Abstract: A system and method of magnetically insulating the cathode of a cold-cathode electron gun is achieved. A strong magnetic field is applied in the vicinity of the cold cathode to deflect and constrain the flow of electrons emitted from structures within the electron gun. The magnetic field largely prevents re-reflected primary and secondary electrons from reaching the cathode, thereby improving the operation and increasing the life of the cold-cathode electron gun. In addition, the insulating magnetic field improves electron beam focusing and enables a reduction in the magnitude of static electric focusing fields employed in the vicinity of the cold cathode, further reducing the electron gun's susceptibility to destructive arcing.

Abstract: Ignition apparatus includes high tension ignition cable. The cable is of low electrical resistance per unit length. A central core of the cable is formed of carbon fibre filaments. An insulating layer is provided around the core. A semiconductor layer is provided around the insulating layer. Another insulating layer is provided around the semiconductor layer. A layer of yarn around the other insulating layer forms a protecting layer. A protective layer of a flame retardant material forms an outer layer of the cable. The ignition apparatus also includes one or more of: a field stabilizer device for stabilizing and regulating high tension voltage in the cable; resistor spark plugs; connectors fitted to ends of the cable that include resistors therein, such as resistor spark plug boots.

Abstract: A liquid crystal display device includes a liquid crystal display panel, a lamp disposed behind the liquid crystal display panel, a cover accommodating the lamp, and an inverter disposed behind the cover. The inverter includes a substrate and a transformer mounted on the substrate and driving the lamp. The transformer includes a core and a coil that is wound around at least a part of the core. The liquid crystal display panel further includes a transformer cover which covers the coil, an inverter cover which covers the inverter and the transformer cover, and a metal member in the transformer cover.

Abstract: The present High Intensity Discharge electronic lamp ballast uses a “set of controls” that can be performed by controlling energy delivery by the “line side converter” to the “lamp side inverter”. This set of controls comprises: 1) open circuit voltage control, 2) breakdown voltage amplitude control, 3) glow-to-arc transition current control, 4) “initial arc development” current control, 5) “arc stabilization” current control, 6) lamp power control, 7) lamp dimming, 8) “lamp rectification” current control, and 9) short circuit and lamp fault protections. One of the primary advantages of this “line side converter” energy delivery control method is that it doesn't need to vary the lamp operating frequency to achieve the above-noted controls.

Abstract: A single sheet film filter and a manufacturing method thereof and a plasma display apparatus with the single sheet film filter capable of preventing ground problems, securing ground resistance, and reducing ground processing time. This single sheet film filter includes a conductive layer for shielding EMI arranged on one surface of a transparent base film and having a ground portion at an edge region on the base film and a hard coating layer covering the conductive layer in which the ground portion is exposed through a plurality of apertures in a stripe shape formed in the hard coating layer.

Abstract: A multicharged ions generating source that is easy to manufacture, excellent in controllability and maintainability, high in degree of ionization and large in beam intensity and a charged particle beam apparatus using the same are disclosed. The multicharged ions generating source includes an ion source electrode (3) comprising an electron source (4), a drift tube (5) that constitutes an ion trapping region and a collector (6), a superconducting magnet (11) for ion entrapment, an ion infeed means (20, 22), a first vacuum chamber (2) receiving the ion source electrode (3), a second vacuum chamber (10) receiving the superconducting magnet (11), and a vacuum pumping unit (15, 16) provided for each of the first and second vacuum chambers. The first and the second vacuum chambers (2) and (10) are made removable from each other, and only the ion source electrode (3) to be held at extremely high vacuum can be baked for degassing.

Abstract: An image display apparatus includes a display panel having a plurality of electron emission portions that emit electrons, a plurality of light emitting regions positioned corresponding to the plurality of electron emission portions to emit light in response to irradiation of electrons from the electron emission portion thereon, and a shielding member provided between a substrate having the electron emission portions provided thereon and an opposing substrate having the light emitting regions thereon, and a correction circuit that corrects a pixel signal for modulating the electron emission portions. The shielding member shields electrons reflected from peripheral light emitting regions adjacent to a predetermined one of the light emitting regions to the predetermined light emitting region, and irradiates electrons from the shielding member to the predetermined light emitting region.

