Hybrid display

• US 9,818,804 B2
• Filed: 09/18/2015
• Issued: 11/14/2017
• Est. Priority Date: 09/18/2015
• Status: Active Grant

• Current Assignee: Universal Display Corporation
• Original Assignee: Universal Display Corporation
• Inventors: Hack, Michael, Weaver, Michael Stuart, Mayweather, III, William T., Brown, Julia J., Thompson, Nicholas J.
• Primary Examiner(s): DANG, PHUC T
• Application Number:
  US14/858,875
• Publication Number:
  US 20170084671A1
• Time in Patent Office: 788 Days
• CPC Class Codes: H10K 59/00 Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
• CPC Class Codes: H10K 59/351 comprising more than three subpixels, e.g. red-green-blue-white [RGBW]
• CPC Class Codes: Y02E 10/549 Organic PV cells

Abstract

A hybrid pixel arrangement for a full-color display is provided, which includes an inorganic LED in at least one sub-pixel, and an organic emissive stack in at least one other sub-pixel. In an embodiment, a first sub-pixel is configured to emit a first color, and includes an inorganic LED, a second sub-pixel is configured to emit a second color, and includes a first portion of a first organic emissive stack configured to emit an initial color different from the first color. A third sub-pixel is configured to emit a third color different from the initial color, and includes a second portion of the first organic emissive stack, and a first color altering layer disposed in a stack with the second portion of the first organic emissive stack.

Claims

1. A full-color pixel arrangement for a full-color display, the arrangement comprising a plurality of pixels, each pixel comprising:

a first sub-pixel configured to emit a first color, the first sub-pixel comprising an inorganic light-emitting diode (LED);

a second sub-pixel configured to emit a second color, the second sub-pixel comprising a first portion of a first organic emissive stack configured to emit an initial color different from the first color; and

a third sub-pixel configured to emit a third color different from the initial color, the third sub-pixel comprising;

a second portion of the first organic emissive stack; and

a first color altering layer disposed in a stack with the second portion of the first organic emissive stack;

wherein each inorganic light-emitting diode in the pixel is configured to emit the first color.

2. The pixel arrangement of claim 1, wherein the second color is the initial color.

3. The pixel arrangement of claim 1, wherein the initial color is yellow.

4. The pixel arrangement of claim 1, wherein the first color is blue.

5. The pixel arrangement of claim 1, wherein the LED is a micro-LED.

6. The pixel arrangement of claim 1, wherein the first organic emissive stack comprises a single organic emissive layer.

7. The pixel arrangement of claim 1, wherein the first organic emissive stack comprises a plurality of organic emissive layers.

8. The pixel arrangement of claim 1, wherein the arrangement includes LEDs of only the first color.

9. The pixel arrangement of claim 1, wherein:

the first sub-pixel comprises at least four LEDs configured to emit the first color, a first and a second of the at least four LEDs are electrically connected in parallel with each other,

a third and a fourth of the at least four LEDs are electrically connected in parallel with each other, and

the arrangement of the third and fourth LEDs is electrically connected to the first and second LEDs in series.

10. The pixel arrangement of claim 1, wherein the LED is in a stack with a third portion of the first organic emissive stack.

11. The pixel arrangement of claim 1, further comprising a fourth sub-pixel configured to emit a fourth color different from the initial color, the fourth sub-pixel comprising:

a third portion of the first organic emissive stack; and

a second color altering layer disposed in a stack with the third portion of the first organic emissive stack.

12. The pixel arrangement of claim 1, wherein each of the plurality of pixels comprises sub-pixels of at least four colors.

13. The pixel arrangement of claim 1, wherein each sub-pixel containing one or more LEDs is a sub-pixel of at least two of the plurality of pixels.

14. The pixel arrangement of claim 1, wherein the resolution of sub-pixels containing one or more LEDs in the arrangement is less than the pixel resolution of the arrangement.

15. The pixel arrangement of claim 1, further comprising:

a first backplane configured to drive the first sub-pixel; and

a second backplane configured to drive each of the second and third sub-pixels;

wherein the first backplane is a passive matrix backplane and the second backplane is an active matrix backplane.

16. The pixel arrangement of claim 1, further comprising:

a first backplane configured to drive the first sub-pixel; and

a second backplane configured to drive each of the second and third sub-pixels;

wherein each of the first and second backplanes is a passive matrix backplane.

17. The pixel arrangement of claim 1, wherein the first sub-pixel is disposed on a first substrate, and each of the second and third sub-pixels is disposed on a second substrate.

18. The pixel arrangement of claim 1, wherein the arrangement requires not more than 10 mW/cm² to achieve a luminance of at least 700 cd/m2 at a display white point of a display in which the arrangement is disposed.

19. The pixel arrangement of claim 1, wherein the arrangement has a LT95 expected lifetime of at least 20,000 hours when operating in a display operating at a luminance of at least 1,000 cd/m².

20. The pixel arrangement of claim 1, wherein the arrangement is capable of operating at a peak display luminance of at least 2000 cd/m².

21. A full-color pixel arrangement for a light emitting device, the arrangement comprising a plurality of pixels, each pixel of the plurality of pixels comprising:

a first sub-pixel configured to emit a first color, the first sub-pixel comprising a plurality of inorganic LEDs electrically connected to one another in parallel; and

a second sub-pixel configured to emit a second color, different from the first color, the second sub-pixel comprising an OLED;

wherein each pixel of the plurality of pixels comprises a single sub-pixel comprising one or more inorganic LEDs.