Combined Cathode Ray Tube And Circuit Element Structure Patents (Class 315/3)
  • Patent number: 10027122
    Abstract: The present invention provides a high voltage regulated DC power supply with full range 24 pulse input for ripple free output for high power RF amplifier, comprising: full range 24 pulse 3 phase 11 kV input system configured to provide uncontrolled low voltage DC bus, low input harmonics and high input power factor; a plurality of DC-DC power modules having their output connected in a series and coupled to the said DC bus voltage; each power module comprising a DC source, an inverter bridge IGBTs operating at predefined duty cycle and staggered to reduce the output ripple and output stored energy; and a combination of feed forward and feedback control circuit adapted to regulate the variations in the input line voltage and the variation in output at various load current to finally obtain ripple free high voltage output.
    Type: Grant
    Filed: August 2, 2016
    Date of Patent: July 17, 2018
    Assignee: THE SECRETARY, DEPARTMENT OF ATOMIC ENERGY
    Inventor: Manmath Kumar Badapanda
  • Patent number: 9966012
    Abstract: An image display apparatus according to the present invention, includes a light emitter, a first panel configured to transmit light emitted from the light emitter, a second panel configured to transmit light transmitted through the first panel, and a controller configured to control emission brightness of the light emitter and at least one of transmittance of the first panel and transmittance of the second panel, based on input image data.
    Type: Grant
    Filed: November 25, 2015
    Date of Patent: May 8, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hironobu Hoshino
  • Patent number: 9952513
    Abstract: An undulator for a free electron laser includes a pipe for an electron beam and one or more periodic magnetic structures extending axially along the pipe. Each periodic magnetic structure includes a plurality of magnets and a plurality of passive ferromagnetic elements, the plurality of magnets being arranged alternately with the plurality of passive ferromagnetic elements in a line extending in an axial direction. Each of the plurality of magnets is spatially separated from the pipe, and each of the passive ferromagnetic elements extends radially from an adjacent magnet towards the pipe. A spacer element may be provided between the magnets and the pipe to provide radiation shielding for the magnets and/or cooling for the pipe.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: April 24, 2018
    Assignee: ASML NETHERLANDS B.V.
    Inventors: Andrey Alexandrovich Nikipelov, Johannes Antonius Gerardus Akkermans, Leonardus Adrianus Gerardus Grimminck, Erik Roelof Loopstra, Michael Jozef Mathijs Renkens, Adrian Toma, Han-Kwang Nienhuys
  • Patent number: 9819320
    Abstract: A coaxial amplifier having at least one electron beam is provided. The amplifier may include a conductive rod, a plurality of parallel discs on the rod, a cathode array for producing at least one electron beam. When a plurality of electron beams are formed they are arranged in an annular configuration around said rod and disks, and directed along said rod and coaxially thereof. A first waveguide may apply electromagnetic wave energy to one end of said disc and rod assembly to induce propagation of said energy along said assembly. A second waveguide may extract the amplified electromagnetic energy from the other end of the disc and rod assembly.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: November 14, 2017
    Assignee: The Government of the United States of America as Represented by the Secretary of the Air Force
    Inventors: Brad W. Hoff, David M. French
  • Patent number: 9697979
    Abstract: A microwave wave generator device with oscillating virtual cathode, with axial geometry, includes at least one first reflector positioned in a cylindrical waveguide downstream of a thin anode, positioned at the entrance of the cylindrical waveguide, between a cathode and the cylindrical waveguide. The device further includes a tight magnetic ring of width (LM) along the longitudinal axis (z), positioned externally around the cylindrical waveguide, between the thin anode and the first reflector.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: July 4, 2017
    Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
    Inventors: Stephanie Champeaux, Philippe Gouard
  • Patent number: 9666145
    Abstract: The present disclosure provides a method for controlling brightness compensation for pixel units of a display device, comprising: driving white subpixels in the pixel units to compensate the pixel units for the brightness according to predetermined pixel units whose brightness is to be compensated for in the display device and compensating grayscale voltages corresponding to the brightness of the pixel units to be compensated.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: May 30, 2017
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Huijuan Chen, Hyungkyu Kim, Duo Zhang, Yang Chen
  • Patent number: 9640703
    Abstract: In an avalanche photodiode provided with a substrate including a first electrode and a first semiconductor layer, formed of a first conductivity type, which is connected to the first electrode, the configuration is in such a way that, at least an avalanche multiplication layer, a light absorption layer, and a second semiconductor layer having a bandgap that is larger than that of the light absorption layer are layered on the substrate; a second conductivity type conductive region is formed in the second semiconductor layer; and the second conductivity type conductive region is arranged so as to be connected to a second electrode. With the foregoing configuration, an avalanche photodiode having a small dark current and a high long-term reliability can be provided with a simple process.
    Type: Grant
    Filed: October 25, 2004
    Date of Patent: May 2, 2017
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Eiji Yagyu, Eitaro Ishimura, Masaharu Nakaji
  • Patent number: 9526157
    Abstract: A light source apparatus includes a discharge lamp including a light-emitting container having a cavity in which a discharge medium is enclosed, and a pair of electrodes disposed such that respective tip portions thereof oppose each other in the cavity, and a driving unit that supplies a driving current to the pair of electrodes. The driving current is generated by modulating amplitude of alternating current having a frequency not lower than 1 kHz and not higher than 10 GHz, such that a first section and a second section in which the amplitude is smaller than in the first section are alternately repeated.
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: December 20, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Junichi Suzuki, Satoshi Kito
  • Patent number: 9386681
    Abstract: An oscillating field particle accelerator and a method of reducing beam divergence in the particle accelerator are provided. The particle accelerator includes an intermediate electrode disposed within the particle accelerator between a source of charged particles and a second electrode of the particle accelerator. The charged particles are exposed to a first electric field extending between the source and the intermediate electrode prior to being exposed to a second electric field extending between the intermediate electrode and the second electrode. The magnitude of the first electric field is less than the peak magnitude of the second electric field, and may be less than or equal to a minimum magnitude of the second electric field occurring during a phase acceptance time period associated with a phase acceptance of the particle accelerator. The accelerated charged particles emerge from the second electrode as a non-diverging or reduced divergence particle beam.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: July 5, 2016
    Assignee: Schmor Particle Accelerator Consulting Inc.
    Inventor: Paul Schmor
  • Patent number: 9177748
    Abstract: A high power RF device has an electron beam cavity, a modulator, and a circuit for feed-forward energy recovery from a multi-stage depressed collector to the modulator. The electron beam cavity include a cathode, an anode, and the multi-stage depressed collector, and the modulator is configured to provide pulses to the cathode. Voltages of the electrode stages of the multi-stage depressed collector are allowed to float as determined by fixed impedances seen by the electrode stages. The energy recovery circuit includes a storage capacitor that dynamically biases potentials of the electrode stages of the multi-stage depressed collector and provides recovered energy from the electrode stages of the multi-stage depressed collector to the modulator. The circuit may also include a step-down transformer, where the electrode stages of the multi-stage depressed collector are electrically connected to separate taps on the step-down transformer.
    Type: Grant
    Filed: February 6, 2014
    Date of Patent: November 3, 2015
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventor: Mark A. Kemp
  • Patent number: 9146103
    Abstract: An optical apparatus for ranging and communication in free space comprises a rangefinder comprising a device for transmitting an optical signal to a target and a device for receiving the signals backscattered by the target. A system for optical communication in free space comprises a device for transmitting an optical signal to a remote optical receiving device. The transmitting device of the rangefinder and transmitting device of the communication system is a transmitting device common to the rangefinder and communication system and transmitting pulses of peak power greater than 50 W and shape factor less than 0.01 or a modulated continuous signal of peak power less than 10 W and shape factor equal to approximately 0.5 and the apparatus comprises a supervisor controlling the common transmitting device according to two modes, the pulse mode to perform the ranging function, or the modulated continuous mode to perform the optical communication function.
    Type: Grant
    Filed: November 18, 2011
    Date of Patent: September 29, 2015
    Assignee: Thales
    Inventor: Pascal Rousseau
  • Patent number: 9041288
    Abstract: A stabilized high-voltage power supply is disclosed, having a general setup similar to a pulse-step modulator. The power supply comprises a plurality of DC power modules (40) having their outputs connected in a series configuration. Each power module comprises a DC voltage source (41), a DC-DC converter (42), and an output switching circuit (43). The total output voltage of the power supply is regulated by regulating the DC link voltage at the output of each power module. This is achieved by an appropriate feedback control circuit driving the DC-DC converter of each power module. In this manlier, low output ripple and a rapid response to changes in output current can be achieved. The power supply may be used, e.g., as the cathode power supply of a gyrotron.
    Type: Grant
    Filed: October 9, 2012
    Date of Patent: May 26, 2015
    Assignee: AMPEGON AG
    Inventor: Michael Bader
  • Patent number: 8928253
    Abstract: The invention relates to a method for generating light with a desired light color by using at least one light-emitting diode emitting red r-LED, at least one light-emitting diode emitting green g-LED, at least one light-emitting diode emitting blue b-LED and at least one light-emitting diode emitting white w-LED. In order to improve the CRI value, according to the invention it is proposed that weighting values ascertained according to the RGB algorithm and further weighting values ascertained according to the RGBW algorithm be combined together by using a correction factor.
    Type: Grant
    Filed: February 14, 2013
    Date of Patent: January 6, 2015
    Assignee: Diehl Aerospace GmbH
    Inventors: Swen Bergeler, Yvonne Bodschwinna-Kangarakis, Frank Schmid
  • Patent number: 8853944
    Abstract: Electron sources for a cathodoluminescent lighting system are disclosed. An electron source is a broad-beam reflecting-type electron gun having a cathode for emitting electrons and a reflector and/or secondary emitter electrode and no grids. An alternative electron gun has a cathode having a heater welded to a disk, the disk having an emissive surface on a side facing a dome-shaped defocusing grid and an anode. A lighting system incorporating the electron sources has an envelope with a transparent face, an anode with a phosphor layer to emit light through the face and a conductor layer. The system also has a power supply for providing from five to thirty thousand volts of power to the light emitting device to draw electrons from cathode to anode and excite a cathodoluminescent phosphor, and the electrons transiting from cathode to anode are essentially unfocused. A power-factor-corrected embodiment is also disclosed.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: October 7, 2014
    Assignee: Vu1 Corporation
    Inventors: Richard N. Herring, Charles E. Hunt, Thomas Skupien, Tomas Hasilik, Viktor Jelinek, Bernard K. Vancil
  • Patent number: 8749127
    Abstract: A device for lighting a room is described. The device has an envelope with a transparent face, the face having an interior surface coated with a cathodoluminescent screen and a thin, reflective, conductive, anode layer. There is a broad-beam electron gun mounted directly to feedthroughs in a base of the envelope with a heated, button-on-hairpin, cathode for emitting electrons in a broad beam towards the anode, and a power supply mounted on the feedthroughs at the base of the envelope that drives the cathode to a multi-kilovolt negative voltage. A two-prong snubber serves as an anode contact to permit the power supply to drive the anode to a voltage near ground. A method of manufacture of the anode uses a single step deposition and lacquering process followed by a metallization using a conical-spiral tungsten filament coated with aluminum by a thermal spray coating process.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: June 10, 2014
    Assignee: Vu1 Corporation
    Inventors: Richard Herring, Charles E. Hunt, Bernard K. Vanch, Tomas Hasilik, Viktor Jelinek
  • Publication number: 20140097747
    Abstract: A stabilized high-voltage power supply is disclosed, having a general setup similar to a pulse-step modulator. The power supply comprises a plurality of DC power modules (40) having their outputs connected in a series configuration. Each power module comprises a DC voltage source (41), a DC-DC converter (42), and an output switching circuit (43). The total output voltage of the power supply is regulated by regulating the DC link voltage at the output of each power module. This is achieved by an appropriate feedback control circuit driving the DC-DC converter of each power module. In this manlier, low output ripple and a rapid response to changes in output current can be achieved. The power supply may be used, e.g., as the cathode power supply of a gyrotron.
    Type: Application
    Filed: October 9, 2012
    Publication date: April 10, 2014
    Applicant: PL TECHNOLOGIES AG
    Inventor: Michael Bader
  • Patent number: 8294367
    Abstract: Electron sources for a cathodoluminescent lighting system are disclosed. An electron source is a broad-beam reflecting-type electron gun having a cathode for emitting electrons and a reflector and/or secondary emitter electrode and no grids. An alternative electron gun has a cathode having a heater welded to a disk, the disk having an emissive surface on a side facing a dome-shaped defocusing grid and an anode. A lighting system incorporating the electron sources has an envelope with a transparent face, an anode with a phosphor layer to emit light through the face and a conductor layer. The system also has a power supply for providing from five to thirty thousand volts of power to the light emitting device to draw electrons from cathode to anode and excite a cathodoluminescent phosphor, and the electrons transiting from cathode to anode are essentially unfocused. A power-factor-corrected embodiment is also disclosed.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: October 23, 2012
    Assignee: Vu1 Corporation
    Inventors: Richard N. Herring, Charles E. Hunt, Thomas Skupien, Tomas Hasilik, Viktor Jelinek, Bernard K. Vancil
  • Patent number: 8212481
    Abstract: A voltage control apparatus used for an electron tube or a power supply apparatus includes a detecting circuit for detecting current flowing through a helix electrode, a voltage-limiting circuit for controlling a potential difference between the helix electrode and the anode electrode based on a predetermined voltage level; and a switch for switching based on an output from the detecting circuit. The switch connects the helix electrode and the anode electrode through the voltage-limiting circuit, or causes a short circuit between the helix electrode and the anode electrode.
    Type: Grant
    Filed: March 2, 2009
    Date of Patent: July 3, 2012
    Assignee: NEC Microwave Tube, Ltd
    Inventor: Yukihira Nakazato
  • Patent number: 8174200
    Abstract: A piezoelectric transformer driving device including: an oscillator; a frequency-divider outputting a pulse by dividing a clock signal from the oscillator by a frequency-divide ratio received thereto; a switching element driven by the pulse and intermittently applying a voltage to a primary side of a piezoelectric transformer; a frequency-divide ratio instructing unit holding a frequency-divide ratio instruction value of a real number having an integer part and an fractional part; a binarization unit binarizing the frequency-divide ratio instruction value into two different integer frequency-divide ratios and selectively outputting the frequency-divide ratios. The binarization unit adjusts an appearance ratio of the frequency-divide ratios such that an average of the frequency-divide ratios output from the binarization unit is equal to an average of the frequency-divide ratio instruction value.
    Type: Grant
    Filed: January 27, 2010
    Date of Patent: May 8, 2012
    Assignee: Oki Data Corporation
    Inventors: Toru Kosaka, Masao Yaji, Akira Hagiwara
  • Publication number: 20120001543
    Abstract: A light source includes a hot electron source comprising a cathode that generates an electron beam and an anode comprising a germanium containing material positioned adjacent to the cathode. The anode is biased so that the electron beam accelerates towards the anode where some electrons are absorbed and then relax to both direct energy bands and indirect energy bands causing stimulation of low energy electrons from the indirect energy band to the direct energy band, thereby creating electroluminescence.
    Type: Application
    Filed: June 29, 2011
    Publication date: January 5, 2012
    Applicant: Photonic Systems, Inc.
    Inventors: Jianxiao Chen, Charles H. Cox
  • Patent number: 7893620
    Abstract: An apparatus that includes a traveling-wave tube having an electron gun having a cathode. The apparatus also includes a first power supply for establishing a first electric potential between the cathode and an anode and for providing an operational current to the cathode to generate a beam of electrons. The apparatus also includes a slow-wave structure having a passage through which the beam of electrons passes. The apparatus also includes a second power supply for providing a voltage to a beam focusing electrode to establish an electric potential between the cathode and the beam focusing electrode. The apparatus also includes a switching module coupled to the first power supply and the second power supply, the switching module providing a current path between the cathode and the beam focusing electrode, wherein the current path is disabled when a biasing current is below a predetermined level.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: February 22, 2011
    Assignee: L-3 Communications Electron Technologies, Inc.
    Inventor: David Eric Lewis
  • Patent number: 7842907
    Abstract: A microwave generator (10) having a hollow central electrode (12) with a front face including hollow emmission element (18), and having an outer electrode (14), which coaxially surrounds the central electrode (12) along an axially extending resonator section (16). The two electrodes (12, 14) define a spark gap (36) and are connected to a high-voltage source (38). An ultracompact microwave generator (10) is implemented by the high-voltage source (38) being arranged in the hollow central electrode (12) of the microwave generator (10) rather than on the outside thereof.
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: November 30, 2010
    Assignee: Diehl BGT Defence GmbH Co., KG
    Inventors: Robert Stark, Jürgen Urban
  • Patent number: 7750572
    Abstract: The invention relates to a microwave power tube consisting of an electron gun comprising a cathode that generates an electron beam in a microwave structure of the tube, and a collector for collecting electrons from the beam. In addition, the tube comprises a magnetic device for spreading the beam in the collector, which generates a periodic amplitude-modulated magnetic spread field Bblm. The invention is suitable for microwave power tubes.
    Type: Grant
    Filed: October 24, 2005
    Date of Patent: July 6, 2010
    Assignee: Thales
    Inventors: David Bariou, Christophe Lievin
  • Publication number: 20100134007
    Abstract: A system to regulate gyrotron power is configured to raise the filament voltage of a gyrotron to a standby voltage, then set the filament voltage to the normal standby voltage plus a current offset voltage before pulsing the gyrotron. The system is further configured to increase the filament voltage to a boost voltage that is higher than the standby voltage, thereby inducing a temperature increase in the cathode that offsets the cooling effect of radiating. The system is also configured to analyze a beam power of the gyrotron and adjust the filament voltage to bring a beam current within a range, and reduce the filament offset to zero such that the filament voltage is equal to the standby voltage.
    Type: Application
    Filed: December 3, 2008
    Publication date: June 3, 2010
    Inventors: Larry Andrew Booker, John Walter Gerstenberg
  • Patent number: 7683551
    Abstract: Discharge factors existing on a surface of an electrode or an insulator forming an electron gun are removed efficiently and effectively, thus simply and easily enhancing the withstand voltage property of the electron gun. A conditioning processing device of an electron gun is provided with a voltage supply section, a voltage adjusting section for adjusting the output voltage of the voltage supply section, and a current detection section for detecting a leakage current flowing between the electrodes of the electron gun. Further, there are attached a vacuum exhaust section for adjusting the inside of the electron gun in a reduced pressure condition and a pressure detection section.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: March 23, 2010
    Assignee: NuFlare Technology, Inc.
    Inventor: Nobuo Miyamoto
  • Publication number: 20090218948
    Abstract: A voltage control apparatus used for an electron tube or a power supply apparatus includes a detecting circuit for detecting current flowing through a helix electrode, a voltage-limiting circuit for controlling a potential difference between the helix electrode and the anode electrode based on a predetermined voltage level; and a switch for switching based on an output from the detecting circuit. The switch connects the helix electrode and the anode electrode through the voltage-limiting circuit, or causes a short circuit between the helix electrode and the anode electrode.
    Type: Application
    Filed: March 2, 2009
    Publication date: September 3, 2009
    Inventor: Yukihira NAKAZATO
  • Patent number: 7385354
    Abstract: A multi-beam klystron apparatus is disclosed. A radio-frequency interaction unit pole piece is arranged between a main magnetic field generator and an output-side magnetic field generator. The magnetic circuit formed in the neighborhood of an output cavity of a radio-frequency interaction unit is separated from the magnetic circuit of the main magnetic field generator by the radio-frequency interaction unit pole piece. The output-side magnetic field generator increases the axial magnetic flux density in the neighborhood of the output cavity without curving the electron beams and thus prevents the spread of the electron beams in the neighborhood of the output cavity.
    Type: Grant
    Filed: November 30, 2006
    Date of Patent: June 10, 2008
    Assignees: Toshiba Electron Tubes & Devices Co., Ltd., Kabushiki Kaisha Toshiba
    Inventor: Setsuo Miyake
  • Patent number: 7348569
    Abstract: A method and apparatus for accelerating charged particles are disclosed, wherein the method comprises using at least a transverse component of a temporally and spatially shaped electromagnetic field to accelerate one or more charged particles.
    Type: Grant
    Filed: June 16, 2005
    Date of Patent: March 25, 2008
    Assignee: Massachusetts Institute of Technology
    Inventors: Thomas Feurer, Darius H. Torchinsky, Keith A. Nelson
  • Publication number: 20080018255
    Abstract: A magnet configuration for a power microwave tube with a resonant cavity comprises a permanent magnet (110) with an axis-aligned through-bore (135) of sufficient size to contain the resonant cavity. The permanent magnet has an inner chamber (140) that is centered on the axis (130) with opposite magnet poles aligned along the axis. The magnet configuration further comprises an electromagnet coil (120) fitting in the chamber and encircling the axis such that the coil produces a magnetic field that reinforces the magnetic field from the permanent magnet. An optional protrusion (125) spanning the through-bore narrows an air gap between the poles. The method provides a magnetic field in a power microwave generator by combining a permanent magnet with an electromagnet in accordance with the magnet configuration and energizes the electromagnetic coil, which may be by pulsing the coil current.
    Type: Application
    Filed: July 17, 2007
    Publication date: January 24, 2008
    Inventor: Larry R. Barnett
  • Patent number: 7315113
    Abstract: A conductive film isolated from an inner conductive film is formed on an inner wall of a neck. Assuming that, among a plurality of focusing electrodes constituting an electron gun, a position in a tube axis direction of an end on an anode side of an anode-side focusing electrode placed at a position closest to the anode side is P0; among electrodes supplied with substantially the same voltage as that of the anode-side focusing electrode and arranged continuously from the anode-side focusing electrode, a position in the tube axis direction of an end on a beam generating portion side of an electrode placed at a position closest to the beam generating portion side is P1; in the tube axis direction, a position of an end on the beam generating portion side of the conductive film is PL1 and a position of an end on the panel side of the conductive film is PL2, the position P0 is placed between the position PL1 and the position PL2.
    Type: Grant
    Filed: October 11, 2005
    Date of Patent: January 1, 2008
    Assignee: Matsushita Toshiba Picture Display Co., Ltd.
    Inventor: Koji Nishiyama
  • Patent number: 7173364
    Abstract: Disclosed are a cathode ray tube and a funnel therefore. An anode button is installed on the funnel to meet the condition of 2.8?T, in which T is a B/A ratio, A is a distance on a central axis of the funnel between a seal edge face of the funnel, which abuts a panel, and the anode button, and B is a distance on the central axis of the funnel between the anode button and a neck seal of the funnel, which is positioned at the opposite side of the seal edge face in the funnel. According to this invention, it is possible to prevent mechanical interference and electrical interference, such as distortion of deflection magnetic field, caused depending on the installation position of the anode button on the funnel.
    Type: Grant
    Filed: December 27, 2005
    Date of Patent: February 6, 2007
    Assignee: LG. Philips Displays Korea Co., Ltd.
    Inventor: Ryo Hyang Kim
  • Patent number: 7042174
    Abstract: A method and circuit for generating independent top and bottom corner correction using a single fourth order function is described. The top and bottom corner correction signal may be included in an east-west corrected voltage to correct an asymmetry of a picture with respect to a horizontal axis and a vertical axis of the picture. Two switch signals based on a ramping voltage, which is used to sweep an electron beam, and two clock signals control a sample-and-hold circuit. The sample-and-hold circuit is arranged to sample a fourth order voltage during a top portion and a bottom portion of the ramping voltage and provide two independent correction voltages Vout—top and Vout—bottom. The correction voltages are then provided for top and bottom corner correction to the east-west corrected voltage.
    Type: Grant
    Filed: August 9, 2004
    Date of Patent: May 9, 2006
    Assignee: National Semiconductor Corporation
    Inventor: Charles Guan
  • Patent number: 6998782
    Abstract: Based, in part, on an input video signal, an autobias circuit generates red, green, and blue channel video signals, which are received by external drivers to drive cathodes in a CRT. The autobias circuit also provides gain and bias control signals based on a sense current. The external drivers generate the sense current such that the sense current is proportional to the sum of the beam currents flowing from the cathodes. The sense current has an error caused by current flowing through external recharge resistors. A correction current (Ivideo) is subtracted from the sense current to compensate. The correction current is generated according to the equation Ivideo=(Vs/Rkin)*[(Vref/Rext)/(Vref/Rin)], where Vkin and Rin are matched internal monolithic resistors, Rext is the resistance of another external resistor that is matched to the external recharge resistors, and Vs is the sum of the red, green, and blue channel video signals.
    Type: Grant
    Filed: August 18, 2004
    Date of Patent: February 14, 2006
    Assignee: National Semiconductor Corporation
    Inventor: Charles Guan
  • Patent number: 6940229
    Abstract: With respect to a highly flat glass bulb for cathode ray tube having an effective screen diameter along a diagonal axis of a glass panel 10 of more than or equal to 500 mm, and an average radius of curvature of an outer surface of a face portion of more than or equal to 10,000 mm, a ratio between a length h of a skirt portion 13 of the glass panel and a distance H in the tube axis direction from an edge surface portion where a funnel is sealed with the glass panel to a reference line is defined so as to fall within a predetermined range in relation to a deflection angle ? of the funnel representing substantial degree of divergence in the tube axis direction of the funnel, thereby achieving reduction of weight of the glass bulb while maintaining a certain mechanical strength, as well as suppressing breakage during frit seal heating process.
    Type: Grant
    Filed: May 5, 2003
    Date of Patent: September 6, 2005
    Assignee: Nippon Electric Glass Co., Ltd.
    Inventor: Masaya Kyono
  • Patent number: 6894732
    Abstract: A display apparatus has a cathode ray tube bulb which includes a panel displaying a picture thereon, a funnel combined with the panel, and a neck connected to the funnel. The display apparatus further comprises an electron gun unit which includes an electron gun main body inserted into the neck and a boss part protruding from the neck at a rear part of the electron gun main body and having a plurality of pins disposed therearound, and a video unit which includes a video PCB disposed parallel to the axis of the neck and a boss holder vertically provided on the video PCB and combined with the boss part so as to transmit a video signal from the video PCB to the electron gun unit. With this configuration, space for installation of the video PCB is minimized, and the video unit is not easily separated from an electron gun unit.
    Type: Grant
    Filed: November 30, 2001
    Date of Patent: May 17, 2005
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kwey-Hyun Kim, You-Sub Lee
  • Publication number: 20040217711
    Abstract: Intensive microwave radiation in particular of great band width and energy over a relatively long period of time in the form of long pulse packets with a high pulse repetition frequency and a very high frequency spectrum can be achieved if microwave irradiation is effected during the discharge of a capacitive high-voltage generator (35) by way of the antenna (26) into a series of successive capacitors (13) to be connected in parallel. They are preferably constructed in the form of a concentric stack, connected to the antenna (26), of which the outer electrodes (16) which are at a reference potential are in the form of a continuous tube within which annular electrodes (15) are disposed on a carrier (20) in axially spaced relationship with each other in such a way that at the same time they act as the electrodes of arc switches (39) for successively switching on subsequent capacitors (13).
    Type: Application
    Filed: March 26, 2004
    Publication date: November 4, 2004
    Inventors: Jurgen Urban, Josef Dommer, Helmut Hofmann, Geoffrey Staines
  • Patent number: 6771023
    Abstract: A system for regulating beam current in a cathode ray tube. The system includes test signal timing and pulse generation logic for outputting test signals operable to stimulate a cathode ray tube at two voltage levels. The system further includes a circuit that inputs the test signal timing and determines correction signals based on signals derived from the cathode in response to stimulating the cathode ray tube at the two voltage levels. The correction signals may include a gain correction signal, a bias correction signal or both. The gain correction signal modifies a signal output to a gain driver that may be AC coupled to the cathode. The bias correction signal output to a clamping circuit coupled to the cathode.
    Type: Grant
    Filed: December 18, 2002
    Date of Patent: August 3, 2004
    Assignee: National Semiconductor Corporation
    Inventors: Charles Guan, Andrew Morrish
  • Patent number: 6756734
    Abstract: Expressing a perveance of an electron gun to be determined by a form of the electron gun as P&mgr;, a voltage to be impressed on an accelerating electrode Va and a beam current Ib, voltage Va which satisfies the following expression, Ib<P&mgr;×Va3/2 is impressed on the accelerating electrode. Further, the electric potential of the accelerating electrode is maintained at the highest level of all electrodes in the electron tube at all times.
    Type: Grant
    Filed: September 24, 2001
    Date of Patent: June 29, 2004
    Assignee: NEC Microwave Tube, Ltd.
    Inventors: Shunji Tsuida, Hironori Imura, Hideo Makishima
  • Patent number: 6703783
    Abstract: A video imaging apparatus comprises first and second cathode-ray tubes, each having an ultor electrode and a focus electrode. A power supply generates an ultor voltage, which may have a fluctuating voltage component produced by beam current variations, and which is coupled to first and second ultor electrodes of the first and second cathode-ray tubes. A high voltage amplifier generates a dynamic focus voltage component at a frequency related to a deflection frequency. A combining network combines the fluctuating voltage component and the dynamic focus voltage component to develop a combined, dynamic focus voltage. The combined, dynamic focus voltage is coupled to each of the first and second focus electrodes for developing from the combined, dynamic focus voltage each of a first dynamic focus voltage at the first focus electrode and a second dynamic focus voltage at the second focus electrode.
    Type: Grant
    Filed: January 10, 2003
    Date of Patent: March 9, 2004
    Assignee: Thomson Licensing S.A.
    Inventor: John Barrett George
  • Patent number: 6670620
    Abstract: An electron gun, having an electron source, a Wehnelt electrode, and acceleration electrodes, includes a control device for changing a field distribution formed by a first acceleration electrode of the acceleration electrodes to control characteristics of a final cross-over formed, by electrons from a first cross-over, at the final stage of the electric gun. The first cross-over is performed when the electrons emitted from the electron source are focused by the field distribution formed by the electron source, the Wehnelt electrode, and a second acceleration electrode of the acceleration electrodes.
    Type: Grant
    Filed: December 16, 1999
    Date of Patent: December 30, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventor: Masahiko Okunuki
  • Patent number: 6646381
    Abstract: A main lens of an electron gun assembly comprises a sixth grid, a seventh grid, an eighth grid, and a ninth grid. An asymmetric lens section is created between a fifth grid and the sixth grid on a cathode side of the main lens. The asymmetric lens section has such asymmetry that lens functions of the asymmetric lens section acting on the electron beams are different between the horizontal direction and the vertical direction, and has a lens power varying in synchronism with the deflection of the electron beams. In this asymmetric lens, the asymmetry for a center beam differs from that for side beams.
    Type: Grant
    Filed: October 12, 2001
    Date of Patent: November 11, 2003
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takahiro Hasegawa, Junichi Kimiya, Shunji Ookubo, Hiroyuki Oda
  • Publication number: 20030197470
    Abstract: With respect to a highly flat glass bulb for cathode ray tube having an effective screen diameter along a diagonal axis of a glass panel 10 of more than or equal to 500 mm, and an average radius of curvature of an outer surface of a face portion of more than or equal to 10,000 mm, a ratio between a length h of a skirt portion 13 of the glass panel and a distance H in the tube axis direction from an edge surface portion where a funnel is sealed with the glass panel to a reference line is defined so as to fall within a predetermined range in,relation to a deflection angle &thgr; of the funnel representing substantial degree of divergence in the tube axis direction of the funnel, thereby achieving reduction of weight of the glass bulb while maintaining a certain mechanical strength, as well as suppressing breakage during frit seal heating process.
    Type: Application
    Filed: May 5, 2003
    Publication date: October 23, 2003
    Applicant: NIPPON ELECTRIC GLASS CO., LTD.
    Inventor: Masaya Kyono
  • Publication number: 20030178952
    Abstract: A cold cathode-ray tube driving method by using a voltage with fixed phase shift to drive each cold cathode-ray tube of a backlighting module in a large size LCD; a circuit with phase excursion formed by the voltage so to provide a fixed phase shift between abutted loads to supply a highly consistent power source and to effectively control electricity leakage due to unstable phase shift between abutted loads.
    Type: Application
    Filed: March 22, 2002
    Publication date: September 25, 2003
    Inventors: Kazuhiro Miyashita, Yen-Chuan Chu, Ming-Hsiang Yu
  • Patent number: 6624559
    Abstract: There is provided a cathode ray tube capable of displaying high quality images by suppressing eddy current from occurring and by realizing the velocity modulation. A cylindrical focusing electrode is divided into first cylindrical focusing electrode 4B and second cylindrical focusing electrode 4T and the gap between the both electrodes formed and divided by optimizing the length of the second cylindrical focusing electrode 4T in the tube axial direction is enlarged substantially to increase the infiltration of the velocity modulating magnetic field to the non-electric space of the focusing electrode 4. An electrode 4a having the equal potential with the focusing electrode 4 is disposed at the gap to suppress eddy current from being generated.
    Type: Grant
    Filed: April 3, 2001
    Date of Patent: September 23, 2003
    Assignees: Hitachi Ltd, Hitachi Electronic Devices
    Inventors: Nobuyuki Suzuki, Toshio Nakayama, Yasuo Tanaka, Akiyoshi Tobe
  • Patent number: 6614159
    Abstract: A cathode ray tube has a three-gun type electron gun. The electron gun includes a cathode, a G1 electrode, a G2 electrode aligned in line in this order, the G1 electrode and the G2 electrode having beam-passing holes formed therein. A supporting member supports the cathode in position. A GM electrode is added between the G1 and G2 electrodes and has a beam-passing hole smaller than the holes formed in the G1 electrode and the G2 electrode. The supporting member and the G1 electrode are formed with measurement holes. The G2 electrode may also be formed with a measurement hole therein. A measurement element is inserted through the measurement holes to measure a distance between the G1 electrode and the G2 electrode, and a distance between the GM electrode and the G2 electrode.
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: September 2, 2003
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Tetsuo Funakura
  • Publication number: 20030160566
    Abstract: Disclosed is a structure of a an electron gun for a color cathode ray tube capable of reducing a drive voltage by creating an optimum relation among a cathode, a first electrode, and a second electrode mounted in the electron gun, and preventing degradation in responsiveness to input signals on a high-resolution screen and a focus characteristic.
    Type: Application
    Filed: February 27, 2003
    Publication date: August 28, 2003
    Inventors: Jin Yeal Choi, Jun Ho Bae
  • Patent number: 6605898
    Abstract: A CRT device with an electron gun provided therein includes control means for controlling voltages applied to a cathode and a control electrode constituting the electron gun. The control means exerts control on each electrode voltage so that the difference between the cutoff voltage of the cathode and the voltage of the control electrode is greater when the luminance level of a luminance signal separated from picture signal is higher, thereby minimizing a spot diameter.
    Type: Grant
    Filed: January 15, 2002
    Date of Patent: August 12, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd
    Inventors: Masahide Yamauchi, Kazunori Ohta, Masahiko Sukeno, Takashi Itoh
  • Patent number: 6593697
    Abstract: The invention relates to a resistor assembly for dividing an applied voltage into an intermediate voltage being below the applied anode voltage in a cathode ray tube. The resistor assembly comprises an insulating substrate and a resistive voltage divider including a first and a second resistive layer provided on the insulating substrate, and an additional resistive network with a first network terminal and a second network terminal. The additional resistive network is coupled in series with the first resistive layer. Furthermore, the additional resistive network comprises first and second resistive portions which are releasably coupled to the network terminals via bridge connections. According to the invention, the first and second resistive portions have substantially different resistance values for selecting a predetermined resistance value from a range of resistance values of the additional resistive network.
    Type: Grant
    Filed: October 27, 2000
    Date of Patent: July 15, 2003
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Wilhelmus Albertus Maria Aarnink, Johan Cornelis Compter
  • Patent number: 6574248
    Abstract: A wiggler that, when used in a free electron laser, reduces the harmonicity of the light emitted from the free electron laser. In general, the reduced harmonicity is accomplished by making the magnetic field distribution of the wiggler to be sinusoidal, rather than like a square wave. The sinusoidal magnetic field distribution reduces the number of harmonics that can be used to approximate the magnetic field distribution of the wiggler, and thus reduces the harmonicity of the light produced by passing an electron beam through the wiggler. In a particular embodiment, the wiggler is composed of pieces or segments of permanent magnets that are arranged along an axis such that their magnetic orientations are perpendicular to the axis, and such that the magnetic field distribution along the axis is sinusoidal.
    Type: Grant
    Filed: November 22, 1999
    Date of Patent: June 3, 2003
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Herbert A. Leupold
  • Patent number: 6570331
    Abstract: A CRT socket includes interfitting vertical walls between first and second focusing pins. The presence of low dielectric constant air between the interfitted walls prevents the occurrence of corona currents between the two focusing terminal pins of a double focus tube and between a focusing terminal pin and a surrounding insulating resin wall. As necessary, insulating walls that also have at least a double-wall construction are formed as the side walls of focusing terminal pin housings that separate the focusing terminal pins from the outside. A gap of at least 1.0 mm is left between the ends of the focusing terminal pins and the side walls and bottoms of focusing terminal pin housings in the base portion.
    Type: Grant
    Filed: April 4, 2002
    Date of Patent: May 27, 2003
    Assignee: SMK Corporation
    Inventors: Hiroharu Arakawa, Atsushi Arai