Pixel circuit with threshold voltage compensation
US11322087B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 2021 |
| Grant date | May 3, 2022 |
| Priority date | — |
| Expiry date | Apr 22, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A pixel circuit for a display device may be operable in three phases, including an initialization phase, a combined threshold compensation and data programming phase, and an emission phase. The pixel circuit may include a drive transistor configured to control an amount of current from a first power supply to a light-emitting device during the emission phase depending upon a voltage applied to a gate of the drive transistor. The pixel circuit may also include a second transistor and a third transistor that are connected in series between the gate and a second terminal of the drive transistor and are configured to implement the three phases. The pixel circuit may also include two capacitors, with one capacitor connected between the gate of the drive transistor and a first node of the circuit, and another capacitor connected between the gate and a second node of the circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.