Driver for backlight unit
US8350492B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 27, 2009 |
| Grant date | Jan 8, 2013 |
| Priority date | — |
| Expiry date | Aug 25, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0233
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A backlight unit, with a parallel configuration of plural lamps, having improved reliability is disclosed. The backlight unit driver includes: first and second lamps connected parallel to each other; a DC/AC inversion portion inverting a DC voltage into an AC voltage to apply the AC voltage to the lamps; a transformer transforming the AC voltage from the DC/AC inversion portion; a positive polarity AC signal compensator compensating an electric current difference between the first and second lamps using positive polarity AC signals from the first and second lamps; and a negative polarity AC signal compensator compensating the electric current difference between the first and second lamps using negative polarity AC signals from the first and second lamps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.