Hybrid display

Patent metadata

Field	Value
Publication number	US-2018166512-A1
Application number	US-201715812229-A
Country	US
Kind code	A1
Filing date	Nov 14, 2017
Priority date	Sep 18, 2015
Publication date	Jun 14, 2018
Grant date	—

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 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.

First claim

1 . A pixel arrangement for a full-color display, the arrangement 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 single data driver configured to provide luminance information to each of the first sub-pixel and the second sub-pixel.

2 . The pixel arrangement of claim 1 , wherein the second sub-pixel comprises a green OLED having first CIE coordinates, and further comprising:
a third sub-pixel comprising red OLED having second CIE coordinates; and a fourth sub-pixel comprising a yellow OLED having third CIE coordinates; wherein the third CIE coordinates lie to the right of a line between the first CIE coordinates and the second CIE coordinates on the 1931 CIE color chart.

3 . The pixel arrangement of claim 1 , wherein the data driver provides a voltage V dd corresponding to a required overall luminance for the first sub-pixel.

4 . The pixel arrangement of claim 3 , wherein the voltage is converted into a time for which the LED is driven at a constant current.

5 . The pixel arrangement of claim 4 , wherein the constant current I is set by a resistor having resistance R and a driver saturation voltage V sat such that I=(V dd −V sat −V LED )/R.

6 . A hybrid display comprising a plurality of pixels, each of the plurality of pixels comprising:
an inorganic blue LED; a green OLED having first CIE coordinates; a red OLED having second CIE coordinates; and a yellow OLED having CIE coordinates that lie to the right of a line between the first CIE coordinates and the second CIE coordinates on the 1931 CIE color chart.

7 . The hybrid display of claim 6 , wherein the yellow OLED has a dominant spectral distribution in the range of 550 nm-580 nm.

8 . The hybrid display of claim 7 , wherein the green OLED has a dominant spectral distribution in the range of 510 nm-525 nm.

9 . The hybrid display of claim 8 , wherein the blue LED has a dominant spectral distribution in the range of 450 nm-455 nm.

10 . The hybrid display of claim 8 , wherein the red OLED has a dominant spectral distribution in the range of 620 nm-625 nm.

11 - 18 . (canceled)

19 . A hybrid display having a display resolution, the display comprising:
a substrate; and a plurality of pixels disposed over the substrate, each of the plurality of pixels comprising:
a red sub-pixel having a red organic emissive layer;
a green sub-pixel having a green organic emissive layer and disposed adjacent to, and non-overlapping with, the red emissive layer; and
an inorganic blue LED sub-pixel disposed in a plane above or below the red and green sub-pixels.

20 . The hybrid display of claim 19 , wherein the red and green emissive layers are arranged in a geometry corresponding to a deposition mask having a resolution of not more than one-half of the display resolution.

21 . The hybrid display of claim 19 , wherein each blue LED sub-pixel is shared among multiple pixels of the plurality of pixels.

22 . The hybrid display of claim 21 , wherein each blue LED sub-pixel is shared among up to 64 pixels of the plurality of pixels.

Assignees

• Universal Display Corp

Inventors

• Hack Michael
• Weaver Michael Stuart
• Mayweather Iii William T
• Brown Julia J
• Thompson Nicholas J

Classifications

• H01L27/3213

  Electricity · mapped topic

• H01L27/3225 Primary

  Electricity · mapped topic

• H10K59/70

  OLEDs integrated with inorganic light-emitting elements, e.g. with inorganic electroluminescent elements · CPC title

• H10K59/00

  Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00 · CPC title

• H10K59/351 Primary

  comprising more than three subpixels, e.g. red-green-blue-white [RGBW] · CPC title