Abstract: A system for producing energetic particles including a housing containing an anode and a cathode, wherein the anode is connected to a voltage supply and the cathode is one of a cathode containing an oxide layer and a cathode in the presence of oxygen, said cathode is grounded; a vacuum source connected to the housing for providing a reduced pressure in the housing; and a supply of at least one gas connected to the housing for introducing the at least one gas into the housing containing deuterium and oxygen.

Abstract: A display apparatus having a display module, to display a picture, includes a front casing positioned adjacent to a front and side of the display module, and a rear casing positioned in a rear of the display module and with a plurality of air slits, to dissipate heat generated in the display module. The front casing includes an insulator, to prevent the heat generated in the display module from being transferred exterior of the front casing. The display apparatus prevents heat from being transferred from a display module to the exterior of a front casing. Further, debris created while a screw is inserted does not fall toward the display module, thereby preventing the display module from a malfunction due to the fallen debris.

Abstract: A lighting fixture for use in an environment which requires protection from EMI/RFI emissions. The fixture comprises a body forming a light-emitting opening, lighting components including at least one lamp in the body, a lens covering the opening, and a conductive grid across the opening, the grid being separate from the lens, electrically connected to the body, and positioned between the lighting components and the opening.

Abstract: A conduit enclosure system for enclosing an engine wiring harness includes a conduit manifold configured to removably enclose a manifold portion of the engine wiring harness, the conduit manifold having a manifold outlet for each corresponding harness branch of a plurality of harness branches of the engine wiring harness. The conduit enclosure system also includes a conduit branch for each corresponding harness branch, the conduit branch being configured to removably lengthwise enclose each corresponding harness branch. The conduit branch has a first branch end and a second branch end, the first branch end being coupled to a corresponding manifold outlet, and the second branch end being coupled to the exposed portion of a corresponding control component of the plurality of control components in sealing engagement for sealing the exposed portion.

Abstract: An electronic device having a bezel structure includes a case, an installation element, part of which is installed to the case, a conductive bezel having a loop shape to fixedly couple the installation element to the case, and an electronic unit provided in the case. The conductive bezel includes a support portion to directly support a circumference of the installation element, and a separation portion formed at one or more positions of the support portion to separate the support portion by a predetermined interval to restrict formation of an electrical loop.

Abstract: A process and system are disclosed for supplying electrical energy to a device located in a room housing an imaging system (such as an MRI system, for example), wherein the room is shielded from external electromagnetic fields. Certain embodiments of the present invention provide systems and processes for emitting electromagnetic radiation in the wavelength range of the light spectrum from at least one light emission device. Embodiments of the present invention further provide a process and system for transforming the electromagnetic radiation into electrical energy using at least one transducer device located in the room, and supplying the electrical energy to the device so as to minimize interfering electromagnetic fields within the room.

Abstract: An image display apparatus includes a display panel having a plurality of electron emission portions that emit electrons, a plurality of light emitting regions positioned corresponding to the plurality of electron emission portions to emit light in response to irradiation of electrons from the electron emission portion thereon, and a shielding member provided between a substrate having the electron emission portions provided thereon and an opposing substrate having the light emitting regions thereon, and a correction circuit that corrects a pixel signal for modulating the electron emission portions. The shielding member shields electrons reflected from peripheral light emitting regions adjacent to a predetermined one of the light emitting regions to the predetermined light emitting region, and irradiates electrons from the shielding member to the predetermined light emitting region.

Abstract: A CRT electric field shield display apparatus with an FBT having a plurality of high voltage output terminals, includes an offset voltage generator generating an offset voltage to offset an electric field due to high voltages outputted from the plurality of high voltage output terminals; and an electric field shielding member disposed around the FBT and having a conductor to which the offset voltage is applied.

