Inverter circuit for lighting backlight of liquid crystal...

Details Inverter circuit for lighting backlight of liquid crystal... Inverter circuit for lighting backlight of liquid crystal...

2005-05-18

2008-03-18

Philogene, Haissa (Department: 2821)

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

C315S276000, C315S291000, C315S307000, C345S102000

Reexamination Certificate

active

07345432

ABSTRACT:
A separately-excited inverter circuit includes: an oscillator which generates a high-frequency voltage pulse by mixing a high-frequency voltage pulse of a first frequency and a high-frequency voltage pulse of a second frequency different from the first frequency; and a transformer drive part which buffers an output signal of this oscillator, and inputs the signal to a primary side of a transformer. The inverter circuit includes a capacitor which is connected in parallel with an output of a secondary side of the transformer. When used for lighting the backlight of a liquid crystal display, the present invention can improve the lighting characteristics of the backlight with a long cold-cathode tube.

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