Current-mode direct-drive inverter

Details Current-mode direct-drive inverter Current-mode direct-drive inverter

2007-09-04

2007-09-04

Philogene, Haissa (Department: 2821)

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Transformer in the supply circuit

C315S279000, C315S276000, C315S2090SC, C315S219000, C315S291000, C315S224000

Reexamination Certificate

active

11011760

ABSTRACT:
An efficient and flexible current-mode driver delivers power to one or more light sources in a backlight system. In one application, the current-mode driver is configured as an inverter with an input current regulator, a non-resonant polarity-switching network, and a closely-coupled output transformer. The input current regulator can output a regulated current source in a variety of programmable wave shapes. The current-mode driver may further include a rectifier circuit and a second polarity-switching network between the closely-coupled output transformer and a lamp load. In another application, the current-mode driver delivers power to a plurality of light sources in substantially one polarity by providing a regulated current to a network of time-sharing semiconductor switches coupled in series with different light sources coupled across each semiconductor switch.

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