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| Number | Title | Issue Date |
| 7439661 | Image display apparatus having ION pump including permanent magnet It is an object of the present invention to provide an image display apparatus in which the change over time of its electron source characteristics is small, and in which uneven brightness and color shift of an image is almost unnoticeable. To achieve this object, t... | 10/21/2008 |
| 7180230 | RF induction lamp with reduced electromagnetic interference An electrodeless fluorescent lamp 10 has an envelope 12 that includes a chamber 14. A core 16 of magnetic material, preferably ferrite, is positioned in the chamber 14 and has a first winding 18 surrounding the core and havi... | 02/20/2007 |
| 7061170 | Deflection yoke having magnets for correcting raster distortion and cathode-ray tube apparatus having the deflection yoke A permanent magnet is selectively picked for a deflection yoke and provided on the periphery of the cathode ray tube for controlling the direction of an electron beam emitted towards a screen from an electron gun. The permanent magnet can adjust an irradiating point... | 06/13/2006 |
| 7038389 | Magnetron plasma source A point projection type flood plasma source implements a magnetron sputter cold cathode electron source in a discharge cavity separated from a process chamber by a narrow conduit and a solenoid magnetic field. The solenoid magnetic field impedes radial electron flow... | 05/02/2006 |
| 6979101 | Fluorescent lamp providing uniform backlight illumination for displays A bent fluorescent lamp for backlighting a display providing uniform illumination. A fluorescent lamp is made from a tubular glass envelope having right angles formed therein. The right angles provide improved illumination of a plane surface for backlighting a liqui... | 12/27/2005 |
| 6741032 | Plasma display panel using helicon plasma source A plasma display panel having a helicon plasma source. First and second substrates are mounted substantially in parallel with a predetermined gap therebetween. A plurality of address electrodes are formed on a surface of the first substrate opposing the second subst... | 05/25/2004 |
| 6639343 | Mercury-free metal halide lamp A mercury-free metal halide lamp includes an arc tube including a pair of electrodes inside the tube. In the arc tube, a rare gas and a metal halide are contained, and no mercury is contained. The mercury-free metal halide lamp is horizontally operated su... | 10/28/2003 |
| 6323586 | Closed drift hollow cathode In accordance with one specific embodiment of the present invention, the closed drift hollow cathode comprises an axisymmetric discharge region into which an ionizable gas is introduced, an annular electron emitting cathode insert disposed laterally about... | 11/27/2001 |
| 5997162 | Horizontal HID vehicle headlamp with magnetic deflection The efficiency of a horizontally operated arc discharge lamp has been found to be substantially improved by the application of a transverse magnetic field. The magnetic field moves the arc downward, away from the upper wall of the lamp envelope. The magne... | 12/07/1999 |
| 5959403 | Plasma display panel with magnetic partition walls A plasma display panel includes a plurality of discharge cells formed with a plurality of partition walls arranged at fixed intervals between a front substrate and a rear substrate disposed in parallel spaced at a certain distance. A fluorescent material ... | 09/28/1999 |
| 5828176 | Planar crossed-field plasma switch and method A cold-cathode, crossed field switch has a magnet system which generates a magnetic field that is radially-oriented about a switch axis and a planar electrode system which generates an axially-oriented electric field. These structures facilitate a switch ... | 10/27/1998 |
| 5717292 | Plasma displays employing magnetic enhancement Improved plasma displays utilize permanent magnet components for low-voltage operation. Permanent magnet components providing magnetic fields transverse to the direction of electron movement increase the electron pathlength, thereby enhancing the ionizati... | 02/10/1998 |
| 5608297 | Plasma switch and switching method with fault current interruption A plasma switch is provided which can limit fault currents to a range that is elecrostatically interruptible by a control grid. The switch includes magnets that generate a first magnetic vector which cooperates with an electric field to generate a plasma,... | 03/04/1997 |
