Optical sensing module
Lens shifting device
http://en.wikipedia.org/wiki/Backlight
Angle adjusting mechanism
Lamp holder
Film tensioning device
Lens adjusting device
http://en.wikipedia.org/wiki/Projection_screen
Locking device for lens
Light guide plate
http://en.wikipedia.org/wiki/Display_device
Lens assembling
http://en.wikipedia.org/wiki/Flat_panel_display
http://en.wikipedia.org/wiki/Liquid-crystal_display
Brightness control device
