OLED device having spacers

• US 20060290276A1
• Filed: 06/22/2005
• Published: 12/28/2006
• Est. Priority Date: 06/22/2005
• Status: Abandoned Application

• Current Assignee: Eastman Kodak Company
• Original Assignee: Eastman Kodak Company
• Inventors: Cok, Ronald S., Winters, Dustin L.
• Application Number:
  US11/158,613
• Publication Number:
  US 20060290276A1
• Time in Patent Office: Days
• US Class Current: 313/512
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 50/8428 Vertical spacers, e.g. arranged between the sealing arrangement and the OLED
• CPC Class Codes: H10K 50/846 comprising getter material or desiccants
• CPC Class Codes: H10K 50/854 comprising scattering means
• CPC Class Codes: H10K 50/865 comprising light absorbing layers, e.g. light-blocking layers
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• CPC Class Codes: H10K 59/8723 Vertical spacers, e.g. arranged between the sealing arrangement and the OLED
• CPC Class Codes: H10K 59/874 including getter material or desiccant
• CPC Class Codes: H10K 59/877 comprising scattering means
• CPC Class Codes: H10K 59/8792 comprising light absorbing layers, e.g. black layers

Abstract

An organic light-emitting diode (OLED) device, comprising: a substrate; one or more OLEDs formed on the substrate comprising a first electrode formed over the substrate, one or more layers of organic material, one of which emits light, formed over the first electrode, and a second electrode formed over the one or more layers of organic material; a cover provided over the OLEDs and spaced apart from the OLEDs to form a gap; and one or more color filter elements located in the gap to filter the light; wherein at least portions of one color filter element or layered combinations of two or more color filter elements form spacer elements having a thickness greater than the thickness of at least another portion of a color filter element located in the gap.

Claims

1. An organic light-emitting diode (OLED) device, comprising:

a substrate;

one or more OLEDs formed on the substrate comprising a first electrode formed over the substrate, one or more layers of organic material, one of which emits light, formed over the first electrode, and a second electrode formed over the one or more layers of organic material;

a cover provided over the OLEDs and spaced apart from the OLEDs to form a gap; and

one or more color filter elements located in the gap to filter the light;

wherein the gap is unfilled or filled with an inert gas air, nitrogen or argon, and at least portions of one color filter element or layered combinations of two or more color filter elements form spacer elements having a thickness more than 500 nm greater than the thickness of at least another portion of a color filter element located in the gap.

2. The OLED device of claim 1, comprising a plurality of OLEDs and wherein the spacer elements are black or form a black matrix.

3. The OLED device of claim 1, comprising a plurality of OLEDs and wherein the spacer elements are positioned between light-emitting areas of adjacent OLEDs.

4. The OLED device of claim 1, wherein the spacer elements comprise two or more overlapping color filters.

5. The OLED device of claim 4, comprising a plurality of OLEDs and wherein the spacer elements comprise two or more different colored color filters that overlap in the area between the light emitting areas of adjacent OLEDs.

7. The OLED device of claim 1, wherein the spacer elements comprise separate color filter elements thicker than other color filters located in the gap.

8. The OLED device of claim 1, wherein the color filter elements comprise screen-printed or photolithographically patterned thick films.

9. The OLED device of claim 1, wherein the spacer elements are in contact with one of the cover and an OLED and are not in contact with the other of the cover and the OLED unless the substrate or cover are stressed.

10. The OLED device of claim 1, wherein the spacer elements are irregularly distributed over the one or more OLEDs.

11. The OLED device of claim 1, wherein the spacer elements are regularly distributed over the one or more OLEDs.

12. The OLED device of claim 1, wherein the spacer elements comprise titanium dioxide, polymer, metal oxide, carbon, carbon black, pigmented inks, dyes, or barium oxide.

13. The OLED device of claim 1, further comprising an encapsulating end-cap affixed to both the cover and the substrate.

15. The OLED device of claim 1, wherein the gap is filled with an inert gas, air, nitrogen, or argon.

16. The OLED device of claim 1, wherein the spacer elements have a thickness equal to or greater than 1 micron.

17. The OLED device of claim 1, further comprising a light scattering layer located between the substrate and cover for scattering light emitted by the OLEDs.

18. The OLED device of claim 1, wherein the gap is maintained at a pressure of less than one atmosphere.

19. The OLED device of claim 1, comprising a plurality of OLEDs each including a broad-band light emitting layer, and an array of two or more different colored color filter elements located in the gap to filter the light, wherein each of the differently colored color filter elements filters the broad-band light to transmit a different colored light.

6. An organic light-emitting diode (OLED) device, comprising:

a substrate,

one or more OLEDs formed on the substrate comprising a first electrode formed over the substrate, one or more layers of organic material one of which emits light, formed over the first electrode, and a second electrode formed over the one or more layers of organic material;

a cover provided over the OLEDs and spaced apart from the OLEDs to form a gap; and

one or more color filter elements located in the gap to filter the light;

wherein at least portions of one color filter element or layered combinations of two or more color filter elements form spacer elements having a thickness greater than the thickness of at least another portion of a color filter element located in the gap and wherein the spacer elements comprise two or more same colored color filters that overlap in the light emitting area over one of the OLEDs.

14. (canceled)