公开(公告)号：US6054801A

公开(公告)日：2000-04-25

申请号：US112080

申请日：1998-07-08

Applicant: Charles E. Hunt ,  Andrei G. Chakhovskoi

Inventor： Charles E. Hunt ,  Andrei G. Chakhovskoi

IPC: H01J1/30 ,  C25B3/00 ,  C25B11/12 ,  H01J1/304 ,  H01J1/13

CPC classification number: H01J1/304 ,  H01J2201/30446

Abstract: A field emission cathode is provided comprising an emissive member formed of a porous foam carbon material. The emissive member has an emissive surface defining a multiplicity of emissive edges.

Abstract translation: 提供场致发射阴极，其包括由多孔泡沫碳材料形成的发射构件。 发射构件具有限定多个发射边缘的发射表面。

公开(公告)号：US5982083A

公开(公告)日：1999-11-09

申请号：US744453

申请日：1996-11-07

Applicant: Gyu-Nam Ju ,  Jong-Seo Choi ,  Keun-Bae Kim ,  Kwang-Min Lee ,  Kwi-Seok Choi ,  Su-Chan Lee ,  Sang-Jin Lee

Inventor： Gyu-Nam Ju ,  Jong-Seo Choi ,  Keun-Bae Kim ,  Kwang-Min Lee ,  Kwi-Seok Choi ,  Su-Chan Lee ,  Sang-Jin Lee

IPC: H01J1/142 ,  H01J1/13

CPC classification number: H01J1/142

Abstract: A cathode for an electron tube includes a layer of a electron emitting substance containing alkaline earth metal oxides containing 0.01--20.0 wt % of both a lanthanum compound and a magnesium compound or a lanthanum-magnesium compound disposed on a base metal including nickel as a major component and tungsten as a minor component. The tungsten prevents embrittlement and ensures a continuing supply of fill barium in the electron-emitting substance. The cathode enjoys full interchangeability with the conventional oxide cathode and a 15-30% longer life span.

Abstract translation: 电子管的阴极包括含有碱土金属氧化物的层，所述碱土金属氧化物含有0.01-20.0重量％的镧化合物和镁化合物，或镧 - 镁化合物，其配置在包含镍作为主要的贱金属 组分和钨作为次要组分。 钨防止脆化并确保在电子发射物质中持续供应填充钡。 阴极与常规氧化物阴极完全互换，寿命长达15-30％。

公开(公告)号：US5977699A

公开(公告)日：1999-11-02

申请号：US5007

申请日：1998-01-09

Applicant: Kyu-nam Joo ,  Jong-seo Choi ,  Soo-chan Lee ,  Deuk-il Park

Inventor： Kyu-nam Joo ,  Jong-seo Choi ,  Soo-chan Lee ,  Deuk-il Park

IPC: H01J1/14 ,  H01J1/13 ,  H01J1/144 ,  H01J1/20 ,  H01J1/26

CPC classification number: H01J1/144

Abstract: A cathode for an electron tube, includes a base metal having nickel as a main component, and an electron emitting material layer containing an alkaline earth metal oxide having barium oxide as a main component, wherein a metal layer having zirconium as a main component is located between the base metal and the electron emitting material layer. The cathode has an excellent initial electron emitting characteristic and can emit a large quantity of electrons for a long time. Therefore, the cathode is suitable for a larger and higher-definition CRT.

Abstract translation: 电子管的阴极包括以镍为主要成分的母材和含有以氧化钡为主要成分的碱土金属氧化物的电子发射材料层，其中以锆为主要成分的金属层位于 在贱金属和电子发射材料层之间。 阴极具有优异的初始电子发射特性，并且可以长时间发射大量的电子。 因此，阴极适用于更大和更高清晰度的CRT。

公开(公告)号：US5810980A

公开(公告)日：1998-09-22

申请号：US744574

申请日：1996-11-06

Applicant: Jonathan Sidney Edelson

Inventor： Jonathan Sidney Edelson

IPC: H01J1/13 ,  H01J1/30 ,  C25B11/00

CPC classification number: H01J1/13 ,  H01J1/30 ,  F25B2321/003

Abstract: A metal surface is coated with a heterocyclic multidentate ligand compound, reducing work function and facilitating the emission of electrons.