Abstract: A plasma reactor sub-assembly includes both an electrostatic shield and a process tube. Optionally, the electrostatic shield and the process tube are connected. Alternatively, they are configured to fit together without being physically connected. The sub-assembly may be manufactured using a process tube nested within the circumference of an electrostatic shield, an electrostatic shield patterned directly on a process tube using, for example, thin film deposition, or a process tube bonded or not bonded to an electrostatic shield made of a flexible, electrical film material.

Abstract: An electromagnetic interference (EMI) prevention apparatus for a flat panel display which is capable of modulating the frequency of an input clock signal using a spread spectrum clocking method to increase the frequency of the clock signal and reduce the amplitude thereof so as to reduce EMI by a clock signal generated from a format converter of the flat panel display. The amount of electromagnetic energy radiated from a signal source of the flat panel display can be reduced to eradicate the root of an EMI problem, thus excluding the use of a conventional shielding plate or device.

Abstract: Disclosed is an LCD device including an electromagnetic wave shielding member for shielding the electromagnetic waves generated from electric power applied to lamp of backlight assembly. The shielding member comprising conductive material is coated on surface of a diffusing plate to have mesh shape. The shielding member is filled into groove formed on the surface of the diffusing plate to have mesh shape. Accordingly, the electromagnetic waves may be shielded from the LCD panel. Furthermore, the shielding member makes electrical contact with the chassis of the LCD device through various ground members so as to be connected to an earth potential, thereby being stabilized electrically. Accordingly, display quality of the LCD device is improved. A conductive tape is used as the ground member, and the conductive tape is strongly fixed to the chassis of the LCD device by means of conductive fixing clip or conductive screw.

Abstract: A display system is provided that reduces electromagnetic emissions of at least one frequency component of a signal in the display system. A signal that drives a display is modulated so that one or more frequency components of the driving signal are attenuated due to the modulation of the signal. In one embodiment, an LCD controller is adapted to provide a modulated row driving signal to an active matrix LCD. The input data source may be adapted to accommodate the modulated display driving signal. Alternatively, a FIFO buffer is used to buffer input data to accommodate the modulated display driving signal. In a further embodiment, a clock modulating circuit is provided to modulate the display driving signal without modifying the display controller.

Abstract: A color cathode ray tube having a striped phosphor screen is provided, in which color displacements due to the tube axis (Z-axis) component of the terrestrial magnetism can be decreased at low cost. A positive temperature coefficient thermistor and a degaussing coil are connected in series to an AC power source (AC 100V) via a switch. A rectifier/smoothing circuit is provided in parallel to the positive temperature coefficient thermistor. When the switch is turned on, an ordinary degaussing process due to the AC attenuating magnetic field interlinked to the degaussing coil is performed, and the DC magnetic field in the Y-axis direction interlinked to the degaussing coil decreases the influence of the terrestrial magnetism in the tube axis direction (Z-axis direction).

Abstract: The plasma display apparatus has a noise filter circuit with a noise filter connected to an AC supply disposed at the back side of a plasma display panel. The plasma display apparatus also has a back cover composed of a magnetic metal material disposed at the back side of the plasma display panel to cover the noise filter circuit, wherein magnetic lines of force in a core, made of magnetic material and including the noise filter direct approximately identical to the in-plane direction of the back cover. The configuration can eliminate audible noises because the amount of leakage flux passing through the back cover is reduced.

