Patent ID: 7569986

Claim:
An electron emission display comprising: a first substrate; a second substrate facing the first substrate to form a vacuum envelope; a plurality of driving electrodes formed on the first substrate; a plurality of electron emission regions controlled by the driving electrodes; a focusing electrode disposed on and insulated from the driving electrodes and provided with a plurality of first openings through which electron beams pass; a plurality of phosphor layers formed on a surface of the second substrate; an anode electrode formed on surfaces of the phosphor layers; and a plurality of spacers for maintaining a gap between the first and second substrates, wherein the focusing electrode comprises a potential control unit for forming a potential well to compensate for distortion of the electron beams caused when electric charges are accumulated on the spacers, the potential control unit being formed by removing a portion of the focusing electrode to expose a top surface of an underlying insulation layer contacting the focusing electrode, and positioned between at least two of the first openings to correspond to the spacers such that the potential control unit is configured to form an electric field for countering an effect on the electron beams of an electric field from the electric charges accumulated on the spacers.