Patent ID: 7548018

Claim:
An electron emission device comprising: first and second substrates facing each other and having a vacuum space interposed therebetween; an electron emission array formed on the first substrate to emit electrons toward the second substrate; a plurality of phosphor layers formed on the second substrate; an anode electrode formed on a surface of the phosphor layers and receiving a voltage required for accelerating electron beams from the electron emission array; and a grid electrode disposed between the first and second substrates, the grid electrode being closer to the second substrate than to the first substrate, the grid electrode having a plurality of electron beam passage holes, and receiving a voltage lower than a location reference voltage at the location of the grid electrode due to a voltage applied to the electron emission array and the voltage applied to the anode electrode, wherein the grid electrode has a plurality of electron beam passage holes for each of a plurality of electron emission regions of the electron emission array, and wherein the grid electrode satisfies the following condition: d≦3t where d indicates a distance between the grid electrode and the anode electrode, and t indicates a thickness of the grid electrode.