The specifics vary from one model to the next. Most laser projectors use an RGB system, with three lasers in the three primary colors. These lasers reflect off a chip covered in tiny mirrors that adjust to turn the image into what’s projected on the screen. That reflected light is then magnified and focused by the lens before heading out to shine on your screen or wall.   The main benefit of this is less wasted light. With a traditional bulb-based projector, the light is white and shines through a color wheel to filter it into colors. As a result, more than half of the light produced is wasted, and some people may see flickering in the image. This is why RGB laser projectors are more efficient and produce a more stable image than lamp-based models.