Abstract: A magnetically shielded fluorescent lamp ballast case for shielding human beings from the negative effects of magnetic fields emanating from a fluorescent lamp ballast is made of a ferromagnetic alloy, or lined on the inside or the outside of the fluorescent lamp ballast case with such foil alloys. The ferromagnetic alloy for the magnetically shielded fluorescent lamp ballast case is a soft magnetic material. The soft magnetic material is a metal alloy containing one or more than one of the following elements: iron, nickel, or cobalt. The fluorescent lamp ballast case can be made of steel or aluminum, and lined on the inside or the outside of the ballast case with a ferromagnetic foil alloy which is attached to the steel or aluminum by adhesive. The magnetically shielded fluorescent lamp ballast case for a fluorescent lamp ballast can be employed for core coil fluorescent lamp ballasts or for electronic solid state fluorescent lamp ballasts.

Abstract: A luminous discharge display device having two distinct, independent discharge chambers, stacked vertically; of substantially flat circular shape containing inert gas mixtures, and a central electrode coupled to a power supply which provides ionizing means for the gas. The device utilizes two grooves formed into defining members of the discharge chambers to increase the capacitance along their length due to the inverse relationship between dielectric width and capacitance. Two electrode assemblies are biased out of phase with respect to the main electrode further increasing the capacitance and converging the luminous discharge at that specific point and are fitted into the circular grooves. A clock mechanism moves the electrode assemblies along their respective grooves thus creating a controlled motion of the luminous glowing plasma.

Abstract: The present invention relates to a cathode ray tube, and more particularly, to a cathode ray tube with reduced stray emissions by improving the electrical conductivity of an electrode material of an electron gun housed in a funnel of the cathode ray tube.

Abstract: A degaussing circuit for compulsorily degaussing a picture tube of a CRT monitor by causing alternating current to flow through a degaussing coil. A switching part, connected to a first end of the degaussing coil, switches a current flowing into the degaussing coil on/off. A chargeable device connected to the first end or to a second end of the degaussing coil removes a potential difference across the degaussing coil when the switching part is turned off. Alternatively, chargeable devices may be connected to both the first and second ends of the degaussing coil. Thus, an electromagnetic field is prevented from being generated by the residual current in the degaussing coil, to thereby meet electromagnetic field safety standards for the monitor.

Abstract: Disclosed are a computer system and an image processing method, that can easily reduce the EMI (electromagnetic interference), introduced into a liquid crystal display using the spread spectrum. The computer system includes a graphic processing unit for converting the image signal provided from at least either of a central processing unit and a memory into a signal that can be displayed on a screen, and a spread spectrum unit, provided between the graphic processing unit and the liquid crystal display, for modulating a frequency of a clock signal from a clock generator within a predetermined frequency range.

Abstract: The invention is a microwave powered lamp (10). The lamp includes a light reflective cavity (28); an electrodeless bulb (16) contained in the light reflective cavity (26) from which light is emitted when the electrodeless bulb is excited by microwaves; a magnetron (12) for providing the microwaves for exciting the electrodeless bulb; a waveguide (14) which couples the microwaves emitted by the magnetron to the light reflective cavity for exciting the electrodeless bulb; a housing (22) which contains the lamp; a detector (102, 202) disposed within the housing, which detects the microwaves which are not coupled to the bulb during operation of the magnetron and outputs a signal indicative of a level of received microwaves; and a magnetron control (300), coupled to the detector, which causes the magnetron to be turned off when a level of the signal indicates the level of received microwaves exceeds a threshold.

Abstract: A waterproof Christmas light bulb includes a connection tube formed on top of the socket and having a diameter smaller than a diameter of the socket so that a step is formed at a joint between the socket and the connection tube. A bulb is partially received in the connection tube. Two wires are oppositely formed on a side of the bulb, and a dividing plate is integrally formed on a bottom of the bulb. An O ring rests on and is supported by the step. An enclosure is securely connected to the connection tube by a securing device so that the O ring is securely clamped between the enclosure and the step of the socket to complete a waterproof engagement between the enclosure and the socket. A plug is received in the socket to have a waterproof engagement with the cables and the inner periphery of the hollow socket.

