Optical assembly
Fixture device
Adjusting apparatus
Light cut
Cooling apparatus
http://en.wikipedia.org/wiki/Polarizer
http://en.wikipedia.org/wiki/Backlight
Backlight button
Rear projection display
Elevating module
Lighting apparatus
Illumination system
http://en.wikipedia.org/wiki/Lamp
Sliding lens cap
Projection system
Elevating mechanism