Abstract translation: 金属表面涂覆有杂环多齿配体化合物，降低功函数并促进电子的发射。

公开(公告)号：US5185559A

公开(公告)日：1993-02-09

申请号：US593561

申请日：1990-10-09

Applicant: Isamu Shimoda ,  Takeo Tsukamoto ,  Akira Shimizu ,  Akira Suzuki ,  Masao Sugata ,  Masahiko Okunuki

Inventor： Isamu Shimoda ,  Takeo Tsukamoto ,  Akira Shimizu ,  Akira Suzuki ,  Masao Sugata ,  Masahiko Okunuki

IPC: H01J1/13

CPC classification number: H01J1/135

Abstract: An electron emission device is provided in which a drive current for driving an electron emission element is maintained at a constant level. The device comprises a transistor having its base provided with a divided voltage. The electron emission element is responsive to the transistor.

Abstract translation: 提供一种电子发射器件，其中用于驱动电子发射元件的驱动电流保持在恒定水平。 该器件包括其基极设置有分压的晶体管。 电子发射元件响应晶体管。

公开(公告)号：US4816724A

公开(公告)日：1989-03-28

申请号：US27211

申请日：1987-03-17

Applicant: Kiyoshi Hamada ,  Kaoru Tomii ,  Junpei Hashiguchi ,  Kinzo Nonomura

Inventor： Kiyoshi Hamada ,  Kaoru Tomii ,  Junpei Hashiguchi ,  Kinzo Nonomura

IPC: H04N5/68 ,  H01J1/13 ,  H04N9/12 ,  H04N9/26 ,  H01J29/70 ,  H01J29/72

CPC classification number: H01J1/135 ,  H04N9/12

Abstract: During a period in which electron beam emission to a photo-emissive screen is inhibited, a heating current is supplied to a cathode. During a period in which electron beam emission to the screen is enabled, the supply of the heating current to the cathode is interrupted and the potential at the cathode is varied with a video signal. During the beam emission enabling period, the interruption of the heating current supply allows the electron beam to be uniform along the cathode, since the heating current would cause a potential gradient or variation along the cathode. In addition, during the beam emission enabling period, since the cathode potential is varied with the video signal, the electron beam is modulated in accordance with the video signal.

Abstract translation: 在抑制向光发射屏的电子束发射的期间，向阴极供给加热电流。 在使能电子束发射到屏幕的期间，中断向阴极供电的加热电流，阴极电位随视频信号而变化。 在光束发射使能期间，加热电流供应的中断允许电子束沿阴极均匀，因为加热电流将导致沿着阴极的电位梯度或变化。 此外，在光束发射使能期间，由于阴极电位随着视频信号而变化，所以根据视频信号调制电子束。

公开(公告)号：US4686413A

公开(公告)日：1987-08-11

申请号：US942955

申请日：1986-12-17

Applicant: Yoshihiko Sato ,  Nobuaki Yamamoto

Inventor： Yoshihiko Sato ,  Nobuaki Yamamoto

IPC: H01J23/05 ,  H01J1/13 ,  H01J25/50

CPC classification number: H01J23/05

Abstract: A method of manufacturing a cathode for magnetron comprises a cathode sleeve formed as a hollow cylinder, a heater inside the sleeve, two end shields formed around the sleeve at a prescribed interval and an electron emitting material applied around the sleeve between both end-shields, wherein a plurality of isolated projections are almost regularly and intergraly formed around the sleeve between the end-shields, and the above electron emitting material is applied onto the cathode sleeve to fill gaps among the plural projections.According to the method of manufacturing a cathode of the present invention, the efficiency of electron emission and electric conductivity are not lowered, whereby the stable operation can be realized for a long term.

