Patent ID: 7717601

Claim:
A method of compensating brightness uniformity of display for an information handling system, comprising: providing a transmissive display panel and one or more main backlight lamps configured to provide light to said transmissive display panel; providing one or more auxiliary backlight lamps configured to supplement light provided by said main backlight lamps to light said transmissive display panel; lighting an area of said transmissive display panel with said main backlight lamps; and providing light from said auxiliary backlight lamps to supplement light provided by said main backlight lamps to light said area of said transmissive display panel; wherein said area of said transmissive display panel is lit with a first brightness uniformity by said main backlight lamps alone, said first brightness uniformity being defined as a minimum measured brightness value of multiple brightness points measured across a given area of the transmissive display panel when the transmissive display panel is lit by said main backlight lamps alone divided by a maximum measured brightness value of multiple measured brightness points measured across the given area of the transmissive display panel when the transmissive display panel is lit by said main backlight lamps alone; and wherein said area of said transmissive display panel is lit with a second brightness uniformity by said main backlight lamps and said auxiliary backlight lamps together, said second brightness uniformity being defined as a minimum measured brightness value of multiple brightness points measured across the given area of the transmissive display panel when the transmissive display panel is lit by said main backlight lamps and said auxiliary backlight lamps together divided by a maximum measured brightness value of multiple measured brightness points measured across the given area of the transmissive display panel when the transmissive display panel is lit by said main backlight lamps and said auxiliary backlight lamps together; and wherein said second brightness uniformity is greater than said first brightness uniformity.