Energy efficient OLED TV

• US 10,797,112 B2
• Filed: 07/18/2019
• Issued: 10/06/2020
• Est. Priority Date: 07/25/2018
• Status: Active Grant

• Current Assignee: Universal Display Corporation
• Original Assignee: Universal Display Corporation
• Inventors: Hack, Michael, Weaver, Michael Stuart, Thompson, Nicholas J., Brown, Julia J.
• Primary Examiner(s): Dang, Phuc T
• Application Number:
  US16/515,171
• Publication Number:
  US 20200035761A1
• Time in Patent Office: 446 Days
• CPC Class Codes: H10K 2101/10 Triplet emission
• CPC Class Codes: H10K 2102/331 Nanoparticles used in non-emissive layers, e.g. in packaging layer
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 50/115 comprising active inorganic nanostructures, e.g. luminescent quantum dots
• CPC Class Codes: H10K 50/85 Arrangements for extracting light from the devices
• CPC Class Codes: H10K 59/30 Devices specially adapted for multicolour light emission
• 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 59/353 characterised by the geometrical arrangement of the RGB subpixels
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]

Abstract

Embodiments of the disclosed subject matter provide a full-color pixel arrangement for a device, the full-color pixel arrangement including a plurality of sub-pixels, each having an emissive region of a first color, where the full-color pixel arrangement comprises emissive regions having exactly one emissive color that is a red-shifted color of a deep blue sub-pixel of the plurality of sub-pixels. Embodiments of the disclosed subject matter may also provide a full-color pixel arrangement for a device, the full-color pixel arrangement including a plurality of sub-pixels, each having an emissive region of a first color, where the full-color pixel arrangement comprises emissive regions having exactly one emissive color, and where the plurality of sub-pixels comprise a light blue sub-pixel, a deep blue sub-pixel, a red sub-pixel, and a green sub-pixel.

Claims

1. A full-color pixel arrangement for a device, the full-color pixel arrangement comprising:

a plurality of sub-pixels, each having an emissive region of a first color,

wherein the full-color pixel arrangement comprises emissive regions having exactly one emissive color that is a red-shifted color of a deep blue sub-pixel of the plurality of sub-pixels.

2. The full-color pixel arrangement of claim 1, wherein the exactly one emissive color is light blue having a peak wavelength selected from the group consisting of:

greater than or equal to 460 nm, greater than or equal to 465 nm, and greater than or equal to 470 nm.

3. The full-color pixel arrangement of claim 1, wherein the exactly one emissive color is light blue having 1931 CIE coordinates with CIEy selected from the group consisting of:

greater than or equal to 0.20, greater than or equal to 0.15, and greater than or equal to 0.10.

4. The full-color pixel arrangement of claim 1, wherein the exactly one emissive color is formed by a phosphorescent light blue emitter.

5. The full-color pixel arrangement of claim 1, wherein the plurality of sub-pixels comprise:

a light blue sub-pixel, the deep blue sub-pixel, a red sub-pixel, and a green sub-pixel.

6. The full-color pixel arrangement of claim 5, wherein the deep blue sub-pixel is formed by applying a color change medium to the light-blue sub-pixel, and has a resultant color range of 1931 CIE coordinates with CIE y of less than 0.10.

7. The full-color pixel arrangement of claim 5, wherein the deep blue sub-pixel is disposed in a microcavity to blue shift an output of the emissive region.

8. The full-color pixel arrangement of claim 5, wherein red light from the red sub-pixel and green light from the green sub-pixel are generated by down-converting light emitted from the emissive color of the emissive regions by photoemissive quantum dots that are part of the red sub-pixel and the green sub-pixel.

9. The full-color pixel arrangement of claim 5, wherein at least one of the light blue sub-pixel and the deep blue sub-pixel are formed in a cavity structure.

10. The full-color pixel arrangement of claim 5, wherein the emissive regions having exactly one emissive color are selected from the group consisting of:

a single emissive layer including one emitter, a single emissive layer having a plurality of emitters, and a stacked emissive layer device.

11. The full-color pixel arrangement of claim 10, wherein each emissive layer of the stacked emissive layer device has the same type of emitters, a combination of types of emitters, or different types of emitters.

12. The full-color pixel arrangement of claim 5, wherein the deep blue sub-pixel of the pixel arrangement is shared by a plurality of pixels.

13. The full-color pixel arrangement of claim 1, wherein the device is an electroluminescent quantum dot device.

14. A full-color pixel arrangement for a device, the full-color pixel arrangement comprising:

a plurality of sub-pixels, each having an emissive region of a first color,

wherein the full-color pixel arrangement comprises emissive regions having exactly one emissive color,

wherein the exactly one emissive color is light blue having 1931 CIE coordinates with CIEy selected from the group consisting of;

greater than or equal to 0.20, greater than or equal to 0.15, and greater than or equal to 0.10, and

wherein the plurality of sub-pixels comprise a light blue sub-pixel, a deep blue sub-pixel, a red sub-pixel, and a green sub-pixel.

15. The full-color pixel arrangement of claim 14, wherein the exactly one emissive color is light blue having a peak wavelength selected from the group consisting of:

greater than or equal to 460 nm, greater than or equal to 465 nm, and greater than or equal to 470 nm.

16. The full-color pixel arrangement of claim 14, wherein the deep blue sub-pixel is formed by applying a color change medium to the light-blue sub-pixel, and has a resultant color range of 1931 CIE coordinates with CIE y of less than 0.10.

17. The full-color pixel arrangement of claim 14, wherein red light from the red sub-pixel and green light from the green sub-pixel are generated by down-converting light emitted from the emissive color of the emissive regions by photoemissive quantum dots that are part of the red sub-pixel and the green sub-pixel.