Cathode Ray Tube Patents (Class 313/364)
  • Patent number: 11158540
    Abstract: Light-absorbing masks and methods of dicing semiconductor wafers are described. In an example, a method of dicing a semiconductor wafer including a plurality of integrated circuits involves forming a mask above the semiconductor wafer. The mask includes a water-soluble matrix based on a solid component and water, and a light-absorber species throughout the water-soluble matrix. The mask and a portion of the semiconductor wafer are patterned with a laser scribing process to provide a patterned mask with gaps and corresponding trenches in the semiconductor wafer in regions between the integrated circuits. The semiconductor wafer is plasma etched through the gaps in the patterned mask to extend the trenches and to singulate the integrated circuits. The patterned mask protects the integrated circuits during the plasma etching.
    Type: Grant
    Filed: May 26, 2017
    Date of Patent: October 26, 2021
    Assignee: Applied Materials, Inc.
    Inventors: Wenguang Li, James S. Papanu, Wei-Sheng Lei, Prabhat Kumar, Brad Eaton, Ajay Kumar, Alexander N. Lerner
  • Publication number: 20140055025
    Abstract: An electron gun cathode (104) is column shaped, and emits electrons by being heated. A holder (103), which covers the bottom and sides of the electron gun cathode, has electrical conductivity and holds the electron gun cathode, and is composed of a material that does not easily react with the electron gun cathode when in a heated state, is provided. The tip of the electron gun cathode (104) protrudes from the holder (103) so as to be exposed, and electrons are emitted from the tip toward the front by applying an electric field to the tip.
    Type: Application
    Filed: February 25, 2011
    Publication date: February 27, 2014
    Applicant: PARAM CORPORATION
    Inventor: Hiroshi Yasuda
  • Patent number: 8420416
    Abstract: In the present invention, disclosed is a method of manufacturing an organic electroluminescent element in which at least an anode, a light emission layer and a cathode are laminated, wherein at least one light emission layer possesses two kinds of light-emitting dopants, the method comprising the step of conducting a process in which the organic EL element is subjected to an annealing treatment after forming at least the anode, the at least one light emission layer and the cathode as an element structure. By the method of the present invention, a stably manufacturable organic electroluminescent element exhibiting high light emission efficiency and long lifetime is possible to be prepared, and a white light-emitting organic electroluminescent element is suitably prepared.
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: April 16, 2013
    Assignee: Konica Minolta Holdings, Inc.
    Inventors: Mitsuyoshi Naito, Tomoyuki Nakayama
  • Patent number: 8330344
    Abstract: An electron gun includes: an electron source; an accelerating electrode; an extraction electrode for extracting electrons from an electron emission surface of the electron source; a suppressor electrode for suppressing emission of electrons from a side surface of the electron source; and an electron beam converging unit for converging an electron beam of thermal field emission electrons emitted from the electron emission surface by applying an electric field to the electron emission surface. The electron beam converging unit is an electrostatic lens electrode which is placed between the extraction electrode and the accelerating electrode and having an opening portion in its center. A voltage is applied to the electrostatic lens electrode to converge the electron beam.
    Type: Grant
    Filed: September 28, 2009
    Date of Patent: December 11, 2012
    Assignee: Advantest Corp.
    Inventors: Hiroshi Yasuda, Takeshi Haraguchi, Hiroshi Shimoyama, Hidekazu Murata
  • Patent number: 8288956
    Abstract: A circuit for preheating filaments in lamps powered by an electronic ballast includes an inverter tank circuit and a preheat tank circuit. The preheat tank circuit has a preheat capacitor connected in parallel with a primary winding of a filament preheat transformer. A cut-back capacitor is connected between the preheat tank circuit and circuit ground. The filament preheat transformer has secondary windings coupled to the first and second lamp terminals to provide a filament preheat voltage. The inverter operates at a preheat frequency during a lamp preheat mode and at a steady-state frequency during a lamp steady-state mode, the steady-state frequency being lower than the preheat frequency. The preheat tank circuit has a natural resonant frequency that is approximately the same as the preheat frequency so that when the ballast is operating in the steady state mode, the filament voltage is substantially lower than when the ballast is operating in the preheat mode.
    Type: Grant
    Filed: April 2, 2010
    Date of Patent: October 16, 2012
    Assignee: Universal Lighting Technologies, Inc.
    Inventors: Wei Xiong, Thomas Lunn, Christopher Radzinski
  • Patent number: 8242678
    Abstract: An automotive discharge lamp, having an inner tube including a light emitting unit having a first space therein and seal portions formed on the light emitting unit, a discharge medium containing a first gas enclosed in the first space, a metal foil sealed in the seal portions, electrodes with one end connected to the metal foil and other end extended into the first space, and an outer tube connected to the inner tube to form a second space between the outer tube and the inner tube, wherein the second space has a second gas enclosed therein and the oxygen concentration in the second space is 1.0 volume % or less.