Abstract: An electromagnetic shield is provided and includes a shield body having an upper wall connected to opposing side walls and opposing end walls. At least two opposing walls of the electromagnetic shield each have a plurality of resilient fingers formed at a lower edge thereof. The electromagnetic shield also includes a solder mass securely held by the fingers by being interleaved between the fingers of each of the at least two opposing walls. The interleaving of the solder mass results in the solder mass being securely held by the fingers and ready for mounting to an electronic component for shielding a portion of the electronic component from undesirable and potentially damaging emissions from neighboring components. A method of mounting an electromagnetic shield to an electronic component having a planar surface and a method of interleaving the solder mass are also provided.

Abstract: A cathode ray tube includes an evacuated envelope including a face panel, a funnel, and a neck; a color selection apparatus mounted inwardly from the face panel; an electron gun mounted within the neck; a magnetic shield mounted connected to the color selection apparatus; and degaussing coils mounted to an outer surface of the evacuated envelope. A degaussing current flowing to the degaussing coils has a waveform such that a line connecting a peak A from where a maximum current value first starts to decrease and a peak G of a sixth cycle is a functional curve of a second degree or greater.

Abstract: A degaussing circuit for compulsorily degaussing a picture tube of a CRT monitor by causing alternating current to flow through a degaussing coil. A switching part, connected to a first end of the degaussing coil, switches a current flowing into the degaussing coil on/off. A chargeable device connected to the first end or to a second end of the degaussing coil removes a potential difference across the degaussing coil when the switching part is turned off. Alternatively, chargeable devices may be connected to both the first and second ends of the degaussing coil. Thus, an electromagnetic field is prevented from being generated by the residual current in the degaussing coil, to thereby meet electromagnetic field safety standards for the monitor.

Abstract: An electrodeless lighting apparatus using microwave comprises: a waveguide for transmitting microwave generated in a magnetron; a mesh screen coupled to an outlet portion of the waveguide for blocking a leakage of the microwave and passing light; a bulb located in the mesh screen for emitting light by generating plasma by the microwave; and a globe installed on outer area of the mesh screen so that the light generated in the bulb can be radiated to omnidirection, that is, the globe is installed around the bulb instead of a reflector and a light guide which are used in the conventional art, and thereby, a structure of the lighting apparatus can be made simply and an omnidirectional lighting can be performed.

Abstract: A discharge lamp driver circuit is provided which features a field canceller. The driver circuit includes a power supply circuit which turns on and off a switching element to step up a dc voltage and provide it for turning on a discharge lamp. The power supply circuit includes an electrical path through which an interrupted current arising from the on-off operation of the switching element flows. The field canceller includes an electric line through which the interrupted current having passed through the electrical path flows in an opposite direction, thereby producing a field canceling a field caused by flow of the interrupted current through the electrical path.

Abstract: A cathode ray tube includes an evacuated envelope including a face panel, a funnel, and a neck; a color selection apparatus mounted inwardly from the face panel; an electron gun mounted within the neck; a magnetic shield mounted connected to the color selection apparatus; and degaussing coils mounted to an outer surface of the evacuated envelope. A degaussing current flowing to the degaussing coils has a waveform such that a line connecting a peak A from where a maximum current value first starts to decrease and a peak G of a sixth cycle is a functional curve of a second degree or greater.

Abstract: By passing electric current through a degaussing coil within a vertical retrace period, a displayed image is prevented from disturbance and yet color blurs on the way of degaussing process are made indiscernible. In the process of discharging charges filled in capacitors C1 and C2 through the degaussing coil, a damped oscillation current by a closed loop of one of the capacitors and the degaussing coil is generated, and then a damped oscillation current of opposite polarity generated by a closed loop of the other capacitor and the degaussing coil is passed, within such a short time as color blurs in the degaussing process cannot be discerned and during the vertical retrace period. With these two damped oscillation currents paired, degaussing operation is fulfilled.

