Display screen having light-emitting diodes
US11443686B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2018 |
| Grant date | Sep 13, 2022 |
| Priority date | — |
| Expiry date | Dec 6, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/025
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display screen including display circuits, each display circuit including a light-emitting diode, a controllable current source powering the light-emitting diode, and a control circuit capable of supplying a pulse-width modulated signal for controlling the current source from a periodic signal. The display screen further includes first electrodes coupled to the control circuits, a circuit for supplying a selection signal successively on each first electrode, and an oscillating circuit or oscillating circuits capable of supplying the periodic signals, the periodic signals being non-synchronous with the display circuit selection signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.