Hybrid IGZO pixel architecture
US11574586B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 2022 |
| Grant date | Feb 7, 2023 |
| Priority date | — |
| Expiry date | Apr 11, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/84
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display device includes a silicon wafer including digital circuits, a micro-light emitting diode (micro-LED) wafer including an array of micro-LEDs, and an indium-gallium-zinc-oxide (IGZO) layer between the silicon wafer and the micro-LED wafer and including analog circuits. The digital circuits are characterized by a first operating supply voltage and are configured to generate digital control signals based on digital display data of an image frame. The analog circuits are characterized by a second operating supply voltage higher than the first operating supply voltage. The analog circuits includes analog storage devices configured to storing analog signals, and transistors controlled by the digital control signals and the analog signals to generate drive currents for driving the array of micro-LEDs. The digital circuits on the silicon wafer or the analog circuits in the IGZO layer include level-shifting circuits at interfaces between the digital circuits and the analog circuits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.