High resolution low power consumption OLED display with extended lifetime

• US 9,590,017 B2
• Filed: 04/02/2014
• Issued: 03/07/2017
• Est. Priority Date: 01/18/2013
• Status: Active Grant

• Current Assignee: Universal Display Corporation
• Original Assignee: Universal Display Corporation
• Inventors: Hack, Michael, Weaver, Michael Stuart, Brown, Julia J., Xu, Xin
• Primary Examiner(s): Maldonado, Julio J
• Assistant Examiner(s): Rahman, Moin
• Application Number:
  US14/243,145
• Publication Number:
  US 20140209888A1
• Time in Patent Office: 1,070 Days
• Field of Search: 438 22- 47, 438/69, 438/493, 438/503, 438/507, 438/956, 257/13, 257 79-103, 257/918, 257/40, 257642-643, 257/759
• US Class Current: 1/1
• CPC Class Codes: H10K 2101/10 Triplet emission
• CPC Class Codes: H10K 2102/3026 Top emission
• CPC Class Codes: H10K 2102/321 Inverted OLED, i.e. having cathode between substrate and anode
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 59/1201 Manufacture or treatment
• CPC Class Codes: H10K 59/35 comprising red-green-blue [RGB] subpixels
• CPC Class Codes: H10K 59/351 comprising more than three subpixels, e.g. red-green-blue-white [RGBW]
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/166 using selective deposition, e.g. using a mask

Abstract

Arrangements of pixel components that allow for full-color devices, while using emissive devices that use blue color altering layers in conjunction with blue emissive regions, that emit at not more than two colors, and/or that use limited number of color altering layers, are provided. Devices disclosed herein also may be achieved using simplified fabrication techniques compared to conventional side-by-side arrangements, because fewer masking steps may be required.

Claims

1. A full-color pixel arrangement for an OLED device comprising:

at least four sub-pixels comprising;

a first sub-pixel comprising a first emissive region configured to emit blue light, the first emissive region comprising an emissive material that emits light having a peak wavelength in the range of about 400-500 nm, wherein the first emissive region does not include any color altering layers;

a first color altering layer disposed in a stack with the first sub-pixel; and

a second emissive region configured to emit yellow light or green light;

wherein the full-color pixel arrangement comprises emissive regions of not more than two colors.

2. The arrangement of claim 1, wherein the first color altering layer comprises a deep blue color altering layer.

3. The arrangement of claim 1, wherein the first color altering layer comprises a light blue color altering layer.

4. The arrangement of claim 1, further comprising a second sub-pixel of the at least four sub-pixels, the second sub-pixel comprising the second emissive region.

5. The arrangement of claim 4, further comprising a third sub-pixel of the at least four sub-pixels, the third sub-pixel comprising an emissive region configured to emit the same color light as the emissive region of the second sub pixel.

6. The arrangement of claim 5, further comprising a second color altering layer disposed in a stack with the second sub-pixel.

7. The arrangement of claim 6, further comprising a fourth sub-pixel of the at least four sub-pixels, the fourth sub-pixel comprising an emissive region configured to emit the same color light as the emissive region of the second subpixel.

8. The arrangement of claim 6, wherein the emissive region of the second sub-pixel emits yellow light and the second color altering layer comprises a green color altering layer.

9. The arrangement of claim 6, wherein the emissive region of the second sub-pixel emits green light and the second color altering layer comprises a red color altering layer.

10. The arrangement of claim 6, further comprising a third color altering layer disposed in a stack with the third sub-pixel.

11. The arrangement of claim 10, wherein the emissive region of the second sub-pixel emits yellow light, the second color altering layer comprises a green color altering layer, and the third color altering layer comprises a red color altering layer.

12. The arrangement a claim 10, wherein the emissive region of the second sub-pixel emits green light, the second color altering layer comprises a green color altering layer, and the third color altering layer comprises a red color altering layer.