Backlight control signal duty cycle extension scheme to avoid flicker
US11436995B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2020 |
| Grant date | Sep 6, 2022 |
| Priority date | — |
| Expiry date | Jul 14, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Certain aspects are directed to a circuit for brightness control. The circuit generally includes: a duty cycle adjustment circuit configured to receive a first backlight control signal having a first duty cycle and generate a second backlight control signal having a second duty cycle, the second duty cycle being greater than the first duty cycle if the first duty cycle is less than a threshold; a digital processor configured to set a value of a software brightness code based on the second duty cycle; and a backlight control circuit configured to drive a backlight in accordance with the software brightness code and the second duty cycle of the second backlight control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.