(Image credit: LG Display) LG Display (LGD) is the arm of LG that manufactures monitor and TV panels for its parent firm, as well as a great deal of other players including Apple, Dell , Sony , and Asus among many others. The company has just announced that its large-format OLED panels earned an Intertek certification for "perfect" color and brightness accuracy under ambient lighting up to 500 lux. Large-format panels are those going into TVs, generally meaning size 48" or larger. We're taking LG Display at its word, as the press release states the certification means the TVs "accurately reproduce both color and brightness regardless of viewing conditions or content." 500 lux of ambient is actually a pretty demanding viewing environment for a TV, as it's roughly the equivalent to a well-lit office, conference room, or kitchen work surface.…