Abstract:
A field emission device for use as a backlight of a liquid crystal display comprises a conductive anode having a light-emitting layer and a cathode separated from the anode by a spacer. The cathode comprises nanofiber electron emitters. For example, the nanofiber electron emitters comprise a substrate, a conductive film adhered to the substrate and a plurality of isolated, hemispheroidal nanofiber clusters that are capable of emitting electrons at high current density and low field strength.
Abstract:
To create a field electron emission material, there is printed upon a substrate (1501) an ink (1503) comprising a major component of fluid vehicle; a first minor component of electrically insulating material, either on its own or provided within a precursor therefor; and a second minor component of electrically conductive particles (1504). The printed ink is then treated to expel the major component and create the field electron emission material from the minor components on the substrate. The electrically conductive particles may be omitted, to print a solid, electrically insulating layer in a field emission device.
Abstract:
A flat panel display and a method for forming a flat panel display. In one embodiment, the flat panel display includes a cathodic structure which is formed within an active area on a backplate. The cathodic structure includes an emitter electrode metal composed of strips of aluminum overlain by a layer of cladding material. The use of aluminum and cladding material to form emitter electrode metal gives emitter electrode metal segments which are highly conductive due to the high conductivity of aluminum. By using a suitable cladding material and processing steps, a bond between the aluminum and the cladding material is formed which has good electrical conductivity. In one embodiment, tantalum is used as a cladding material. Tantalum forms a bond with the overlying resistive layer which has good electrical conductivity. Thus, the resulting structure has very high electrical conductivity through the aluminum layer and high conductivity into the resistive layer. Electrode structures that use resistor material, chromium-containing material, nickel and vanadium alloy, and gold are also disclosed.
Abstract:
Electrophoretic deposition provides an efficient process for manufacturing a field emission cathode (10). Particles (19) of an electron emitting material mixed with particles (18) of an insulating material are deposited by electrophoretic deposition on a conducting layer overlying an insulating layer to produce the cathode. By controlling the composition of the deposition bath and by mixing insulating particles (18) with emitting particles (19), an electrophoretic deposition process can be used to efficiently produce field emission cathodes that provide spatially and temporally stable field emission. The deposition bath for the field emission cathode includes an alcohol, a charging salt, water, and a dispersant. The field emission cathodes can be used as an electron source in a field emission source in a field emission display device.
Abstract:
An electron emitting device comprising a first electrode (2) and an electron emitting part (24) provided on the first electrode (2) and constituted of particles or their aggregates (3), the particles (3) containing a carbonaceous material which has a carbon six-membered ring structure and contains, for example, graphite or carbon nanotube as its main component.
Abstract:
A novel field emitter material (13), field emission electron source (2), and commercially feasible fabrication method is described. The inventive field emission electron source produces reliable electron currents of up to 400 mA/cm at 200 volts. The emitter (2) is robust and the current it produces is not sensitive to variability of vacuum or the distance between the emitter tip and the cathode. The novel emitter (2) has a sharp turn-on near 100 volts.
Abstract translation:描述了一种新颖的场致发射体材料(13),场发射电子源(2)和商业上可行的制造方法。 本发明的场发射电子源在200伏特下产生高达400mA / cm 2的可靠的电子电流。 发射极(2)是稳健的,其产生的电流对真空的可变性或发射极尖端和阴极之间的距离不敏感。 新型发射器(2)具有近100伏特的尖锐导通。