Field emission unit and field emission pixel tube
A technology of field emission and pixel tubes, which is applied in the direction of image/graphic display tubes, cathode ray tubes/electron beam tubes, screen tubes, etc., can solve the problems of poor heat dissipation and insufficient electron emission ability of electron emitters, and improve the efficiency of electron emission. Emission capability, reduced shielding effect, and improved mechanical strength
Active Publication Date: 2011-04-20
TSINGHUA UNIV +1
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[0003] However, the existing field emission units and field emission pixel tubes use carbon nanotube wires or aggregated carbon nanotubes as electron emitters, and the carbon nanotubes in the electron emitters as electron emission sources are gathered together to dissipate heat during work. Bad, and there is an electric field shielding effect between adjacent carbon nanotubes, so the electron emission ability of the electron emitter is not good enough
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[0054] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0055] see figure 1 , the first embodiment of the present invention provides a field emission pixel tube 100, the field emission pixel tube 100 includes a housing 102 and a field emission unit (not shown), the field emission unit is located in the housing 102 , the casing 102 provides a vacuum space for the field emission unit.
[0056]The field emission unit includes a cathode 104 , a phosphor layer 110 , an anode 112 , a cathode lead 116 and an anode lead 114 . The cathode 104 is opposite to the anode 112 and arranged at intervals, the cathode lead 116 is electrically connected to the cathode 104, the anode lead 114 is electrically connected to the anode 112, the cathode 104 can emit electrons, and the electrons emitted by it The electric field generated between the cathode 104 and the anode 112 reaches the phosphor layer 110 and bombards the phosphor in ...
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The invention relates to a field emission unit and a field emission pixel tube. The field emission pixel tube comprises a shell and a field emission unit, wherein the field emission unit is arranged in the shell; the field emission unit comprises at least three anodes, a fluorescent powder layer respectively arranged on the surfaces of the at least three anodes, and a cathode; the cathode and the anodes are alternatively arranged; the cathode comprises a cathode supporter and at least three electron emitters; the at least three electron emitters are corresponded to the at least three anodes one by one; each electron emitter comprises a carbon nanometer tube structure; one end of the carbon nanometer tube structure is electrically connected to the cathode supporter while the other end is extended towards the anode as the electron emitting end; the carbon nanometer tube structure is formed by enclosing a hollow linear axis by a plurality of carbon nanometer tubes; and a plurality of electron emitting tips are formed on the electron emitting end of the carbon nanometer tube structure.
Description
technical field [0001] The invention relates to a field emission unit and a field emission pixel tube. Background technique [0002] Carbon Nanotube (CNT) is a new type of carbon material, which was discovered by Japanese researcher Iijima in 1991, please refer to "Helical Microtubules of Graphitic Carbon", S.Iijima, Nature, vol.354, p56 (1991) . Carbon nanotubes have a large aspect ratio (the length is above the micron level, and the diameter is only a few nanometers or tens of nanometers), has good electrical and thermal conductivity, and also has good mechanical strength and good chemical properties. Stability, these characteristics make carbon nanotubes an excellent field emission material. Therefore, the application of carbon nanotubes in field emission devices has become a research hotspot in the field of nanotechnology. [0003] However, the existing field emission units and field emission pixel tubes use carbon nanotube wires or aggregated carbon nanotubes as elec...
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IPC IPC(8): H01J31/10H01J29/04
CPCH01J2201/30469H01J1/304H01J31/12H01J29/04
Inventor 魏洋范守善
Owner TSINGHUA UNIV