FIELD EMISSION CATHODE DEVICE AND DRIVING METHOD

摘要

A driving method includes providing a field emission cathode device. The field emission cathode device includes a cathode electrode, an electron emission layer electrically connected to the cathode electrode, a first gate electrode spaced from the cathode electrode by a first dielectric layer, and a second grid electrode spaced from the first gate electrode by a second dielectric layer. The second dielectric layer has a second opening. A first voltage is supplied to the cathode electrode, a second voltage is supplied to the first gate electrode, and a third voltage is supplied to the second grid electrode, to extract electrons from the electron emission layer to a space formed by the second opening, until the electrons of the space saturate. The third voltage is greater than the second voltage, such that the electrons of the space are emitted through the second grid electrode.

主权项

1. A field emission cathode device, comprising:
an insulating substrate; a cathode electrode located on a surface of the insulating substrate; a first dielectric layer located on a surface of the cathode electrode or the surface of the insulating substrate, wherein the first dielectric layer defines a first opening such that part of the cathode electrode is exposed; an electron emission layer located on the surface of the cathode electrode and electrically connected to the cathode electrode, wherein the surface of the cathode electrode is exposed through the first opening; a first gate electrode located on a surface of the first dielectric layer; a second dielectric layer located on a surface of the first gate electrode and defined a second opening, a part of the cathode electrode is exposed; and a second grid electrode extending from the second dielectric layer and opposite to the electron emission layer, wherein the second grid electrode covers the second opening.