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US 2008/0290782 A1Published application
Field emission display having an improved emitter structure
OwnerTae-Sik Ohinventor
Life of this patent
Estimating the term…
Abstract
A field emission display (FED) is provided. The FED has an emitter structure where the emitter, a conductor and a cathode electrode are so arranged to produce a certain electric field about the emitter. The electric field about the emitter causes the electron beam emitted from the emitter to have improved focus and have less dispersion. This causes the electron beam to hit the intended pixel without exciting phosphor layers in neighboring pixels, thus improving image quality.
Claims31
1-55. (canceled)
A field emission display (FED), comprising:
- a first substrate;
- a cathode electrode arranged on the first substrate;
- a conductive layer arranged on the cathode electrode, the conductive layer being perforated by a first aperture exposing an exposed portion of the cathode electrode;
- an insulation layer arranged on the conductive layer and being perforated by a second aperture that is arranged over and adjacent to the first aperture;
- a gate electrode arranged on the insulation layer and being perforated by a third aperture that is arranged over and adjacent to the second aperture;
- emitters arranged on the exposed portion of the cathode electrode, with the emitters being arranged a predetermined distance apart from each other at either side of the first aperture, and a cavity being formed perforating the cathode electrode between the emitters exposing a portion of the first substrate;
- and
- a second substrate arranged to face the first substrate with a predetermined distance therebetween, with the second substrate having an anode electrode and a fluorescent layer arranged thereon, the first, second, and third apertures and the cavity are rectangles extending parallel to and coextensive with a longitudinal direction of the cathode electrode, a width of the third aperture and a width of the second aperture each being larger than a width of the first aperture, and a width of the cavity being smaller than the width of the first aperture.
5 more elements
A field emission display (FED), comprising:
- a first substrate;
- a cathode electrode arranged on the first substrate;
- an insulation material layer arranged on the cathode electrode;
- a conductive layer arranged on the insulation material layer;
- a first aperture perforating the insulation material layer and the conductive layer exposing an exposed portion of the cathode electrode;
- an insulation layer arranged on the conductive layer and being perforated by a second aperture that is connected to the first aperture;
- a gate electrode arranged on the insulation layer and perforated by a third aperture that is connected to the second aperture;
- emitters arranged on the exposed portion of the cathode electrode, the emitters being arranged at both sides of the first aperture so that the emitters are spaced a predetermined distance apart from each other;
- and
- a second substrate arranged to face the first substrate with a predetermined distance therebetween, an anode electrode and a fluorescent layer being arranged on the second substrate.
7 more elements
Dependencies are inferred from the claim text.