Power-saving function in projection
Light source device
http://en.wikipedia.org/wiki/Centrifugal_fan
Radiating module
http://en.wikipedia.org/wiki/Heat_exchanger
Projection device
Display screen
http://en.wikipedia.org/wiki/Lens_(optics)
Light guide plate
http://en.wikipedia.org/wiki/Optical_film
http://en.wikipedia.org/wiki/Fuel_cell
http://en.wikipedia.org/wiki/Display_device
Turning mechanism for projector
http://en.wikipedia.org/wiki/Digital_micromirror_device
http://en.wikipedia.org/wiki/Backlight
Angle adjusting of a display device
http://en.wikipedia.org/wiki/Memory_card
Backboard reflecting
Photographing management
