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5914567 |
CRT display apparatus, field radiation restriction circuit and field radiation restriction electrode
A display apparatus including a CRT having a deflection yoke, a plurality of field radiation restriction electrodes and a field radiation restriction circuit including an amplitude adjuster for...
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5889370 |
Structure for eliminating noise in light source device for electronic endoscope
A structure for eliminating the noise in a light source device for an electronic endoscope safely eliminates the high-frequency noise produced from the lighting circuit, the xenon lamp and the like...
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5886472 |
Electrodeless lamp having compensation loop for suppression of magnetic interference
An electric lamp assembly includes an electrodeless lamp having an electrodeless lamp envelope enclosing a fill material for supporting a low pressure discharge, a driving inductor including a...
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5874879 |
Leakage flux canceling device
A leakage flux canceling device is provided which requires a small number of parts and which has high space factor. A leakage flux canceling device 30 is mounted to a funnel side of a deflecting...
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5847511 |
Automatic image rotation compensation circuit and method
An automatic image rotation compensation circuit includes: a terrestrial magnetic field detecting unit for detecting horizontal and vertical terrestrial magnetic fields of a place where a display...
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5841234 |
Device for shielding electric field emitted backward from video display appliance
A device for shielding an electrical field emitted backward from a video display appliance. The device includes a device for shielding an electrical field emitted backward from a video display...
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5841227 |
Radiation shield with opaque and transparent portion
An auxiliary radiation shield for a CRT-type video display terminal includes a generally flat front portion having an at least partially transparent conductive central shield and an opaque...
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5834904 |
Means for suppressing electromagnetic interference from RF-excited light sources
EMI suppression in electrodeless discharge lamps by inward RF-reflectance from the enclosure walls (12) of 90%+ and use of an absorber (16) of RF power having an absorption coefficient greater than...
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5831390 |
CRT with a transparent film and a compensating electrode
A transparent conductive film is formed on an outer surface of a face portion of a face panel and a phosphor screen is formed on an inner surface thereof. A conductive explosion proof band is wound...
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5825130 |
External metallization configuration for an electrodeless fluorescent lamp
An electrodeless fluorescent lamp having an emission suppression arrangement utilizing a capacitive filtering element formed by a first conductive layer disposed on a portion of the interior...
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5818171 |
Device for removing electric field of display
A device for removing electric field of a display according to the present invention comprises: a voltage generator connected to a horizontal deflection output circuit of a CRT and generating an...
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5814941 |
Device for eliminating low frequency radiation of monitor
A device for eliminating low frequency radiation of a computer monitor is disclosed, including a pair of first conductive plates disposed on two opposite sides of a cathode ray tube of the monitor...
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5811923 |
Plasma display panel with infrared absorbing coating
The present invention is directed to methods and apparatus for enhancing the performance of visual display units which utilize plasma display panels. More specifically, the present invention...
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5789872 |
Leakage field decreasing device for CRT display
The invention provides a device for effectively decreasing the electric field irradiated from the front surface of a CRT display. This device cancels the leakage field composed of a deflection...
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5786668 |
Electromagnetic field shielding circuit for a display
An electromagnetic field shielding circuit is disclosed. The circuit comprises a phrase inverting circuit, coupled to a turn in the secondary windings, for generating an inverted phase with respect...
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5757117 |
Cathode ray tube with conductive silicon adhesive
In a cathode ray tube having an antistatic film 6 stuck to the front surface of a panel section 1 and a conductive tape 7 for grounding the end portion of the antistatic film 6 to the earth, a...
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5742128 |
Apparatus for mitigating the effects of ambient magnetic fields on the operation of a CRT
Apparatus for mitigating the adverse effects of magnetic interference on the operation of a CRT is provided. More specifically, magnetic sensors are placed in a gap formed between a front bezel and...
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5734234 |
Cathode ray tube display with deflection yoke and radiation shield
A display comprising a cathode ray display tube (1) having an electromagnetic deflection yoke (2) is described. A pair of first deflection coils (7,6) are located symmetrically about the...
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5714843 |
CRT spot killer circuit responsive to loss of vertical synchronizing signal
An improved spot elimination circuit for a monitor capable of Display Power Management Signaling function prevents an occurrence of a focused beam spot from the phosphor screen of a cathode ray...
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5708331 |
Electrodeless lamp with external insulative coating
An electrodeless, low pressure gas discharge lamp includes a vitreous envelope containing a discharge medium and being shaped with an external chamber for receiving an electrical excitation...
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5705899 |
CRT display having compensation for image rotation and convergence errors
A color display device comprising a cathode ray tube and a deflection unit also includes a compensation coil or a compensation-coil system, for example, on the outside of the yoke of the deflection...
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5702179 |
Discharge lamp having light-transmissive conductive coating for RF containment and heating
A discharge lamp, such as a neon lamp or a subminiature fluorescent lamp, includes an elongated tubular lamp envelope containing a fill material for supporting a light-emitting discharge and...
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5701061 |
Cathode-ray tube apparatus and yoke
A cathode-ray tube apparatus capable of reducing a high frequency electric field radiated from the deflection yoke and the deflection and high voltage circuit to the outside of the cathode-ray tube...
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5696565 |
Demagnetizing device is automatically energized after counting a set number of power-on operations of a cathode ray tube
A CPU is designed so as to put a demagnetizing circuit in an operative state in accordance with a result of detecting, among other quantities or events, the number of operations to turn on a power...
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5689157 |
Cathode-ray tube display unit in which unwanted radiant electric field from face plate of cathode-ray tube is decreased
A cathode-ray tube display unit provided with a high voltage transformer for supplying high voltage to an anode of a cathode-ray tube, a deflection yoke having a horizontal deflection coil and a...
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5686007 |
Microwave oven magnetron with slit filament terminal
This invention relates to a magnetron of a microwave oven is disclosed including a lead for supporting a filament, and a filament terminal for electrically connecting the lead and a choke coil,...
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5677596 |
Plug with radiation screening element
A plug has a two-part housing accommodating a printed board with an electrical screening element for preventing propagation of electrical disturbing radiation during the operation of a gas...
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5675220 |
Power supply for vehicular neon light
A circuit for use in providing high voltage power to a neon bulb positioned on the vehicle utilizing the vehicle DC battery as the power source. The circuit includes an invertor, a transformer, and...
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5668433 |
Electrodeless fluorescent lamp having an insulative housing arrangement
An electrodeless fluorescent lamp comprises a sealed lamp vessel containing a fill capable of sustaining a discharge when suitably excited. The fill is excited by an RF electromagnetic field...
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5614789 |
Apparatus and method of reducing varying electrical fields in video display terminals
The present invention is concerned with a method and an arrangement relating to visual display units, preferably a picture tube (1), for reducing to a minimum the electrical alternating fields...
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5606223 |
Luminaire of reduced noise with magnetic field cancelled
A luminaire includes a lamp connected at one electrode to an ordinary current loop and at the other electrode to the other current loop which is branched into more than two which are extending...
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5604403 |
Color monitor magnetic shield
A compact color monitor device that utilizes active and passive magnetic shielding to eliminate the visible distortion of color displays due to externally-imposed magnetic fields. The color monitor...
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5594304 |
Portable fluorescent lamp for use in special applications
A fluorescent lamp for use in special applications includes an electrodeless envelope of glass or other light transmissive material carrying fluorescent material within the envelope. An RF energy...
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5576599 |
Low EMI high intensity discharge RF driven lamp
A high intensity discharge light source that uses a pseudo-random sequence generator to modulate an RF drive signal, and reduce electromagnetic interference (EMI) produced by the light source. The...
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5563476 |
Cathode ray tube display
A display comprising a cathode ray display tube (1) having an electromagnetic deflection yoke (2) is described. A pair of first deflection coils (7,6) are located symmetrically about the...
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5559401 |
Color display device comprising a color display tube and a delaying demagnetizing device
Color display tube with a shadow mask, a shield of a ferromagnetic material and a demagnetizing device having a set of demagnetizing coils. The demagnetizing device is provided with means for...
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5548183 |
Magnetic field immersion type electron gun
In a magnetic field immersion type electron gun for controlling an electron beam emitted by an electron gun (51) with the use of an electric lens (56) and a magnetic field lens formed by permanent...
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5539283 |
Discharge light source with reduced magnetic interference
A simple and effective technique for reducing an external magnet flux emitted from a driven inductor surrounded by an ionizable gaseous medium. This technique includes surrounding the inductor with...
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5537004 |
Low frequency electron cyclotron resonance plasma processor
A plasma processor includes a cylindrical processing chamber storing a semiconductor wafer to be processed, a slot antenna, wound around the outside of a peripheral wall of the processing chamber,...
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5510677 |
Method for correcting the effect of terrestrial magnetism on electron beam tracking
A method and apparatus for correcting the tracking of an electron beam which includes the steps of generating a supplemental magnetic field, generating a reverse magnetic field and removing the...
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5508588 |
Television startup current regulation
A television receiver has a switched mode power supply controller, which may be deflection synchronized, which produces pulses in a power transformer. To power the controller during startup, before...
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5485056 |
Monitoring device
In a monitoring device which forms a display image by using a cathode ray tube, leakage of electric field from the front side of the cathode ray tube is diminished with a simple construction. A...
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5469122 |
Deflection yoke
A deflection yoke has an induction coil wrapped about its ferrite core at an angle of from 0 to 70 degrees from the horizontal axis of the deflection yoke to supply current to a leakage...
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5463268 |
Magnetically shielded high voltage electron accelerator
The high voltage electrostatic accelerator of this invention has spark arrester rings which form magnetic shield elements around an acceleration tube and which together with mu-metal rings between...
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5459445 |
Electromagnetic wave reduction device
The present invention is a device to reduce the electromagnetic waves generated by electric appliances with surface displays including but not limited to computer monitors and televisions. Further,...
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5451840 |
Cathode-ray tube providing protection from alternating electric fields
Human bodies are shielded from an alternating electric field radiated from a deflection yoke of a cathode-ray tube device to prevent the alternating electric field from adversely affecting the...
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5449975 |
Method and arrangement for reducing electrical alternating fields generated in the surroundings of a display unit
The invention relates to a method and arrangement for reducing to a minimum the electrical alternating fields generated in the surroundings of a visual display unit (1). The visual display unit...
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5438235 |
Electrostatic shield to reduce wall damage in an electrodeless high intensity discharge lamp
An electrostatic shield is provided between the induction coil and the arc tube of an electrodeless HID lamp. In one embodiment, the shield is a transparent glass cylinder coated with a thin,...
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5432492 |
Deflection yoke apparatus with auxiliar coils to compensensate magnetic leakage
A deflection yoke apparatus has a pair of horizontal and a pair of vertical deflection coils, a coil separator therebetween, and a funnel-shaped deflection core which provides a magnetic path for...
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5432411 |
Electric field emission reduction apparatus
The present electrical apparatus comprises an antenna for directing towards an electric field source to detect the electric field (E) to be reduced. The antenna is connected to amplifier for...
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