With Coating Or Spiral Electrode Patents (Class 313/450)
  • Patent number: 9513266
    Abstract: A GC-IMS system is disclosed. The system includes a sample transfer device. The sample transfer device connects the gas chromatograph to the reaction region and, the sample from the gas chromatograph is transferred to the reaction region by the sample transfer device. With the GC-IMS system, generation of sample molecular ion fragments can be avoided so that the spectrum is easily identified; moreover, the application field of the GC-IMS system is extended to a range of analysis of organic macromolecule samples which have a high polarity, are difficult to volatilize, and are thermally instable. On the other hand, the GC-IMS system overcomes the defect of ion destruction due to neutralization reaction among positive and negative ions so as to evade the detection.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: December 6, 2016
    Assignee: NUCTECH COMPANY LIMITED
    Inventors: Qingjun Zhang, Yuanjing Li, Zhiqiang Chen, Qiufeng Ma, Ziran Zhao, Yinong Liu, Yaohong Liu, Xiang Zou, Yanchun Wang, Junxiao Wang, Jianping Chang
  • Patent number: 8623696
    Abstract: A method of forming an emission layer by using droplets and an emission part on which charges with opposite polarities are induced, a method of manufacturing an organic light emitting display device including the emission layer, and the organic light emitting display device thereof, the method includes inducing charges having a first charge polarity on emission portions by facing a surface of a mask and a surface of a substrate, contacting the charge inducing units of the mask to the emission portions of the substrate, and then separating the mask from the substrate, supplying droplets exhibiting a second and opposite charge polarity to the substrate and forming the emission layer by allowing droplets exhibiting the second charge polarity to be attracted to and move to the emission portions exhibiting the first charge polarity.
    Type: Grant
    Filed: September 19, 2011
    Date of Patent: January 7, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sung-Hwan Cho, Hyo-Seok Kim
  • 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: 6917151
    Abstract: A resistor for an electron gun assembly is configured to apply a voltage, which is divided with a predetermined resistance division ratio, to an electrode provided in the electron gun assembly. The resistor includes an insulating substrate, an electrode element provided in association with each of a plurality of terminal portions on the insulating substrate, a resistor element having a pattern for connecting the electrode elements and obtaining a predetermined resistance value, and an insulating coating layer that covers the resistor element. In at least one terminal portion B, the electrode element is disposed spaced apart from the insulating coating layer, and an intermediate resistor element is disposed between the electrode element and the insulating coating layer. The intermediate resistor element has a resistance value that is different from a resistance value of the electrode element.
    Type: Grant
    Filed: September 3, 2004
    Date of Patent: July 12, 2005
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Junichi Kimiya, Shigeru Sugawara, Takahiro Hasegawa
  • Patent number: 6847159
    Abstract: The present invention aims at maintaining the high focusing performance with a low deflection power in a projection tube which is used as a projection type TV receiver or a projector and is operated at a high voltage and with a single-electron-beam high current. A neck outer diameter of a portion on which a deflection yoke is mounted is made smaller than a neck outer diameter of a portion which accommodates an electron gun. A final electrode of the electron gun has a diameter thereof gradually decreased toward a phosphor screen. The maximum anode voltage of the projection tube is set to equal to or more than 25 KV and the maximum beam current is set to equal to or more than 4 mA.
    Type: Grant
    Filed: August 24, 2001
    Date of Patent: January 25, 2005
    Assignees: Hitachi Ltd., Hitachi Electronic Devices, Co., Ltd.
    Inventors: Nobuyuki Suzuki, Kotaro Aoki, Kouichi Saitou, Shoji Shirai
  • Patent number: 6774554
    Abstract: A cathode ray tube includes a bulb including a front panel and a funnel, and an electron gun. The front panel includes a color selection mechanism and phosphors on an inner surface thereof. The funnel includes a conductive layer on an inner wall thereof. The electron gun is accommodated in a neck portion of the funnel. The conductive layer is divided into at least two regions, each of which has a different electric potential. A high electric potential conductive layer having a high electric potential, an insulating region, a resistive layer, and a low electric potential conductive layer having an electric potential lower than that of the high electric potential conductive layer are formed in this order from the panel side to the electron gun side. With this configuration, the two conductive layers do not interfere with each other because of discharge or the like and are independent, and stable voltage can be maintained. Thus, an electrostatic lens can be formed.
