Display drive circuit and method, LED display board and display device
US12039915B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 2020 |
| Grant date | Jul 16, 2024 |
| Priority date | — |
| Expiry date | Jul 29, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/121
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The display drive circuit includes: an interface circuit for acquiring a plurality of grayscale data and a plurality of current gain data; a command processing circuit electrically coupled with the interface circuit; a cache circuit electrically coupled with the interface circuit and configured for caching the plurality of grayscale data and the plurality of current gain data; a current source circuit electrically coupled with the command processing circuit and including a plurality of channel current sources; a channel grayscale control circuit, electrically coupled with the command processing circuit, the cache circuit and the current source circuit, and configured for respectively controlling duration of turning on of the plurality of channel current sources according to the plurality of grayscale data; and a channel current control circuit electrically coupled with the cache circuit and the current source circuit, and configured for respectively controlling output currents of the plurality of channel current sources.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.