral part of the first electrode.

22. The organic white light emitting display apparatus of claim 11 , wherein a first distance from the first substrate to the part of the first electrode is lower than a second distance from the first substrate to the peripheral part of the first electrode.

Assignees

• Samsung Display Co Ltd

Inventors

• Baek Soo-Min
• Kim Min-Woo
• Kim Il-Nam
• Lim Jae-Ik

Classifications

• H10K59/875

  Arrangements for extracting light from the devices · CPC title

• H10K59/8723

  Vertical spacers, e.g. arranged between the sealing arrangement and the OLED · CPC title

• H10K59/122 Primary

  Pixel-defining structures or layers, e.g. banks · CPC title

• H10K59/38 Primary

  comprising colour filters or colour changing media [CCM] · CPC title

• H01L27/3246

  Electricity · mapped topic