Patent ID: 7274139
Filing Date: 2007-09-25
Classification: H01J

Abstract:
1. An electron emission device comprising: a first substrate and a second substrate facing each other at a predetermined distance; cathode electrodes and gate electrodes formed on the first substrate and crossing each other with an insulation layer interposed between the cathode electrodes and the gate electrodes; opening portions formed at the gate electrodes and at the insulation layer exposing the cathode electrodes; electron emission sources formed on cathode electrodes exposed through the opening portions, each electron emission source having an area smaller than an area of each opening portion; an anode electrode formed on the second substrate; and phosphor layers formed on the anode electrode, each phosphor layer having a phosphor layer length extending in a first direction and a phosphor layer width extending in a second direction, the phosphor layer length being greater than the phosphor layer width; wherein the electron emission sources satisfy the following condition: where “a” indicates a distance between each electron emission source and a respective gate electrode in the first direction, and “b” indicates a distance between each electron emission source and the respective gate electrode in the second direction.