Method and apparatus for reducing LED panel inter-channel interference
US11232742B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2021 |
| Grant date | Jan 25, 2022 |
| Priority date | — |
| Expiry date | Mar 16, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/025
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An LED display system includes a driver chip and an LED array having m scan lines, n channels, and m scan switches. The driver chip includes an analog circuit and a digital controller that controls the analog circuit. The analog circuit has a plurality of power sources that are electrically connected to the LED array and provide a plurality of driving currents to the n channels of LEDs. Further, the n channels are divided into p groups and each group has q channels, p is an integer of 2 to n. Channels in each of the p groups receive a plurality of PWM signals. The starting times of the input PWM signals to at least two different groups among the p groups are different. Further, PMW signals to the channels in the same group may have a same starting time or may have different starting times.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.