http://en.wikipedia.org/wiki/Digital_signage
Light source carrying device
Calibration system
Light guide plate
Lens-adjusting module
Button device/display apparatus
Dual lamp illumination
http://en.wikipedia.org/wiki/Display_device
Illumination system
http://en.wikipedia.org/wiki/Projection_screen
http://en.wikipedia.org/wiki/Backlight
Brightness enhancement film
Projector
http://en.wikipedia.org/wiki/Heat_sink
Electric screen
Projecting device
Backlight
Projection apparatus
Optical projection apparatus
