公开(公告)号：US5905339A

公开(公告)日：1999-05-18

申请号：US764700

申请日：1996-12-04

申请人： Hui-Meng Chow ,  Jose Azevedo ,  Susan McGee

发明人： Hui-Meng Chow ,  Jose Azevedo ,  Susan McGee

IPC分类号： H01J61/06 ,  H01J61/067 ,  H01J61/09 ,  H01J61/36 ,  H01J61/78

CPC分类号： H01J61/0677 ,  H01J61/067 ,  H01J61/09 ,  H01J61/36

摘要： An electric gas discharge lamp includes an electrode having a tip portion comprised by a mesh body carrying an emitter material. The mesh body in a favorable embodiment is circular cylindrical and is attached via an electrically conductive thermal isolator to a conductive feed-through, such as a hollow ferrule, extending through a seal of the lamp vessel. As compared to a continuous walled tip portion of similar shape and material, the mesh body has a lower mass and heat capacity, and can therefore be operated at higher temperatures without increasing the temperature of the seal area. The higher operating temperature of the tip portion promotes greater electron emission from the emitter material, and therefore a lower cathode fall. A lower cathode fall enables the lamp to be operated at higher lamp currents for greater light output. The mesh body also has the capability to reduce sputtering from the electrode through improved adhesion of the emitter material to the tip portion and faster attainment of its nominal operating temperature as compared to a smooth continuous walled body. In a favorable embodiment, the lamp is a low pressure discharge lamp having an inside diameter of less than about 5 mm.

摘要翻译： 电气放电灯包括具有由承载发射体材料的网状体构成的尖端部分的电极。 在有利的实施例中的网状体是圆柱形的并且通过导电隔热器附接到延伸穿过灯泡的密封件的导电馈通，例如中空的套圈。 与具有类似形状和材料的连续的壁顶部相比，网状体具有较低的质量和热容量，因此可以在较高温度下操作而不增加密封区域的温度。 尖端部分的较高工作温度促进发射体材料的更大的电子发射，因此下部阴极下降。 较低的阴极下降使灯可以在更高的灯电流下工作，以获得更大的光输出。 与光滑的连续壁体相比，网状体还具有通过改善发射体材料对尖端部分的附着力和更快地达到其标称操作温度来减少从电极溅射的能力。 在有利的实施例中，灯是内径小于约5mm的低压放电灯。

公开(公告)号：US5675214A

公开(公告)日：1997-10-07

申请号：US530503

申请日：1995-09-19

申请人： Andreas S. G. Geven ,  Jeroen C. Langevoort ,  Henricus L. A. A. Vogels ,  Patricius W. M. Lepelaars ,  Hui-Meng Chow

发明人： Andreas S. G. Geven ,  Jeroen C. Langevoort ,  Henricus L. A. A. Vogels ,  Patricius W. M. Lepelaars ,  Hui-Meng Chow

IPC分类号： H01J61/09

CPC分类号： H01J61/09

摘要： The low-pressure discharge lamp is discolsed having a lamp vessel into which hollow cylindrical electrodes enter, between which a discharge path extends. At least one of the electrodes has a tube at a distance from an end thereof, the tube extending in the discharge path. The tube is connected to the electrode by electrically conductive means and is coated with electron emissive material. The surface area of the material of the means in cross-section is at most 25% of the surface area of the material of the electrode in cross-section.

摘要翻译： 低压放电灯被歪斜，具有中空圆柱形电极进入其中的灯容器，排放路径延伸在其间。 电极中的至少一个具有距离其一端一定距离的管，该管在排出路径中延伸。 该管通过导电装置连接到该电极并且涂覆有电子发射材料。 横截面中装置材料的表面积至多为电极材料表面积的25％。

公开(公告)号：US5841222A

公开(公告)日：1998-11-24

申请号：US757531

申请日：1996-11-27

申请人： Jean J. Heuvelmans ,  Hui-Meng Chow

发明人： Jean J. Heuvelmans ,  Hui-Meng Chow

IPC分类号： H01J61/067 ,  H01J9/04 ,  H01J61/10 ,  H01J1/14

CPC分类号： H01J61/10 ,  H01J9/04 ,  H01J61/0672 ,  H01J61/72

摘要： A low-pressure discharge lamp of the invention is provided with a gas-tight discharge vessel (10) which contains an ionizable filling. Electrodes are arranged inside At least one of the electrodes has a tungsten coil (20.sub.A) which is electrically connected to current supply conductors (30.sub.A, 30.sub.A ') which extend to outside the discharge vessel (10). The coil (20.sub.A) has a central zone (21.sub.A) covered with an electron-emitting material (22.sub.A) and, on either side, boundary zones (23.sub.A, 23.sub.A ') between the central zone (21.sub.A) and respective current supply conductors (30.sub.A, 30.sub.A '). The boundary zones (23.sub.A, 23.sub.A ') having a covering (24.sub.A, 24.sub.A ') of a protective material, comprising a ceramic material having a specific resistance less than 1000 .mu..OMEGA..cm.

摘要翻译： 本发明的低压放电灯设置有包含可电离填充物的气密放电容器（10）。 电极设置在内部至少一个电极具有电磁连接到延伸到放电容器（10）外部的电流供给导体（30A，30A'）的钨线圈（20A）。 线圈（20A）具有用电子发射材料（22A）覆盖的中心区域（21A），并且在任一侧上，中心区域（21A）和各个供电导体（30A）之间的边界区域（23A，23A'） ，30A'）。 具有保护材料的覆盖物（24A，24A'）的边界区域（23A，23A'）包括比电阻小于1000微米欧米茄的陶瓷材料。

公开(公告)号：US5530317A

公开(公告)日：1996-06-25

申请号：US320037

申请日：1994-10-07

申请人： Martin F. C. Willemsen ,  Paul D. Goodell ,  Willem Van Erk ,  Hui-Meng Chow

发明人： Martin F. C. Willemsen ,  Paul D. Goodell ,  Willem Van Erk ,  Hui-Meng Chow

IPC分类号： H01J61/06 ,  H01J61/073

CPC分类号： H01J61/0737

摘要： The high-pressure metal halide discharge lamp has tungsten electrodes in a light-transmitting lamp vessel which is closed in a vacuumtight manner. The electrodes comprise an emitter which is distributed throughout their mass and is formed by a first oxide chosen from hafnium oxide and zirconium oxide and by a second oxide chosen from yttrium oxide, lanthanum oxide, cerium oxide and scandium oxide, and are substantially free from thorium oxide. The lamp retains its initial light output to a high degree throughout its life.

摘要翻译： 高压金属卤化物放电灯在透光灯容器中具有钨电极，其以真空密封的方式封闭。 电极包括发射体，其分布在其质量范围内，并由选自氧化铪和氧化锆的第一氧化物和选自氧化钇，氧化镧，氧化铈和氧化钪的第二氧化物形成，并且基本上不含钍 氧化物。 该灯在其整个使用寿命期间保持其初始光输出高度。