ARRAY OF LIGHT-EMITTING OLED MICROCAVITY PIXELS

• US 20050280008A1
• Filed: 06/16/2004
• Published: 12/22/2005
• Est. Priority Date: 06/16/2004
• Status: Active Grant

• Current Assignee: Global OLED Technology LLC (LG Display Co., Ltd.)
• Original Assignee: Eastman Kodak Company
• Inventors: Spindler, Jeffrey P., Shore, Joel D., Hatwar, Tukaram K., Winters, Dustin L., Ricks, Michele L.
• Granted Patent: US 7,023,013 B2
• Time in Patent Office: Days
• US Class Current: 257/79
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: C09K 2211/1007 Non-condensed systems
• CPC Class Codes: C09K 2211/1011 Condensed systems
• CPC Class Codes: C09K 2211/1029 containing one nitrogen atom as the heteroatom
• CPC Class Codes: C09K 2211/104 with other heteroatoms
• CPC Class Codes: C09K 2211/107 with other heteroatoms
• CPC Class Codes: C09K 2211/1088 containing oxygen as the only heteroatom
• CPC Class Codes: C09K 2211/185 of the platinum group, i.e. Os, Ir, Pt, Ru, Rh or Pd
• CPC Class Codes: H05B 33/14 characterised by the chemical or physical composition or the arrangement of the electroluminescent material , or by the simultaneous addition of the electroluminescent material in or onto the light source
• CPC Class Codes: H10K 2101/10 Triplet emission
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 50/125 specially adapted for multicolour light emission, e.g. for emitting white light
• CPC Class Codes: H10K 50/14 Carrier transporting layers
• CPC Class Codes: H10K 50/8428 Vertical spacers, e.g. arranged between the sealing arrangement and the OLED
• CPC Class Codes: H10K 50/8445 multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers
• CPC Class Codes: H10K 50/852 comprising a resonant cavity structure, e.g. Bragg reflector pair
• CPC Class Codes: H10K 50/86 Arrangements for improving contrast, e.g. preventing reflection of ambient light
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• CPC Class Codes: H10K 85/322 comprising boron
• CPC Class Codes: H10K 85/342 comprising iridium
• CPC Class Codes: H10K 85/346 : comprising platinum
• CPC Class Codes: H10K 85/351 : Metal complexes comprising lanthanides or actinides, e.g. comprising europium
• CPC Class Codes: H10K 85/622 : containing four rings, e.g. pyrene
• CPC Class Codes: H10K 85/623 : containing five rings, e.g. pentacene
• CPC Class Codes: H10K 85/624 : containing six or more rings
• CPC Class Codes: H10K 85/626 : containing more than one polycyclic condensed aromatic rings, e.g. bis-anthracene
• CPC Class Codes: H10K 85/649 : Aromatic compounds comprising a hetero atom

Abstract

A color OLED display having at least three different colored microcavity pixels, each including a light reflective structure and a semi-transparent structure includes an array of light-emitting microcavity pixels each having one or more common organic light-emitting layers, said light-emitting layer(s) including first and second light-emitting materials, respectively, that produce different light spectra, the first light-emitting material producing light having a first spectrum portion that extends between first and second different colors of the array, and the second light-emitting material producing light having a second spectrum portion that is substantially contained within a third color that is different from the first and second colors, and each different colored pixel being tuned to produce light in one of the three different colors whereby the first, second, and third different colors are produced by the OLED display.

Claims

1. A color OLED display having at least three different colored microcavity pixels, each including a light reflective structure and a semi-transparent structure, comprising:

a) an array of light-emitting microcavity pixels each having one or more common organic light-emitting layers, said light-emitting layer(s) including first and second light-emitting materials, respectively, that produce different light spectra, the first light-emitting material producing light having a first spectrum portion that extends between first and second different colors of the array, and the second light-emitting material producing light having a second spectrum portion that is substantially contained within a third color that is different from the first and second colors; and

b) each different colored pixel being tuned to produce light in one of the three different colors whereby the first, second, and third different colors are produced by the OLED display.

2. The OLED display of claim 1 wherein the first and second light-emitting materials are contained in separate layers and wherein the blue-green light-emitting layer includes a first host and a blue-green light-emitting compound, and the red light-emitting layer includes a second host and a red light-emitting compound.

3. The color OLED display of claim 2 wherein the first host comprises a mixture of host materials.

4. The color OLED display of claim 2 wherein the second host comprises a mixture of host materials.

5. The color OLED display of claim 2 wherein the red light-emitting compound has a full width at half maximum contained within the wavelength range of 560 nm and 700 nm.

6. The color OLED display of claim 5 wherein the red light-emitting compound has a full width at half maximum of between 5 and 90 nm.

7. The color OLED display of claim 2 wherein the red light-emitting compound is a diindenoperylene compound.

8. The color OLED display of claim 7 wherein the diindenoperylene compound has the following structure

9. The color OLED display of claim 8 wherein the diindenoperylene compound is

10. The OLED display of claim 2 wherein the blue-green light-emitting compound is a distyrylamine derivative.

11. The OLED display of claim 1 wherein the first and second light-emitting materials are contained in separate layers and wherein the yellow-orange light-emitting layer includes a first host and a yellow light-emitting compound, and the blue light-emitting layer includes a second host and a blue light-emitting compound.

12. The color OLED display of claim 11 wherein the first host comprises a mixture of host materials.

13. The color OLED display of claim 11 wherein the second host comprises a mixture of host materials.

14. The color OLED display of claim 11 wherein the blue light-emitting compound has a full width at half maximum contained within the wavelength range of 400 nm and 490 nm.

15. The color OLED display of claim 14 wherein the blue light-emitting compound has a full width at half maximum of between 5 and 25 nm.

16. The color OLED display of claim 11 wherein the blue light-emitting compound is a bis(azinyl)azene boron complex.

17. The color OLED display of claim 16 wherein the bis(azinyl)azene boron complex has the following structure

18. The color OLED display of claim 17 wherein the bis(azinyl)azene boron complex is

19. The OLED display of claim 11 wherein the yellow light-emitting compound includes a tetracene derivative.

20. The OLED device of claim 1 where the reflector, the semitransparent reflector, or both, also serve as electrodes for the light-emitting layers.

21. The color OLED display of claim 1 wherein the material for reflector includes Ag, Au, Al, or alloys thereof.

22. The color OLED display of claim 1 wherein the material for the semitransparent reflector includes Ag, Au, or alloys thereof.

23. The color OLED display of claim 1 wherein at least two of the different colored microcavity pixels further include a cavity spacer layer wherein the thickness of the cavity spacer layer is different for each of said different colored microcavity pixels.

24. The color OLED display of claim 1 wherein the semitransparent reflector is disposed between the light-emitting layers and the substrate.

25. The color OLED display of claim 1 wherein the reflector is disposed between the light-emitting layers and the substrate.

26. The color OLED display of claim 1 wherein the thickness of at least one of the organic layers other than the light-emitting layers is changed for each different colored pixel.

27. The color OLED display of claim 1 further including a color filter array disposed in operative association with one or more of the array of light-emitting microcavity pixels that filters light corresponding to the portions of the array corresponding to the red, green, and blue portions.

28. The color OLED display of claim 11 wherein at least one of the hosts is an anthracene derivative having the following formula:

29. The color OLED display of claim 28 wherein Ar in general formula (1) is selected from the general formulas given below:

30. The color OLED display of claim 28 wherein the host is selected from: