Patent ID: 7876058

Claim:
An information handling system, comprising: a transmissive display panel; multiple backlight lamps configured to light said transmissive display panel; inverter circuitry configured to convert DC current to AC current, said inverter circuitry comprising a first transformer coupled to provide said AC current to a first one of said multiple backlight lamps and a second transformer coupled to provide said AC current to a second one of said multiple backlight lamps; and at least one processor configured to control said inverter circuitry to cause said first transformer of said inverter circuitry to provide AC current to drive said first one of said multiple backlight lamps in a manner that is independent of AC current provided by said second transformer of said inverter circuitry to drive said second one of said multiple backlight lamps so as to selectably light only said first one of said multiple backlight lamps while not lighting said second one of said multiple backlight lamps, and so as to selectably drive said first one of said multiple backlight lamps to be a different brightness level than said second one of said multiple backlight lamps.