| 5036290 | Synchrotron radiation generation apparatus Synchrotron radiation is generated when a base of charged particles is bent by a bending magnet. The synchrotron radiation passes down a lead-out duct as the total number of pumps is limited by the size of the apparatus and many pumps are needed in order ... | 07/30/1991 |
| 4945247 | Field emission electron gun system In a field emission electron gun system with a multi-stage acceleration tube comprising a field emission electron source, a field emission electrode for extracting the electrons, a magnetic lens having a magnetic gap between the field emission electron so... | 07/31/1990 |
| 4906890 | Hollow anode optical radiation source In a discharge tube for use in a housing for a vacuum, an improved optical radiation source is formed by a cathode and a hollow anode. The hollow anode has at least one first surface defining a hollow, partly closed space. The first surface is disposed fo... | 03/06/1990 |
| 4871947 | Apparatus for automatically correcting arc position of high pressure discharge lamp Disclosed is an apparatus for stabilizing the light output of a high pressure discharge lamp comprising a coil generating a magnetic field acting upon the arc of the high pressure discharge lamp, an arc position detector detecting deviation of the positio... | 10/03/1989 |
| 4870368 | Spiral line accelerator A casing has an entrance, an exit, linearly disposed, substantially parallel portions and curved portions joining the linear portions to define a spiral configuration. Electron pulses entering the casing are accelerated in the linear portions of the casin... | 09/26/1989 |
| 4855635 | Fluorescent lamp unit with magnetic field generating means A fluorescent lamp unit having a magnetic field generating means for improving the performance of the fluorescent lamp is disclosed. In a preferred embodiment the fluorescent lamp comprises four longitudinally extending leg portions disposed in substantia... | 08/08/1989 |
| 4835438 | Source of spin polarized electrons using an emissive micropoint cathode Spin polarized electron source using an emissive micropoint cathode. At least one portion of each micropoint, including the top of the latter, is ferromagnetic, so that the electrons emitted by the cathode are spin polarized in a given direction, when the... | 05/30/1989 |
| 4829276 | Optimal periodic permanent magnet structure for electron beam focusing tubes In the preferred embodiment a plurality of toroidally shaped magnets of slar size and configuraton are placed in a stack side-by-side in coaxial alignment. Alternate magnets in the stack are magnetized so that the magnetic dipole moment of each is orient... | 05/09/1989 |
| 4820955 | Traveling wave tube comprising periodic permanent magnetic focusing system with glass/epoxy retaining means A traveling wave tube has a cylindrical vacuum envelope surrounding a delay line. The vacuum envelope is tightly surrounded by a permanent magnet system of ring-shaped pole discs and of magnetic rings respectively arranged between the pole discs and oppos... | 04/11/1989 |
| 4810935 | Method and apparatus for producing large volume magnetoplasmas A large volume magnetoplasma is created by (a) establishing a plasma in an electrically isolated, tubular cavity formed by a cylinder (10) containing a source of ions and electrons at low pressure, into which rf energy is coupled by an antenna (32) alongs... | 03/07/1989 |
| 4797597 | Microwave ion source A microwave ion source is disclosed and includes a plain rectangular waveguide having a first section to which a microwave generator is coupled, a second section defining a discharge chamber and an intervening transformer section dimensioned to provide fo... | 01/10/1989 |
| 4782303 | Current guiding system The magnetomotive force of a current produces a magnetic field in magnetic material which encircles the current. Although magnetic material attracts a current, material having vanes repels the current because of magnetic flux lines produced between the va... | 11/01/1988 |
| 4745337 | Method and device for exciting a plasma using microwaves at the electronic cyclotronic resonance Method and device for exciting a plasma using microwaves at the electronic cyclotronic resonance. The device for exciting a gaseous medium by microwaves comprises at least a co-axial structure for introducing the microwave power inside a multipolar confin... | 05/17/1988 |
| 4745338 | Electromagnetically sustained plasma reactor An improved plasma arc reactor is provided with variably positionable electrodes, including a cylindrical anode electrode having an inner, frustoconical cavity providing a reaction chamber and a spherical cathode ball electrode mounted therein. Between th... | 05/17/1988 |
