http://en.wikipedia.org/wiki/List_of_light_sources
http://en.wikipedia.org/wiki/Glass_production
Projecting device
Lens component/projection device
Light source device
Light source module
Touch button device/projector
Device housing
http://en.wikipedia.org/wiki/Backlight
Adjusting device in projecting
Gas filtration module in projecting
Optical switching module
Projection system
http://en.wikipedia.org/wiki/Optical_film
Display device/backlight module
