Abstract:
The display device has an electrically conductive phosphorcoated transparent screen, a panel element disposed in close parallel relation to the screen with the panel having an array of electron emitting regions on a semiconductor plate, each controlled by an adjacent memory cell in the plate. An enclosure which includes the screen surrounds the panel. An electric potential is established between the screen and the panel, and a vacuum produced in the enclosure. Preferably, the memory cells associated with the electron emitting regions are storage elements of a shift register which extend throughout the entire array of electron emitters. A binary signal is introduced into the shift register which is used to establish a predetermined pattern of electron emitting regions on the semiconductor panel. This produces a display on the spaced transparent screen when the emitted electrons strike the phosphor on the screen.
Abstract:
Device for generating X-rays, comprising: a field emission cathode (10) configured to emit electrons when an electrical field is applied to the cathode (10); and an anode (20), the anode being configured to generate X-rays as a result of receiving electrons from the field emission cathode (10); wherein the cathode (10) comprises an electron emission surface (S) extending opposite the anode (20), the cathode (10) being configured to emit electrons substantially from the electron emission surface (S) during use.
Abstract:
Device for generating X-rays, comprising: —a field emission cathode (10) configured to emit electrons when an electrical field is applied to the cathode (10); and—an anode (20), the anode being configured to generate X-rays as a result of receiving electrons from the field emission cathode (10); wherein the cathode (10) comprises an electron emission surface (S) extending opposite the anode (20), the cathode (10) being configured to emit electrons substantially from the electron emission surface (S) during use.
Abstract:
A discharge light-emitting device includes an outer envelope filled with discharge gas and a pair of electrodes contained in the outer envelope is provided. At least one of the electrodes includes an electrically conductive substrate, an n-type semiconductor layer provided on the substrate, and a p-type diamond layer provided on the n-type semiconductor layer.
Abstract:
An electron source includes a planar emission region for generating an electron emission, and a focusing structure for focusing the electron emission into an electron beam.
Abstract:
An electron source includes a planar emission region for generating an electron emission, and a focusing structure for focusing the electron emission into an electron beam.
Abstract:
An electron-beam controller (EBC) capable of controlling the power in an electron-beam is disclosed. The EBC can be implemented with an emitter, an extractor, a current mirror, and an input current having a magnitude responsive to the desired electron beam current. An EBC suited for low-efficiency emitters is also disclosed. A method for controlling the power intensity of an electron-beam over time is also disclosed. The method includes the steps of: (1) providing an emitter at a first voltage, (2) providing a target at a second voltage, (3) introducing an extractor at a controllable third voltage, (4) estimating the actual electron beam energy by sensing the emitter current; and (5) adjusting the third voltage in response to the sensed emitter current.
Abstract:
The disclosed microcomponent has a surface oxidated type of Si substrate, at least one cathode with caesiated surface made of n type monocrystalline Si being formed on this substrate. It is surrounded by monocrystalline p tyep Si. A layer of SiO.sub.2, formed on the p type Si, has an aperture facing the cathode. This aperture is self-sealed by the anode material.