    Type: Grant
    Filed: December 10, 2008
    Date of Patent: August 14, 2012
    Assignee: Harison Toshiba Lighting Corp.
    Inventors: Ryo Itou, Makoto Deguchi, Syuhei Abe, Hisashi Yoshida, Masahiro Doi
  • Publication number: 20110294071
    Abstract: An electron gun includes a cathode, a bias electrode, and an anode disposed along a common axis in order thereof. In the electron gun, an electron emitting surface of the cathode has such a shape that brightness of a crossover is more uniform than that in a case that both a first region including a point on the axis and a second region located outside the first region have a first radius of curvature.
    Type: Application
    Filed: May 23, 2011
    Publication date: December 1, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Nobuo Imaoka
  • Patent number: 7857992
    Abstract: A white light-emitting lamp (1) includes a semiconductor light-emitting device such as a LED chip (2) which has an emission wavelength of 360 nm or more and 440 nm or less, and a light-emitting part including a blue light-emitting phosphor, a green light-emitting phosphor and a red light-emitting phosphor, which emits white light when excited by light from the LED chip (2). At least one phosphor selected from Eu activated halophosphate phosphors and Eu activated aluminate phosphors is used as the blue light-emitting phosphor, Au and Al activated zinc sulfide phosphor is used as the green light-emitting phosphor, and at least one phosphor selected from Eu and Sm activated lanthanum sulfide phosphors and Cu and Mn activated zinc sulfide phosphors is used as the red light-emitting phosphor.
    Type: Grant
    Filed: February 24, 2006
    Date of Patent: December 28, 2010
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.
    Inventors: Tsutomu Ishii, Yasuhiro Shirakawa, Yasumasa Ooya
  • Publication number: 20100231117
    Abstract: A display screen of a color display is disclosed (see FIG. 1). The display screen includes a glass plate having an array of three different color-emitting phosphors thereon. A graphite-based matrix is placed in the interstitial regions between each of the three different color-emitting phosphors. The graphite-based matrix is formed from an aqueous composition including graphite, potassium silicate and sodium silicate.
    Type: Application
    Filed: June 21, 2006
    Publication date: September 16, 2010
    Inventors: Barry Michael Cushman, David Paul Ciampa, James Francis Edwards
  • Patent number: 7777196
    Abstract: An electron emitter for a display provides an electron source, an electron accelerator, an electron collector disposed between the electron source and the electron accelerator, and one or more electron deflectors to selectively deflect electrons in an electron beam or electron plane towards the electron collector phosphorous coating on a display screen, within a non-metallic vacuum chamber having an adjustable vacuum. Pinhead electrode electron deflectors may each control one color of a pixel, and each set of three adjacent pinhead electrodes may comprise a complete pixel on the display screen.
    Type: Grant
    Filed: June 12, 2008
    Date of Patent: August 17, 2010
    Inventor: Wesam Khalil
  • Patent number: 7683529
    Abstract: Disclosed herein is a panel of a slim cathode ray tube constructed such that the deflection angle of an electron beam is 110 degrees or more. The slim cathode ray tube includes a tube part constituted by joining the panel and a funnel with each other. The panel includes a face part, a side wall disposed around the face part such that the side wall is bent toward the funnel, and a seal edge formed at the side wall, the panel being joined with the funnel at the seal edge. On the assumption that the thickness of the center of the face part is Tc, the thickness of the long side of the seal edge is Tx, the thickness of the short side of the seal edge is Ty, and the thickness of the diagonal part of the seal edge is Td, the panel is constructed such that the following inequalities are satisfied: 0.8?Tc/Ty?Tc/Tx?1.0?Tc/Td and Td<Tx<Ty, and the side wall has an outer skirt angle of 0.5 to 1.5 degrees.
    Type: Grant
    Filed: February 3, 2006
    Date of Patent: March 23, 2010
    Assignee: Meridian Solar & Display Co., Ltd.
    Inventors: Byong Gyu Hong, Sam Ki Choi, Young Woong Kim
  • Publication number: 20090121608
    Abstract: Disclosed are violet, blue, and green phosphors having excellent durability and high luminance. Specifically disclosed is a phosphor which contains a metal element M (M is at least one element selected from among Mn, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Tm and Yb) for constituting a metal ion, which is solid-solubilized in an AlON crystal, an AlON solid solution crystal or an inorganic crystal having the same crystal structure as AlON. The phosphor is capable of emitting fluorescence having a peak in the wavelength range from 300 nm to 700 nm. Also disclosed is a method for producing such a phosphor. Further disclosed are an illuminating device and an image display each containing such a phosphor.
    Type: Application
    Filed: February 22, 2007
    Publication date: May 14, 2009
    Inventors: Rong-Jun Xie, Naoto Hirosaki
  • Patent number: 7525243
    Abstract: A Cathode Ray Tube (CRT) includes a panel having an inner phosphor screen, a funnel connected to the panel and adapted to have a deflection unit arranged thereon and a neck connected to the funnel and having an electron gun arranged therein. A shatter-proof member is installed on the funnel to prevent the tube from shattering.
    Type: Grant
    Filed: February 16, 2006
    Date of Patent: April 28, 2009
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Joon-Soo Bae, Hoo-Deuk Kim, Kyou-Bong Lee, Seok-Nam Lee, Yun-Ho Chang, Chang-Ryon Byon, Do-Hun Pyun, Mun-Seong Kim
  • Patent number: 7439664
    Abstract: Cathode structure for cathode ray tube comprising an eyelet in two separate parts positioned such that one of the parts covers, in the longitudinal direction and at least partially, the second part. The two parts are linked to each other at the shouldered ends. This structure reduces the heat losses of the cathode and reduces its consumption while it is operating.
    Type: Grant
    Filed: June 20, 2005
    Date of Patent: October 21, 2008
    Assignee: Thomson Licensing
    Inventors: Christian Galmiche, Michel Tirant, François Fichet, Philippe Zehnder, Gérard Proudhon
  • Patent number: 7411342
    Abstract: Electromagnetic deflection unit for colour cathode-ray tubes, including a pair of frame deflection coils and a pair of line deflection coils, at least one of these two pairs of coils having the shape of a saddle, each saddle-shaped deflection coil having a rear bundle placed on the side facing the electron gun and a front bundle placed on the side facing the screen, two lateral harnesses of conductors connecting the front bundle to the rear bundle, each lateral harness being characterized in that the external edge of the said lateral harness lies in a radial angular position close to 0° at the rear of the coil and in a radial angular position greater than 5° at the front of the coil, so as to minimize the trapezoid differential error between the red and blue beams.
    Type: Grant
    Filed: March 23, 2000
    Date of Patent: August 12, 2008
    Assignee: Thomson Licensing
    Inventors: Nacerdine Azzi, Olivier Masson, Sebastien Volatier
  • Publication number: 20080138529
    Abstract: A method and apparatus for depositing a coating material on a surface of a substrate by an ion plasma deposition process using a hollow cathode is disclosed. The cathode may be a substantially cylindrical hollow cathode. A plasma arc is formed on the outer circumference of the cathode to remove coating material from the cathode, which is then deposited on a surface of a substrate. An internal arc drive magnet is contained within the hollow bore of the cathode and cooling is provided to the magnet during operation.
    Type: Application
    Filed: December 11, 2006
    Publication date: June 12, 2008
    Applicant: GE GLOBAL RESEARCH CENTER
    Inventors: Scott Andrew Weaver, William Thomas Carter, Paul Mario Marruso
  • Publication number: 20080042542
    Abstract: An electron emission device includes a substrate, cathode electrodes and gate electrodes formed on the substrate crossing one another to thereby form a plurality of crossed regions, and electron emission regions, each electrically coupled to one of the cathode electrodes. Each of the cathode electrodes includes a resistive layer formed with first openings, and a conductive layer disposed on one surface of the resistive layer, and formed with second openings. The second openings are spatially communicated respectively with the first openings, and circumferential wall portions of the conductive layer defining the second openings maintain a predetermined spacing from circumferential wall portions of the resistive layer defining the first openings. The electron emission regions are then disposed in the first openings.
    Type: Application
    Filed: March 30, 2007
    Publication date: February 21, 2008
    Inventors: Sam-Il Han, Sang-Hyuck Ahn, Sang-Jo Lee, Sang-Ho Jeon, Jin-Hui Cho, Su-Bong Hong
  • Publication number: 20070228922
    Abstract: For three types of the electron gun the brightness larger than Langmuir limit or the very high Emittance is obtained through a simulation. The first electron gun consists of a concave cathode and a convex anode, and for the gun with the cathode radius of Rc (mm) the emission current Ie (A) which give the brightness larger than Langmuir limit is in the range as, 0.733Rc?0.5?Ie?0.159Rc3+0.35. Rc?2.5 mm, or 0.733Rc?0.5?Ie?0.255Rc3?1.17. Rc>2.5 mm. The second electron gun consist of a flat cathode and a convex anode, and for the gun with a distance between the cathode and the anode of Dac (mm) the emission current Ie (mA) which give the brightness larger than Langmuir limit or the very high Emittance is in the range as, 0.388/Dac?0.046?Ie?92.8/Dac+9.28, Dac?3 mm, or 0.388/Dac?0.046?Ie?22/Dac+32.7, Dac<3 mm.
    Type: Application
    Filed: February 8, 2007
    Publication date: October 4, 2007
    Inventor: Mamora Nakasuji
  • Patent number: 7015635
    Abstract: Disclosed is a color CRT capable of obtaining the safety for an explosion by setting a band force of a reinforcing band coupled to a flat panel to be optimum, wherein a ratio of an effective surface of the panel is 4:3 and a following condition 0.0426*U2?46.848*U+14095?T*W*Yp?0.0381*U2?35.517*U+9994.1 is satisfied.
    Type: Grant
    Filed: January 26, 2004
    Date of Patent: March 21, 2006
    Assignee: LG.Philips Displays Korea Co., Ltd.
    Inventor: Sung-Han Jung
  • Patent number: 6903502
    Abstract: The invention relates to an inner shield for color cathode ray tube. The inner shield has two long side parts and two short side parts. Each of two long sides has an opening part which comprises an inclined part and an U-shape recessed edge. Otherwise, the opening part may comprise an vertical part and an U-shape recessed edge. Each of two short sides has a V-shaped opening. The inner shield of the invention is capable of surely shielding unintended external magnetic field.
    Type: Grant
    Filed: July 24, 2001
    Date of Patent: June 7, 2005
    Assignee: Orion Electric Co., Ltd.
    Inventor: Hyung-Jin Kim
  • Patent number: 6812654
    Abstract: The object of the present invention is to provide a field emission device that emits an electron beam bundle whose spot profile on a display screen has as little distortion as possible, and that maintains a stable electron emission property regardless of the length of a driving time, a CRT apparatus equipped with such field emission device, and a production method of such CRT apparatus. The field emission device (10) has, on a surface of a substrate (11), a plurality of cathode electrodes (12) parallel to each other, an insulation layer (13), and a plurality of extraction electrodes (14) parallel to each other, in the stated order, the cathode electrodes (12) and the extraction electrodes (14) being orthogonal to each other and so yielding a plurality of crossover regions. At the crossover regions, electron emission zones (15) each made up of four emitters (16) are formed.
    Type: Grant
    Filed: September 2, 2003
    Date of Patent: November 2, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Keisuke Koga, Toru Kawase
  • Patent number: 6800993
    Abstract: Flat CRT panel including a substantially flat outside surface, and an inside surface of a fixed curvature, wherein the inside surface of the panel is formed to meet a condition of {(Rh+Rv)/2}×Rd being in the range of 8.0-10.3, where “Rd” denotes a representative diagonal sectional radius of curvature, “Rh” denotes a representative long-axis sectional radius of curvature, and “Rv” represents a representative short-axis sectional radius of curvature when an effective screen size of the panel is greater than 25″, thereby reducing thermal breakage, and permitting fabrication of lighter panel.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: October 5, 2004
    Assignee: LG. Philips Displays Korea Co., Ltd.
    Inventors: Gi Hoon Tho, Sung Han Jung
  • Patent number: 6765343
    Abstract: A funnel in a CRT includes a body part welded to a panel, a cone part connected to the body part having a deflection yoke fitted thereto, and a neck part connected to the cone part having an electron gun sealed therein. The cone part is formed such that &Dgr;Y/&Dgr;X={YD-(DD*sin&thgr;2)}/{XD-(DD*cos&thgr;2)} is greater than 4, where DD denotes a diagonal length, XD denotes a long axis length, YD denotes a short axis length, and &thgr;2 denotes a diagonal angle between the long axis and the short axis.
    Type: Grant
    Filed: June 7, 2002
    Date of Patent: July 20, 2004
    Assignee: LG. Philips Displays Korea Co., Ltd.
    Inventor: Byoung Chul Kim
  • Patent number: 6720725
    Abstract: A picture display device comprising a cathode ray tube (1) with an elongated display screen (8) and a deflection system (9) is described. The deflection power is reduced by two means. The deflection system (9) is arranged to scan the lines in the direction of the short axis (22) of the display screen (8), and the cone portion (3) of the cathode ray tube (1) has an elongated cross-section (54) whose aspect ratio is larger than or equal to the aspect ratio of the display screen (8), thereby enabling the deflection system (9), and in particular the line deflection subsystem (12), to be positioned closer to the electron beam envelope (51), which reduces magnetic losses.
    Type: Grant
    Filed: November 27, 2001
    Date of Patent: April 13, 2004
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Marteijn De Jong, Marcellinus Petrus Carolus Michael Krijn, Pim Theo Tuyls, Boris Skoric, Michel Cornelis Josephus Marie Vissenberg
  • Publication number: 20040027043
    Abstract: The present invention aims at maintaining the high focusing performance at a low deflection power in a single-beam projection tube which is used as a projection type TV receiver or a projector and is operated at a high voltage and with a high current. The neck outer diameter of a portion on which a deflection yoke is mounted is made smaller than the neck outer diameter of a portion which accommodates an electron gun.
    Type: Application
    Filed: August 7, 2003
    Publication date: February 12, 2004
    Inventors: Kouichi Saitou, Kazumasa Hirai, Tetsuo Asano, Kotaro Aoki, Yasuo Tanaka
  • Patent number: 6690339
    Abstract: A method and a circuit arrangement for controlling the operating point of a cathode ray tube (3) for use in image technology applications. A video signal (1) is supplied to both the tube (3) and to a cathode ray tube model (2), which the model (2) uses to emulate a beam current. From the emulated beam current and a measured beam current, a characteristic quantity for adjusting the operating point is determined.
    Type: Grant
    Filed: June 7, 2001
    Date of Patent: February 10, 2004
    Assignee: Siemens Aktiengesellschaft
    Inventors: Klaus Burkhardt, Uwe Nagel, Erich Schaefer, Hartmut Schulz
  • Publication number: 20030214213
    Abstract: A bulb for a color cathode ray tube comprising a face plate and a color selection member having a plurality of opening portions, said bulb satisfying the following expressions (1) and (2), wherein X is a nominal diagonal inchage of the bulb, P (unit: mm) is a pitch of the opening portions along an electron beam sweep direction in the central portion of the bulb, GH (unit: mm) is a distance between an inner surface of the face plate and the color selection member in the central portion of the bulb, and LT is a value obtained by dividing a size (unit: mm) of the opening portion along the electron beam sweep direction in the central portion of the bulb by the pitch P (unit: mm).
    Type: Application
    Filed: June 12, 2003
    Publication date: November 20, 2003
    Inventors: Seiichi Tsunoda, Masanao Uesugi
  • Patent number: 6614151
    Abstract: A method and apparatus is disclosed for electrostatic deflection and focusing of a charged particle stream. The apparatus can include plural vertical and horizontal deflection plates, although a single vertical and a single horizontal deflection plate each with a reference potential plane are preferred. Both orthogonal and preferably tilted display screens are employed to receive the deflected beam. The particle stream is injected offset from a centered position and the stream is deflected asymmetrically relative to the attracting deflection plate. Two alternately preferred computer programs are employable to calculate an offset position. A preferred external quadrupole is employed to correct any residual astigmatism in the particle stream. In one embodiment, the apparatus is disposed in a cathode ray tube. A reduced footprint CRT is also disclosed. Methods and apparatuses for an energy filtered electron beam, a mass spectrometer and a mass separator are also disclosed.
    Type: Grant
    Filed: March 15, 2001
    Date of Patent: September 2, 2003
    Inventor: Michael W. Retsky
  • Patent number: 6597099
    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: Grant
    Filed: January 9, 2001
    Date of Patent: July 22, 2003
    Assignee: Nippon Electric Glass Co., Ltd.
    Inventor: Masaya Kyono
  • Patent number: 6593685
    Abstract: Color cathode ray tube including a panel in front portion of the cathode ray tube, and a shadow mask spaced from, and fitted to rear of the panel for selecting a color from electron beams, wherein at least one of an inside surface of the panel and the shadow mask have a curvature structure in which a radius of curvature varies continuously within a fixed ratio range, thereby enhancing a strength and improving howling.
    Type: Grant
    Filed: January 5, 2001
    Date of Patent: July 15, 2003
    Assignee: LG Electronics Inc.
    Inventor: Yong Kun Kim
  • Publication number: 20030111948
    Abstract: A method and apparatus is disclosed for electrostatic deflection and focusing of a charged particle stream. The apparatus can include plural vertical and horizontal deflection plates, although a single vertical and a single horizontal deflection plate each with a reference potential plane are preferred. Both orthogonal and preferably tilted display screens are employed to receive the deflected beam. The particle stream is injected offset from a centered position and the stream is deflected asymmetrically relative to the attracting deflection plate. Two alternately preferred computer programs are employable to calculate an offset position. A preferred external quadrupole is employed to correct any residual astigmatism in the particle stream. In one embodiment, the apparatus is disposed in a cathode ray tube. A reduced footprint CRT is also disclosed. Methods and apparatuses for an energy filtered electron beam, a mass spectrometer and a mass separator are also disclosed.
    Type: Application
    Filed: March 15, 2001
    Publication date: June 19, 2003
    Inventor: Michael W. Retsky
  • Patent number: 6501212
    Abstract: A method of insulating a cathode ray tube and an electrical insulator composition for a cathode ray tube enabling an electrical insulator to be produced without material loss and enabling improvement of the bonding strength between a stem and a stem base and the insulation property between stem pins, when attaching to a stem, which is provided at the cathode ray tube and has a tip and stem pins projecting therefrom, an insulating stem base, which comprises a base through which pin through holes are formed and has provided projecting from the front surface thereof a tip holder, in a state with the stem pins inserted through the pin through holes and the tip held in the tip holder, said method comprising the steps of molding an electrical insulator composition comprising an uncured self-adhesive silicone rubber into a predetermined sheet shape by using a transfer mold to obtain an electrical insulator, arranging the electrical insulator in a state extending from the positions of the pin through holes on the bac
    Type: Grant
    Filed: July 12, 2000
    Date of Patent: December 31, 2002
    Assignee: Sony Corporation
    Inventors: Takashi Setsuda, Hirokazu Kanno, Kazuhiko Tomaru, Tsutomu Yoneyama, Hisaharu Yamaguchi
  • Patent number: 6489734
    Abstract: A cathode ray tube device includes: a cathode ray tube with an envelope including a panel having a phosphor screen on its inner face and a funnel having a neck portion including an electron gun; and a deflection unit disposed around an outer face of the funnel. An inductance-adjusting element is provided therein for reducing an inductance at a frequency in an audio frequency band of at least one of a plurality of coils included in the deflection unit, and thereby noise is reduced that is generated by the at least one of the plurality of coils whose inductance is thus reduced.
    Type: Grant
    Filed: April 25, 2001
    Date of Patent: December 3, 2002
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shunsuke Matsuura, Asato Aoki, Kazuhiro Sugimoto
  • Publication number: 20020125807
    Abstract: An electronic ballast for discharge lamps with electrode filaments. The ballast contains a frequency-selective device, which suppresses an auxiliary heating current in the electrode filaments during operation of the lamp. Heating of the electrode filaments is possible only within a narrow frequency band.
    Type: Application
    Filed: January 7, 2002
    Publication date: September 12, 2002
    Applicant: PATENT-TREUHAND-GESELLSCHAFT FUER ELEKTRISCHE GLUE
    Inventors: Bernhard Schemmel, Michael Weirich
  • Publication number: 20020047508
    Abstract: A main lens comprises a second segment G5-2, a sixth grid G6 and an additional electrode GM disposed between the second segment G5-2 and sixth grid G6. A first-level constant voltage and a second-level constant voltage are applied to the second segment and sixth grid, respectively. A third-level voltage, which is at a level between the first level and the second level, is applied to the additional electrode. In accordance with the increase in deflection amount of an electric beam, the third-level voltage varies a value expressed by ((voltage to the additional electrode)—(voltage to the second segment))/((voltage to the sixth grid)—(voltage to the second segment)). An auxiliary lens comprising lenses including a third grid G3 and a first segment G5-1 has a focusing power decreasing in accordance with an increase in deflection amount of the electron beam.
    Type: Application
    Filed: June 28, 2001
    Publication date: April 25, 2002
    Inventors: Kazunori Satou, Tomonari Ishihara
  • Publication number: 20020008454
    Abstract: Disclosed is an electron source forming substrate provided with an insulating material layer provided on the surface of a substrate, at which surface an electron-emitting device is disposed, wherein the insulating material layer has a plurality of partially exposed metal oxide particles on its surface. Also disclosed are an electron source including a substrate and an electron-emitting device arranged on the substrate, wherein the substrate is an electron source forming substrate as described above, and an image display apparatus including an envelope, an electron-emitting device arranged in the envelope, and an image display member adapted to display images through application of electrons from the electron-emitting device, wherein a substrate on which the electron-emitting device is arranged is an electron source forming substrate as described above.
    Type: Application
    Filed: May 2, 2001
    Publication date: January 24, 2002
    Inventors: Kazuya Ishiwata, Shuji Yamada, Tadayasu Meguro
  • Publication number: 20010052744
    Abstract: A monochrometer mounted with the electron gun of an electron microscope or the like. This monochrometer does not need movement of a slit. An electron source consisting of any one of a thermal emission-type electron source (such as an LaB6 electron source or a tungsten hairpin), a Schottky emission-type electron source, and a tunneling field emission-type electron source is used. The slit is made of a single metal plate and mounted in position fixedly. Electrons are emitted from the electron source and dispersed within a plane including the slit according to energies. The slit is so positioned that it passes only those of the dispersed electrons which have energies close to the peak energy and blocks electrons having energies higher or lower than the peak energy.
    Type: Application
    Filed: April 10, 2001
    Publication date: December 20, 2001
    Applicant: JEOL Ltd.
    Inventor: Katsushige Tsuno
  • Patent number: 6259206
    Abstract: A cathode ray tube having an evacuated envelope including a panel section having a front face portion including a sloped sidewall, the sloped sidewall and an outer periphery portion being joined at mold match line, a neck containing therein an electron gun assembly, and a funnel section integrally coupling the panel section and the neck together. The sloped sidewall of the front faceplate has an angle which is in a range of 1.5 to 3 degrees to the tube axis, and a reinforcing band attached by a thermal shrink fit technique to and clamped around the outer periphery of the panel section. The reinforcing band is positioned around the panel section at a predefined position in which a circumferential bending line on the reinforcing band is offset from the mold match line of the cathode ray tube toward the neck.
