Patent · US Active

Stacked OLED microdisplay with low-voltage silicon backplane

US12249278B2 · kind B2 · utility

0Cited by

24References

19Claims

0Family size

Assignees

OLEDWORKS GMBH · DE
Fraunhofer-Gesellschaft e.V. · DE

Inventors

John W. Hamer · Rochester, US
Marina E. Kondakova · Kendall, US
Jeffrey Spindler · Ridgecrest, US
Bernd Richter · Dresden, DE
Philipp Wartenberg · Dresden, DE
Gerd Bunk · Dresden, DE
Uwe Vogel · Munich, DE

Key dates

Filing date	Jan 26, 2021
Grant date	Mar 11, 2025
Priority date	—
Expiry date	May 15, 2042

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02E10/549
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A microdisplay comprising a light emitting OLED stack on top of a silicon-based backplane with individually addressable pixels and control circuitry wherein the light emitting OLED stack has three or more OLED units between a top electrode and a bottom electrode; and the control circuitry of the silicon-based backplane comprises at least two transistors with their channels connected in series between an external power source VDD, and the bottom electrode of the OLED stack. The light-emitting OLED stack preferably has a Vth of at least 7.5V or more. The control circuit can include a protection circuit comprised of a p-n diode, preferably a bipolar junction transistor.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.