Abstract: Two closed-loop coils are respectively set at the top or the bottom of a cathode ray tube. These two closed-loop coils serves in a pair as a cancel coil. Each closed-loop coil is positioned so as to make an interlinkage with the magnetic field leakage that escapes from the deflection yoke, a part of the closed-loop coil running almost in parallel to the top or bottom edge of an effective display region of a front panel.

Abstract: The present invention is a microwave excited lamp and a microwave gasket. A microwave excited lamp (10) in accordance with the invention includes at least one microwave source (12); a microwave structure (20) comprising a metallic material to which microwaves are coupled from the microwave source; the microwave structure, including a reflector (22) comprising the metallic material and containing a microwave excited bulb (24) which emits light in response to coupling of microwave power thereto from the microwave source; and at least one microwave gasket (100) which provides a microwave tight seal between a surface of the reflector and at least one other metallic part of the microwave structure with the gasket comprising the metallic material; and wherein during operation of the lamp a microwave current maxima flows on a surface of the gasket and the reflector.

Abstract: This invention relates to a method and apparatus for the reduction of electromagnetic radiation from display screens. The display screen is substantially encased within a conductive shield formed by the housing around the display screen, a rear housing and a conductive coating or layer over the front face of a PCB panel on which light-emitting elements may be mounted. Interconnections are provided between all the components of the shield so as to limit any gaps within the shield to a size sufficiently small to minimize damaging electromagnetic noise.

Abstract: A high intensity discharge (HID) lamp includes a starting gas, a vaporizable fill, and only one electrode sealed within a light transmissive envelope. The one electrode produces a high intensity discharge during operation of the lamp and is connected to an inlead that extends outside the sealed envelope. A ground for electric field lines emanating from the electrode during operation of the lamp is outside the envelope. The ground may be a reflector for the lamp that has an electrically conductive surface. The high intensity discharge is initiated by applying high frequency power to the inlead.

Abstract: A cathode ray tube includes a tube having a panel, a funnel, and a neck, a color selection apparatus mounted to the panel within the tube, an inner shield connected to the color selection apparatus. The inner shield includes a plurality of side walls that form a center opening through which electron beams pass, and at least one degaussing coil mounted at outer surface of the tube. The degaussing coil includes a first coil mounted toward the panel, a second coil mounted toward the neck, and a third coil connected to ends of the first coil and the second coil to interconnect the first coil and the second coil. The second coil is mounted on the tube in a state substantially overlapping distal edge portions of the side walls of the inner shield on which the second coil is mounted.

Abstract: An improved double chamber ion source comprising a plasma generating chamber, a charge exchange chamber and a divider structure therebetween. The charge exchange chamber includes magnetic shielding material to reduce exposure of interior components to magnetic field lines externally generated. The double compartment ion source further comprises inclusion of a heat shield and/or a cooling system to overcome deleterious effects caused by increased temperature in the plasma generating chamber. The divider structure has a plurality of apertures having a configuration to reduce surface area on the divider structure in the charge exchange chamber.

Abstract: The present invention relates to a color display device comprising a color display tube (1) with a front portion having a truncated cone (3), an element (5) for generating a plurality of electron beams, a shielding (9) of ferromagnetic material extending substantially parallel to the truncated cone (3), and a demagnetizing device having at least two demagnetizing coils (11,12) extending along the outer circumference of the cone (3). The demagnetizing device is arranged to energize the coils (11,12) simultaneously and with a phase difference, resulting in the generation of a rotating magnetic field. As the magnetic field rotates, it can be arranged to substantially coincide with the shape of the shielding (9), resulting in a magnetic field that is parallel to the shielding (9) over a larger part of the shielding surface. This improves the demagnetizing procedure, leading to a better landing performance of the electron beams.

Abstract: To construct a CRT display device capable of effectively suppressing unwanted radiation of electromagnetic waves occurring as a result of horizontal deflection or vertical deflection. A correction lead (6) series-connected to horizontal deflection coils (1) is disposed at outer peripheral positions of the horizontal deflection coils (1) and between the horizontal deflection coils (1) and a faceplate of a CRT (4). With this arrangement, electromagnetic fields produced by the horizontal deflection coils are canceled out by electromagnetic fields produced by the correction lead (6), thereby suppressing unwanted radiation of electromagnetic waves at the deflection frequency and its harmonic components.

