LED backlight modulation method based on duty cycle reference point setting
US11908397B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 31, 2023 |
| Grant date | Feb 20, 2024 |
| Priority date | — |
| Expiry date | Jul 31, 2043 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A light-emitting diode (LED) backlight modulation method based on duty cycle reference point setting is provided, and the LED backlight modulation method is applied to an LED backlight control circuit with row and column scan lines. Different duty cycle reference points are set for the LED string channels in the LED backlight control circuit in row-column scanning mode, whereby the LED string channels can be turned on or off at different time points during a turn-on duration of the row scan line to achieve lighting in the duty cycle, so as to realize the staggered setting of the turn-on time point and turn-off time point of each channel and avoid the need for large current jump at a power drive terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.