The magic behind keeping the full resolution image lies with the TI SmoothPicture technology that uses the mirror array and optical actuator of a DLP display system to slightly modify the left and right channel frames and then optically offset the grid pattern created in the above diagram. With the high switching speed of the mirrors of the DLP technology all of the original pixels in the image can be displayed with a 8ms field time and thus allowing the display to show 60 effective frames in under a second (8ms x 120 = 960 ms). An added benefit of this offset and displacement method that the DLP technology uses is that the images on the screen are somewhat softened thus lessening edge artifact. Oh, and also, you can get DLPs in sizes up to 73-in; who doesnâ(TM)t want to take on the zombies with that kind of screen?
So DLPs are effectively interlacing pixels instead of scanlines and using an actuator to achieve full resolution. The DLP chip is really outputting 960x1080P / 120Hz, but interlaced together to produce the image at 1920x1080 / 60Hz. The difference of 3D of course is the way each 2 frames interlace (part of same image or split in the way 3D would be).
"Unibus timeout fatal trap program lost sorry" - An error message printed by DEC's RSTS operating system for the PDP-11