Abstract translation: 制造磁控管用阴极的方法包括形成为中空圆柱体的阴极套筒，套筒内的加热器，以规定间隔围绕套筒形成的两个端盖，以及在两个端盖之间施加在套筒周围的电子发射材料， 其中多个隔离的突起在端盖之间围绕套管几乎规则地并且整体地形成，并且将上述电子发射材料施加到阴极套上以填充多个突起之间的间隙。 根据本发明的阴极的制造方法，不会降低电子发射效率和电导率，从而可以长期实现稳定的动作。

公开(公告)号：US4675573A

公开(公告)日：1987-06-23

申请号：US768883

申请日：1985-08-23

Applicant: George V. Miram ,  Robert C. Treseder

Inventor： George V. Miram ,  Robert C. Treseder

IPC: H01J1/13 ,  H01J23/04 ,  H05B39/00 ,  H05B41/14

CPC classification number: H01J1/135 ,  H01J1/13 ,  H01J23/04

Abstract: Disclosed are a method and apparatus for rapidly heating a thermionic vacuum tube cathode, thereby enabling the vacuum tube to be placed in useful operation shortly after the tube is switched on. Rapid heating of the cathode is achieved by passing current through the cathode, thereby directly heating it. Simultaneously, the cathode is also heated by an indirect radiant heater and by electron bombardment by electrons emitted from the heater. When the cathode reaches its operating temperature, the direct heating current and the electron bombardment are stopped and the cathode is maintained at its operating temperature by the indirect heater alone. Cathode warm-up times of less than 1 second may be attained using this invention.

公开(公告)号：US4594554A

公开(公告)日：1986-06-10

申请号：US509517

申请日：1983-06-30

Applicant: Jerome D. Schick

Inventor： Jerome D. Schick

IPC: H01J37/06 ,  H01J1/13 ,  H01J37/24 ,  H01J37/244 ,  H01J19/82 ,  H05G1/52

CPC classification number: H01J37/242 ,  H01J1/135

Abstract: A method of extending the lifetime of an electron beam filament, typically LaB.sub.6 by applying power to the filament over a preselected period in a substantially linear manner. The time period is typically 20 minutes before a steady state power level is attained with a fully stabilized instrument. Power-down is a reverse of the power-up sequence until all power is removed.

Abstract translation: 一种延长电子束灯丝寿命的方法，通常在大部分线性方式的预选时间内，通过在灯丝上施加电力来延长寿命。 在完全稳定的仪器达到稳态功率水平之前，时间通常为20分钟。 断电功能与上电顺序相反，直到所有电源都被去除。

公开(公告)号：US4524297A

公开(公告)日：1985-06-18

申请号：US416840

申请日：1982-09-13

Applicant: Georg Gartner

Inventor： Georg Gartner

IPC: H01J1/14 ,  H01J1/13 ,  H01J1/15 ,  H01J1/28 ,  H01J9/04

CPC classification number: H01J1/13 ,  H01J1/28 ,  H01J9/04

Abstract: A cathode having a layer structure in which alternate layers consisting essentially of emitter material (2) and base material (1) are provided at an oblique angle to the cathodes's macroscopic emitting surface. In a preferred embodiment the surface has a microscopically stepped structure formed by ends of the base material layers and portions of the emitter material layers coating the ends. In an alternative embodiment the surface is not stepped but is formed by a polycrystalline or a preferentially oriented polycrystalline coating layer which is provided on the succession of beveled layers. The succession of layers is manufactured by alternating depositions from the gaseous phase and by subsequent bevel grinding of the layers. The polycrystalline coating layer is provided by deposition from the gaseous phase. The stepped surface is formed, for example, by selective structure etching after the bevel grind.

Abstract translation: 具有层结构的阴极，其中基本上由发射极材料（2）和基底材料（1）组成的交替层以与阴极的宏观发射表面倾斜的角度设置。 在优选实施例中，表面具有由基材层的端部和覆盖端部的发射体材料层的部分形成的微观阶梯结构。 在替代实施例中，表面不是阶梯状的，而是由多晶或优先取向的多晶涂层形成，该多晶涂层设置在一系列斜面层上。 层的连续通过从气相的交替沉积和层的随后斜切研磨来制造。 通过从气相沉积提供多晶涂层。 台阶表面例如通过斜面研磨后的选择性结构蚀刻形成。