Abstract: An ignition apparatus includes a magnetic circuit comprising a central core and a side core or shield, and primary and secondary windings. The shield is allowed to electrically float, thereby reducing the capacitance of the secondary winding. A housing is external to and surrounds the shield to inhibit arcing. A silicone boot overlaps a housing/case interface to further suppress arcing.

Abstract: Shielding devices and methods are disclosed for canceling the effects of external magnetic fields that otherwise would interfere with proper functioning of a charged-particle-beam (CPB) optical system inside a column. In one embodiment, openings and other disruptions in the continuity of the column are flanked by respective coil sets. Each coil set includes multiple coils that are individually electrically energized. The coils can be inside the column, outside the column, or both inside and outside. The magnitude and direction of the respective composite magnetic fields generated by the coil sets can be changed by adjusting the respective electrical currents flowing through the individual coils. Thus, the magnitude and direction of the composite magnetic field can be manipulated as required to cancel the effects of the interfering magnetic field. In addition, the column can be situated within a shield of an anisotropic magnetic material in which the magnetic flux most readily flows in selected directions.

Abstract: Two closed-loop coils are respectively set at the top or the bottom of a cathode ray tube. These two closed-loop coils serves in a pair as a cancel coil. Each closed-loop coil is positioned so as to make an interlinkage with the magnetic field leakage that escapes from the deflection yoke, a part of the closed-loop coil running almost in parallel to the top or bottom edge of an effective display region of a front panel.

Abstract: A dimmable electrodeless light source includes an electrodeless lamp, an electronic ballast and a dimming module. The light source further includes coupling transformers coupled to the electrodeless lamp for inductively coupling power to the lamp to generate light. An auxiliary winding electromagnetically coupled to the primary winding of at least one of the coupling transformers is driven by switching circuitry in the dimming module. The switching circuitry is pulse width modulated to control the average brightness of the light generated by the electrodeless lamp. An exemplary application for the dimmable electrodeless light source is as a backlight for a video display device, such as a liquid crystal display unit. The dimmable electrodeless light source further includes a magnetic shield device that is operably positioned with respect to the electrodeless lamp.

Abstract: An EMI attenuation device comprising at least two substrates such that the spacing between these substrates is selected to maximize shielding performance at a particular frequency. The device further comprises additional substrates arranged at predetermined distances from the first two substrates to optimize shielding performance. A method also is provided for a multistep, attenuation of impinging EMI, wherein the method also enables see-through and/or hear-through monitoring. Salient features of the method include relatively positioning a plurality of electrically conductive substrates, each of a particular topology, so as to maximize attenuation of the EMI at particular frequencies.

Abstract: A method of attenuating an unwanted electric field radiation caused by electrostatic induction on an internal conductive coating of a cathode ray tube by a pulse voltage generated by a deflection circuit is provided. A reverse pulse voltage, which is reverse in polarity to the pulse voltage of the deflection circuit, is impressed on an external conductive coating of the cathode ray tube and electrostatic induction induces a pulse voltage on the internal conductive coating which is reverse in polarity to a pulse voltage of the deflection yoke induce on the internal conductive coating through an electrostatic capacitance existing between the internal conductive coating and the external conductive coating so that an unwanted electric field radiation from the front screen of a cathode ray tube is attenuated.

Abstract: Two closed-loop coils are respectively set at the top or the bottom of a cathode ray tube. These two closed-loop coils serves in a pair as a cancel coil. Each closed-loop coil is positioned so as to make an interlinkage with the magnetic field leakage that escapes from the deflection yoke, a part of the closed-loop coil running almost in parallel to the top or bottom edge of an effective display region of a front panel.