Backlight LED driver circuit with current regulating function
US11847982B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2023 |
| Grant date | Dec 19, 2023 |
| Priority date | — |
| Expiry date | Jul 31, 2043 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/40
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A backlight LED driver circuit with current regulating function is provided. The backlight LED driver circuit includes: a LED light-emitting element, a first transistor, a first amplifier, a current regulator module, and a voltage regulator module; the current regulator module including a plurality of current channels, each including one second transistor and one third transistor; the voltage regulator module including a fourth transistor, a fifth transistor, and a sixth transistor; the fourth transistor, the fifth transistor, and the sixth transistor in the voltage regulator module and the second transistor and one third transistor of each of the current channels in the current regulator module constitute a current mirror; and the current regulator module further including a decoder configured to generate a signal for controlling on and off states of the plurality of second transistors in the plurality of current channels in response to an input digital control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.