LED backlight matrix driving circuit and driving voltage detection and regulation method therefor
US12236904B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2024 |
| Grant date | Feb 25, 2025 |
| Priority date | — |
| Expiry date | Jun 14, 2044 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An LED backlight driving circuit with a voltage regulating unit is provided. The LED backlight driving circuit includes a power supply unit, an LED string, an ADC voltage detection circuit, and a driving controller; the ADC voltage detection circuit is used to detect a voltage value Vled of a negative terminal of a LED string, and the ADC voltage detection circuit includes an ADC sampling module that converts the measured voltage value Vled at the negative terminal of the LED string into a voltage numerical code; for the numerical code of the negative terminal voltage value Vled measured by the ADC sampling module, a first threshold V1 and a second threshold V2 are set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.