HUD used on Boeing 737NG
Looks like the Rockwell Collins HGS (Heads-up Guidance System). According to their brochure, this is a raster system. They aren't clear on the projector technology beyond this. But the example views all seem to show monochrome green. Even the terrain view examples. This makes me think its CRT technology. Old school.
The state of the art for high contrast, high brightness projector display is DLP (digital light processor) technology. This is 'light source agnostic' in that one can put an HID lamp (with color wheel) LEDs solid state l@sers, etc. behind the light gate. And they can be made pretty small. A system that can be used in a lighted conference room is about the size of a hardback book (well, maybe War and Peace).