Samsung Sdi Co., Inc.

You-Jong Kim

Jong-Min Kim

Sang-Jo Lee

Sung-Ho Jo

Jae-Cheol Cha

An electron emission device includes first and second substrates facing each other with a predetermined distance, cathode electrodes formed on the first substrate, electron emission regions formed on the cathode electrodes, and gate electrodes placed over the cathode electrodes while interposing an insulating layer. The gate electrodes have opening portions exposing the electron emission regions on the first substrate. The electron emission region has a height compensation portion formed on the cathode electrode such that the width of the height compensation portion is reduced in a direction toward the second substrate. An electron emission layer covers the surface of the height compensation portion and contacts the cathode electrode such that the electron emission layer is electrically connected to the cathode electrode.

Electron emission device with improved electron emission structure for increasing emission efficiency and lowering driving voltage

An electron emission device comprises first and second substrates facing each other and separated from each other by a distance. First and second electrodes are positioned on the first substrate such that the first and second electrodes are insulated from each other. Electron emission regions are positioned on the first substrate and are electrically connected to at least one of the first and second electrodes. An insulating layer covers the first and second electrodes. A focusing electrode is positioned on the insulating layer. The focusing electrode includes openings to allow passage of electron beams. The focusing electrode comprises a first layer having a first thickness, a second layer beneath the first layer and a third layer surrounding the first layer. The second and third layers are electrically connected and have second and third thicknesses smaller than the first thickness.

Electron emission device with enhanced focusing electrode structure

A field emission display includes a first substrate; a plurality of gate electrodes formed on the first substrate in a predetermined pattern; an insulation layer formed covering the gate electrodes over an entire surface of the first substrate; a plurality of cathode electrodes formed on the insulation layer in a predetermined pattern, a plurality of emitters formed on the cathode electrodes; a plurality of counter electrodes formed on the insulation layer at a predetermined distance from the emitters and in a state of electrical connection to the gate electrodes, the counter electrodes forming an electric field directed toward the emitters; a second substrate provided at a predetermined distance from the first substrate and sealed in a vacuum state with the first substrate; an anode electrode formed on a surface of the second substrate opposing the first substrate; and a plurality of phosphor layers formed over the anode electrode in a predetermined pattern.

Growing community of inventors

Suwon-si, South Korea

You-Jong Kim