Panasonic's DLP system projectors have taken another step forward. Now they produce even better images while maintaining all of their highly reliable functions. Visibility has been improved in rooms with the lights turned on, and durability has been increased with the AC lamp. The PT-D4000U offers 4,000 lumens of Off On brightness, thanks to the developed AC lamp and more efficient reflectors and synthetic mirror. Real-life images are also produced in rooms with the lights turned on. The system daylight view function uses an image processing circuit to compensate for the loss of color saturation that occurs when light reflects onto the screen from bright surroundings. It is especially effective for producing crisp, sharp images in dark portions containing gradation. The function can be adjusted in three steps.