OLED display architecture

• US 8,827,488 B2
• Filed: 04/08/2011
• Issued: 09/09/2014
• Est. Priority Date: 10/01/2008
• Status: Active Grant

• Current Assignee: Universal Display Corporation
• Original Assignee: Universal Display Corporation
• Inventors: Weaver, Michael S., Hack, Michael, Silverstein, Louis D.
• Primary Examiner(s): GRAMLING, SEAN P
• Application Number:
  US13/082,851
• Publication Number:
  US 20110248294A1
• Time in Patent Office: 1,250 Days
• Field of Search: 362/231, 362/249.02
• US Class Current: 362/231
• CPC Class Codes: H01L 2224/16225 the item being non-metallic, e.g. insulating substrate with or without metallisation
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H01L 2924/12044 OLED
• CPC Class Codes: H10K 2101/00 Properties of the organic materials covered by group H10K85/00
• CPC Class Codes: H10K 2101/10 Triplet emission
• CPC Class Codes: H10K 2101/27 Combination of fluorescent and phosphorescent emission
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 59/32 Stacked devices having two or more layers, each emitting at different wavelengths
• CPC Class Codes: H10K 59/351 comprising more than three subpixels, e.g. red-green-blue-white [RGBW]
• CPC Class Codes: H10K 59/90 Assemblies of multiple devices comprising at least one organic light-emitting element

Abstract

A device that may be used as a multi-color pixel is provided. The device has a first organic light emitting device, a second organic light emitting device, a third organic light emitting device, and a fourth organic light emitting device. The device may be a pixel of a display having four sub-pixels. The first device may emit red light, the second device may emit green light, the third device may emit light blue light and the fourth device may emit deep blue light. The device includes a first device plane and a second device plane. The first device plane comprises a plurality of the first organic light emitting device and a plurality of the second organic light emitting device. The second device plane comprises a plurality of at least one of the third organic light emitting device and the fourth organic light emitting device. The planes of the first and second device planes are parallel. The second device plane is transposed from the first device plane in a direction perpendicular to the planes of the first and second device planes. The first and second device planes are superposed.

Claims

1. A first device, comprising:

a plurality of pixels, wherein each pixel includes an R sub-pixel, a G sub-pixel, a B1 sub-pixel and a B2 sub-pixel, wherein;

each R sub-pixel comprises a first organic light emitting device that emits light having a peak wavelength in the visible spectrum of 580-700 nm, further comprising a first emissive layer having a first emitting material;

each G sub-pixel comprises a second organic light emitting device that emits light having a peak wavelength in the visible spectrum of 500-580 nm, further comprising a second emissive layer having a second emitting material;

each B1 sub-pixel comprises a third organic light emitting device that emits light having a peak wavelength in the visible spectrum of 400-500 nm, further comprising a third emissive layer having a third emitting material;

each B2 sub-pixel comprises a fourth organic light emitting device that emits light having a peak wavelength in the visible spectrum of 400 to 500 nm, further comprising a fourth emissive layer having a fourth emitting material;

the third emitting material is different from the fourth emitting material; and

the peak wavelength in the visible spectrum of light emitted by the fourth organic light emitting device is at least 4 nm less than the peak wavelength in the visible spectrum of light emitted by the third organic light emitting device;

a first device plane comprising a plurality of the first organic light emitting device and a plurality of the second organic light emitting device, wherein the first device plane is parallel to the plane of the plurality of the first organic light emitting device and a plurality of the second organic light emitting device;

a second device plane comprising a plurality of at least one of the third organic light emitting device and the fourth organic light emitting device, wherein the second device plane is parallel to the Diane of the at least one of the third organic light emitting device and fourth organic light emitting device;

wherein the planes of the first and second device planes are parallel, the second device plane is transposed from the first device plane in a direction perpendicular to the planes of the first and second device planes, and the first and second device planes are superposed.

2. The first device of claim 1, wherein the second device plane comprises a plurality of the third organic light emitting device, and a plurality of the fourth organic light emitting device.

3. The first device of claim 1, wherein the first device plane comprises a plurality of the first organic light emitting device, a plurality of the second organic light emitting device, and a plurality of the third organic light emitting device, and the second device plane comprises a plurality of the fourth organic light emitting device.

4. The first device of claim 1, wherein the first device plane comprises a plurality of the first organic light emitting device, a plurality of the second organic light emitting device, and a plurality of the fourth organic light emitting device, and the second device plane comprises a plurality of the third organic light emitting device.

5. The first device of claim 1, wherein at least one of the first and second device planes has a fill factor of at least 30%.

6. The first device of claim 1, wherein the first device is configured such that the first device plane is closer to a viewing direction than the second device plane.

7. The first device of claim 1, wherein the first device is a display panel.

8. The first device of claim 1, wherein the first device is a consumer device.

9. The first device of claim 1, wherein the first, second and third emitting materials are phosphorescent, and the fourth emitting material is fluorescent.

10. The first device of claim 1, wherein the first, second, third and fourth emitting materials are phosphorescent.

11. The first device of claim 1, wherein the first and second materials are phosphorescent, and the third and fourth emitting materials are fluorescent.