Pixel units comprising a compensation circuit and electroluminescent display comprising the pixel units
US10210790B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 23, 2017 |
| Grant date | Feb 19, 2019 |
| Priority date | — |
| Expiry date | Jun 5, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K59/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electroluminescent display includes an array of pixels, each including a capacitor, an electroluminescent (EL) device, a first group of transistors and a second group of transistors. The first group of transistors, coupled between a first terminal of the capacitor and a data input, provides a compensation voltage according to data received at the data input. The compensation voltage is composed of a threshold voltage of each of the first group of transistors. The second group of transistors passes a current through the EL device that has a magnitude independent of a threshold voltage of the second group of transistors. In a first phase, a voltage level at the first terminal of the capacitor is reset. In a second phase, data is stored in the capacitor and received via the first group of transistors, and the compensation voltage is generated. In a third phase, the current is passed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.