Patent ID: 8159120

Claim:
A pixel tube for a field emission device, comprising: a sealed container having a light permeable portion and a bottom; a phosphor layer formed on the light permeable portion in the sealed container; an anode electrode formed on the phosphor layer; a cathode electrode arranged in the sealed container and facing the light permeable portion; a carbon nanotube yarn attached to the cathode electrode and extending toward the light permeable portion for emitting electrons therefrom; an electrically conductive shielding enclosure arranged in the sealed container, the enclosure including a top wall and a peripheral wall extending from an edge of the top wall, the peripheral wall surrounding the carbon nanotube yarn therein, the top wall defining an opening therein; and a dielectric member filled between the cathode and the peripheral wall of the enclosure, the dielectric member contacting with the peripheral wall of the shielding enclosure, and wherein the cathode electrode extends through the dielectric member toward the anode electrode, and the dielectric member is located entirely in the enclosure; wherein the peripheral wall of the enclosure is electrically connected to a connector running from an inside to an outside of the sealed container, and the shielding enclosure is fixed on the bottom of the sealed container via the connector.