    Type: Grant
    Filed: October 5, 2000
    Date of Patent: July 10, 2001
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Yasumasa Tsuchiya, Shinji Murooka
  • Publication number: 20010005237
    Abstract: 1. A display device is manufactured having a display with an auxiliary plate. The display window (3) and the auxiliary plate (15) are oriented at an angle of tilt &agr;1, preferably substantially vertically, the volume in between the display window and auxiliary plate is filed up to a selected level height (h) with uncured resin, a seal (17) and an opening (18) being provided at or near the highest point. Thereafter the display window is reoriented to a more horizontal position (smaller angle of tilt &agr;2) the auxiliary plate being positioned on top of the display window inducing a flow v of curable material (16) towards the opening (18), and when the resin has reached the opening the resin near the opening is plugged, where after the angle of tilt is further reduced and the resin is fully cured. FIG.
    Type: Application
    Filed: December 4, 2000
    Publication date: June 28, 2001
    Inventor: Gosse Charles De Vries
  • Patent number: 6232709
    Abstract: A method and apparatus is disclosed for electrostatic deflection and focusing of a charged particle stream. The apparatus can include plural vertical and horizontal deflection plates, although a single vertical and a single horizontal deflection plate each with a reference potential plane are preferred. Both orthogonal and preferably tilted display screens are employed to receive the deflected beam. The particle stream is injected offset from a centered position and the stream is deflected asymmetrically relative to the attracting deflection plate. Two alternately preferred computer programs are employable to calculate an offset position. A preferred external quadrupole is employed to correct any residual astigmatism in the particle stream. In one embodiment, the apparatus is disposed in a cathode ray tube. A reduced footprint CRT is also disclosed. Methods and apparatuses for an energy filtered electron beam, a mass spectrometer and a mass separator are also disclosed.
    Type: Grant
    Filed: October 23, 1998
    Date of Patent: May 15, 2001
    Inventor: Michael W. Retsky
  • Patent number: 6183871
    Abstract: A sealing glass paste which comprises at least one sealing glass frit powder and an aqueous binder which comprises an aqueous solution, dispersion or emulsion of a polymeric material and a water soluble oxidant which decomposes at a temperature of below 475° C., the polymeric material burning out or decomposing at a temperature of below 475° C., in the presence of the oxidant, to leave less than 2% of residues based on the total weight of the solids content of the binder. The sealing glass pastes may be used in the assembly of cathode ray tubes. The aqueous binder system which is used results in low carbonaceous residue levels after firing and does not contain volatile organic solvents. Furthermore, using this aqueous binder system sealing glass pastes can be prepared with sealing glasses which include PbO therein.
    Type: Grant
    Filed: June 29, 1998
    Date of Patent: February 6, 2001
    Assignee: Fry's Metals, Inc.
    Inventors: Warren Lee, Jason Robert Brewer
  • Patent number: 6157125
    Abstract: A second film that contains a substance that secures the conductivity of conductive particles is formed on a first film that contains the conductive particles. The first film and the second film are sintered at the same time. Thus, a conductive anti-reflection film having a sufficiently low surface resistance with a sufficient transmissivity for a high transparency can be obtained with high cost performance. When the conductive anti-reflection film is used for a cathode ray tube, it can almost prevent the AEF (Alternating Electric Field), display a picture in high quality, and be excellent in cost performance.
    Type: Grant
    Filed: July 22, 1999
    Date of Patent: December 5, 2000
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hisashi Chigusa, Michiyo Abe, Katsuyuki Aoki
  • Patent number: 6150760
    Abstract: An implosion protection-enhanced cathode ray tube (CRT) includes an evacuated envelope structured from a display panel section, a neck, and a funnel section. The CRT comes with a reinforcing metal band for implosion protection clamped by thermal shrink-fit methods around the outer periphery of the panel. This implosion-protective band may be a metal strip of generally rectangular closed-loop shape. The strip is machined to have bent walls so that it resembles in shape an open-roof dome as a whole. Preferably, the band has its one edge as folded back or "curled" defining a "flip." Upon attachment to the display panel, the band is placed so that the "peak" of each bulged wall is offset in position from a mold match line of the panel toward the CRT neck. With such "band preoffset" feature, the implosion-protective band offers increased locking or clamping forces against the panel thus enhancing the CRT implosion protecting ability.
    Type: Grant
    Filed: April 15, 1999
    Date of Patent: November 21, 2000
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Yasumasa Tsuchiya, Shinji Murooka
  • Patent number: 6104194
    Abstract: In a method for determining whether electronic charge has been accumulated on the inner surface of a cathode ray tube (10), at least one electron beam is generated within the cathode ray tube and is deflected so that it hits the inner surface of the funnel (14) of the cathode ray tube. The temperature of a portion of the cathode ray tube is measured and is compared with a reference temperature value. If the measured temperature is greater than or equal to the reference temperature, it is determined that the electronic charge has accumulated. If the measured temperature is below the reference temperature, then the electron beam or beams have become switched off and electronic charge may not have accumulated on the inner surface of the cathode ray tube.
