Electrical appliance having a lighting device having light emitting diodes
US8624520B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 2, 2011 |
| Grant date | Jan 7, 2014 |
| Priority date | — |
| Expiry date | Jan 26, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrical appliance, particularly a television or a monitor, having a lighting device (8) having light emitting diodes (12). The light emitting diodes (LED) (12) are collected in LED strings (11) and controlled by a balancing network (17). The balancing network (17) has a circuit branch (19) for each string (11), the circuit branches (19) being connected in parallel to each other. Disposed in each circuit branch (19), is a bridge rectifier (20) to which the LED string (11) is connected. Moreover, each circuit branch has a balancing transformer (23), wherein all the secondary windings (26) of the balancing transformer (23) are connected in series in a closed conductor loop (27), by which the currents in all circuit branches are balanced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.