| 4740758 | Apparatus for generating a magnetic field in a volume having bodies influencing the field pattern Apparatus for generating a magnetic field having a spatially predetermined field pattern in a useful volume, where bodies of ferro-magnetic material influencing the field pattern are disposed in the useful volume. To assure a spatially predetermined field... | 04/26/1988 |
| 4721891 | Axial flow plasma shutter A shutter (36) is provided for controlling a beam, or current, of charged particles in a device such as a thyratron (10). The substrate (38) defines an aperture (60) with a gap (32) which is placeable within the current. Coils (48) are formed on the subst... | 01/26/1988 |
| 4720660 | Projector lamp A projector lamp comprising a single ended metal halide discharge lamp in a generally spherical reflector has been found to exhibit turbulence when running. The resulting fluctuation of light especially when used in conjunction with the reflector to conce... | 01/19/1988 |
| 4698547 | Low pressure arc discharge lamp apparatus with magnetic field generating means A low-pressure arc discharge apparatus having a magnetic field generating means for increasing the output of a discharge lamp is disclosed. The magnetic field generating means, which in one embodiment includes a plurality of permanent magnets, is disposed... | 10/06/1987 |
| 4581118 | Shaped field magnetron electrode A substrate support electrode for use in plasma processing equipment has a book-shaped prismatic body containing a magnet core with flange-like pole pieces at each end to provide a longitudinal magnetic field wrapped around the electrode body. An auxiliar... | 04/08/1986 |
| 4543465 | Microwave plasma source having improved switching operation from plasma ignition phase to normal ion extraction phase In a microwave plasma source, a discharge space supplied with a microwave electric field is supplied with a DC magnetic field. A material to be ionized is introduced into the discharge space to produce plasma, whereby ions are extracted through an ion ext... | 09/24/1985 |
| 4501990 | Electron tube, especially transmitting tube, with a device for eliminating interfering retarding-field effects Electron tube assemble having coaxial electrodes and grids, including a tube with given electrode trajectories and oscillation period, and interfering retarding-field effect elimination means disposed around the tube for generating a magnetic field having... | 02/26/1985 |
| 4417172 | Low pressure discharge lamp The present invention purposes to suppress flickering phenomena which is caused by moving striation of rare gas discharge in a low pressure discharge lamp tube containing therein mercury and a rare gas; an apparatus for lighting a low pressure discharge l... | 11/22/1983 |
| 4362972 | Thyratrons It is desirable not only to switch between circuits or circuit elements carrying relatively large currents but also to effect the switch-over operation extremely rapidly. Conventional thyratrons can be used to switch on the current, but they cannot easily... | 12/07/1982 |
| 4322661 | Cross-field plasma mode electric conduction control device Crossed-field plasma mode electric conduction control device 10 has an interelectrode space 16 between anode 12 and cathode 14 in which is produced a magnetic field 38 by coil 28. Electrons produced at region 46 travel through the crossed-fields to region... | 03/30/1982 |
| 4311942 | Compact fluorescent lamp and method and means for magnetic arc spreading A compact fluorescent lamp with a screw-in plug to fit conventional screw sockets which operates at 20-30 watts and provides the lumen output of a 75-100 watt lamp. The lamp is essentially a hollow cylinder with a glass envelope for the two outer walls. T... | 01/19/1982 |
| 4307317 | Bipolar crossed-field device including electromagnetic coils of the same polarity Bipolar crossed-field device 10 has outer electrode 12 and inner electrode 18 which define interelectrode space 16. Magnetic field coils 46, 48 operate together to form a magnetic field in the interelectrode space 16 shaped to trap electrons for cascading... | 12/22/1981 |
| 4267484 | Parallel multi-electrode spark gap switch A spark gap switching device for high peak currents including a pair of main electrodes with protruding, opposing sub-electrodes, surrounded by high permeability cores typically of ferrite material. Small air gaps separate the sub-electrodes. The switch i... | 05/12/1981 |
