Field-emitting cathode and plane light source
A Field Emission Cathode, Planar Light Source Technology
Active Publication Date: 2011-01-05
TSINGHUA UNIV
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Problems solved by technology
The degree of vacuum is an important factor determining the stability of field emission. If the degree of vacuum near the carbon nanotube cathode is too low, problems such as ignition, gas ionization, and ion bombardment of the cathode will occur, which will lead to a rapid attenuation of the cathode emission current.
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The field-emissive cathode includes a cathode conductive layer, and an electro emitter formed on the cathode conductive layer. The electro emitter contains Nano carbon tube and getter material. The invention is also related to plane light source of using the said field-emissive cathode. The plane light source includes the said field-emissive cathode and an anode. The anode includes an anodic conductive layer, and a fluorophor layer formed on the anodic conductive layer. The fluorophor layer is faced to the electro emitter. The disclosed plane light source can maintain certain vacuum degree inside plane light source so as to prolong service life of plane light source.
Description
Field emission cathode and planar light source 【Technical field】 The invention relates to a field emission device, in particular to a field emission cathode and a planar light source using the field emission cathode. 【Background technique】 Carbon Nanotube (CarbonNanotube, CNT) is a new type of carbon material, discovered by Japanese researcher Iijima in 1991, please refer to "Helical Microtubules of Graphic Carbon", SIijima, Nature, vol.354, p56 (1991). Carbon nanotubes are one of the best known field emission materials. They have extremely low field emission voltage, can transmit extremely high current density, and the current is extremely stable, so they are very suitable as electron emission sources for field emission electronic devices. At present, the most popular research on carbon nanotubes is the application of flat display, such as the display of characters, graphics and images. In addition, in the field of electric light sources, carbon nanotubes also have poten...
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IPC IPC(8): H01J1/304H01J63/00H01J31/12
CPCH01J61/26H01J61/305B82Y10/00H01J63/06H01J1/304H01J2201/30469H01J31/127
Inventor 郭彩林潜力唐洁刘亮杜秉初胡昭复陈丕瑾范守善
Owner TSINGHUA UNIV