    Type: Grant
    Filed: February 6, 1998
    Date of Patent: August 15, 2000
    Assignees: Sony Corporation, Sony United Kingdom Limited
    Inventor: Hideo Kato
  • Patent number: 5859494
    Abstract: The present invention relates to a process for manufacture of color cathode-ray tube for preventing the deterioration of color purity of red phosphor while enhancing the brightness and the contrast of color cathode-ray tube, which comprises steps of forming a black matrix film corresponding to 3 colors of green(G), blue(B) and red(R) onto the panel glass by using 0.067-0.075 g atom (content relative to 1 mol of Y.sub.2 O.sub.3) of europium(Eu) as an activator for red phosphor; forming a 3 color fluorescent film onto said black matrix film, wherein said 3 color fluorescent film consists of green phosphor, red phosphor to which predetermined amount of red pigment having 50-70% of reflectance has been adhered, and blue phosphor to which predetermined amount of blue pigment having 50-65% of reflectance has been adhered; coating an organic film on the 3 color fluorescent film; forming a metal reflective film thereon; and thermally decomposing the organic film at high temperature to obtain a fluorescent plane.
    Type: Grant
    Filed: July 17, 1996
    Date of Patent: January 12, 1999
    Assignee: LG Electronics Inc.
    Inventor: Hae-Beob Jeong
  • Patent number: 5825435
    Abstract: By selecting the number of apertures per vertical row in the shadow mask of a color cathode ray tube to be in the range between 615 and 650, such a cathode ray tube can be used both in a PAL, an NTSC system and a MUSE system without the occurrence of disturbing Moire effects. In a second embodiment the number of apertures per row ranges between 425 and 450.
    Type: Grant
    Filed: August 31, 1995
    Date of Patent: October 20, 1998
    Assignee: U.S. Philips Corporation
    Inventors: Leendert Vriens, Rene A. Stoffels
  • Patent number: 5793448
    Abstract: A cathode ray tube package includes a cathode ray tube assembly and a housing assembly including a deflection coil and/or at least one focus coil. The cathode ray tube assembly includes a collar (31) aligned with the electron beam, being arranged to mate with a mounting collar (41) carried on the housing assembly. The provision of the collar (31) enables the cathode ray tube assembly to be easily replaced at the end of the cathode ray tube's life within the housing assembly without the need for realignment of the coils.
    Type: Grant
    Filed: September 26, 1995
    Date of Patent: August 11, 1998
    Assignee: Brimar Limited
    Inventors: George David Atkinson, James Francis Nangle
  • Patent number: 5726533
    Abstract: The invention relates to a cathode ray tube having an input resonator cavity which includes a first metal wall (2) and, spaced apart therefrom, a second metal wall (3) each conveying a low electric potential and constituting coupling areas (6, 7) at axially spaced locations, in which areas metal elements (10, 12) conveying a high electric potential are located opposite surface sections (8, 9 and 14, 15) which are electrically connected to the metal walls (2, 3) via insulating dielectrics (11, 13), the coupling areas (6, 7) being separated by a spacing dielectric. A high-voltage stable arrangement which is resistant to temperature fluctuations is obtained in that the spacing dielectric consists of a different material than the insulating dielectrics (6, 7) and has a lower value of the product of loss factor and dielectric constant (tg.delta..times..epsilon.) at a high frequency.
    Type: Grant
    Filed: December 13, 1996
    Date of Patent: March 10, 1998
    Assignee: U.S. Philips Corporation
    Inventors: Stefan Grote, Horst Seifert
  • Patent number: 5643674
    Abstract: The present invention relates to a novel cost efficient luminescent composition comprising particles of a core material which have been coated with a luminescent material that is distributed in the form of a chemically homogeneous layer. The average diameter of the core particle is in the range of from about 0.5 to 20 microns, and the coating corresponds to between about 2 and 30 wt % of the total composition. One aspect the invention relates to a process for preparing the composition which comprises decomposing chelated metal luminescent precursors in solution at a relatively high pH while in the presence of dispersed core particles, thereby coating the core particles with hydrous metal oxides, recovering the coated particles, washing the coated particles substantially free from soluble species, drying and calcining. In another aspect, a hydrous oxide coating is converted to a sulfide coating by treating the hydrous coating with a source of active sulfur.
    Type: Grant
    Filed: June 1, 1993
    Date of Patent: July 1, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Salvatore Anthony Bruno, Donald Keith Swanson
  • Patent number: 5606377
    Abstract: The invention relates to an implosion protection band 26, 126 for a CRT having a plurality of brackets 40, 70, 140 that are disposed between the band and a sidewall 3 of the CRT 1 and detachably attached to the implosion protection band to support either a degaussing coil 9 or to facilitate mounting the CRT within a receiver.
    Type: Grant
    Filed: October 10, 1995
    Date of Patent: February 25, 1997
    Assignee: Thomson Consumer Electronics, Inc.
    Inventor: Harry R. Swank