Backlight device using a field emission light source

摘要

A backlight device ( 100 ) includes a light source ( 110 ) and a light guiding plate ( 120 ). The light source includes a cathode ( 111 ); a nucleation layer ( 112 ) formed on the cathode; a field emission portion ( 102 ) formed on the nucleation layer; and a light-permeable anode ( 117 ) arranged over the cathode. The field emission portion includes an isolating layer ( 113 ) formed on the cathode; a plurality of isolating posts ( 114 ) disposed on the isolating layer; and a plurality of field emitters ( 115 ) located on the respective isolating posts. The light guiding plate includes an incident surface ( 121 ) facing the light-permeable anode and adapted for receiving light emitted from the light source.