Patent ID: 8294354

Claim:
A field emission light source device, comprising: a base substrate; at least one cathode strip, disposed over the base substrate; at least one emissive protrusion, disposed over and electrically connected to the at least one cathode strip; an insulating layer, disposed over the at least one cathode strip and having at least one opening to allow the at least one emissive protrusion to protrude out of the at least one opening; at least one anode strip, disposed over the insulating layer and having at least one impacted surface corresponding to the at least one emissive protrusion, wherein the at least one cathode strip and the at least one anode strip are electrically separated from each other by the insulating layer and arranged into a m×n matrix, therewith each of m and n being an integer of 1 or more, and the at least one impacted surface is an inclined surface or a curved surface; and a phosphor layer, disposed over the at least one impacted surface, wherein the at least one cathode strip, the at least one emissive protrusion, the insulating layer, the at least one anode strip and the phosphor layer are placed at the base substrate.