    Type: Grant
    Filed: August 24, 2000
    Date of Patent: August 10, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Toshikuni Kojima, Masanori Morii, Hiromi Wakasono
  • Patent number: 6703775
    Abstract: In an electron gun for a color cathode ray tube apparatus of this invention, one intermediate electrode is arranged between a final acceleration electrode and a focus electrode that make up a main lens, and a voltage divided by a voltage dividing resistor for dividing a voltage to be applied to the final acceleration electrode is applied to the intermediate electrode. A dynamic voltage which increases along with an increase in deflection amount of an electron beam is applied to the focus electrode, and a dielectric portion is formed between the final acceleration electrode and the focus electrode. This dielectric portion is formed on the intermediate electrode. Hence, elliptical distortion of electron beam spots is decreased on the entire surface of a phosphor screen, thereby providing a color cathode ray tube apparatus with a good performance on the entire surface of the phosphor screen.
    Type: Grant
    Filed: April 25, 2001
    Date of Patent: March 9, 2004
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Noriyuki Miyamoto, Hirofumi Ueno, Tsutomu Takekawa
  • Patent number: 6639348
    Abstract: A color cathode ray tube includes an evacuated envelope having a generally rectangular panel portion, a narrow neck portion having a circular cross-section and a funnel portion tapering down from a panel-portion side thereof toward a neck-portion side thereof for connecting the panel portion and the neck portion, a three-color phosphor screen formed on an inner surface of the panel portion, an electron gun housed in the neck portion, and an internal conductive film extending from an inner wall of the neck portion to an inner wall of the funnel portion. The funnel portion is provided with a yoke-mounting portion of generally truncated quadrilateral-pyramidal shape for mounting a beam deflection yoke therearound on the neck-portion side of the funnel portion. The internal conductive film is formed of a first part and a second part, the first part is formed of graphite, metallic oxide and potassium silicate, and the second part is formed of graphite and potassium silicate.
    Type: Grant
    Filed: March 20, 2000
    Date of Patent: October 28, 2003
    Assignees: Hitachi, Ltd, Hitachi Device Engineering Co., Ltd.
    Inventors: Hiroshi Ito, Shunichi Matsumoto, Kiyoshi Sento, Kazuyuki Nishimura, Nobuhiko Hosotani, Masatoshi Akiyama
  • Patent number: 6577054
    Abstract: An electron gun for cathode ray tubes (CRTs) with a helical multi-lens electrode assembly which is formed by coupling auxiliary electrodes to both ends of a helical resistive coil. The auxiliary electrodes have claws to be embedded in bead glasses, so that the helical resistive coil is mechanically supported in the electron gun. As a voltage is applied to the helical resistive coil through the auxiliary electrodes, multiple electron lenses are created due to voltage drops in each pitch of the helical resistive coil.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: June 10, 2003
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Sang-mook Kim, Sang-kyun Kim, Duk-sung Park, Bong-wook Jung, Yeong-guon Won
  • Patent number: 6570330
    Abstract: A resistor for an electron gun assembly, for applying a resistor-divided voltage to an electrode provided in the electron gun assembly, comprises an insulative substrate, at least two first resistor elements disposed at predetermined positions on the insulative substrate, and a second resistor element having a predetermined pattern which electrically connects the first resistor elements. The resistor has a structure in which an effective length of the second resistor element between the first resistor elements varies in accordance with a position of the second resistor element relative to the first resistor elements.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: May 27, 2003
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Nobuhiro Nagamachi, Yoshihisa Kaminaga
  • Patent number: 6559586
    Abstract: A cathode ray tube and a plural beam electron gun therefor include a main lens that comprises a tubular focus grid G5 and a conductive coating on the inner surface of the tube neck. The neck coating extends from the region of focus grid G5 towards the faceplate of the cathode ray tube. Preferably, the exit of the focus grid G5 is non-planar and is curved or undulated and focus grid G5 includes an aperture plate intermediate its entrance and exit. The aperture plate preferably has an elliptical center beam opening and connected-semi-elliptical outer-beam openings, to better converge and focus the outer and center electron beams. Also preferably, the focus grid G5 is centrally located in the tube neck and at least partly surrounded by the conductive neck coating.
    Type: Grant
    Filed: July 21, 2000
    Date of Patent: May 6, 2003
    Assignees: Sarnoff Corporation, Samsung Display Devices, Co., LTD
    Inventors: Roger Casanova Alig, Dennis John Bechis, David Arthur New
  • Patent number: 6515424
    Abstract: A color cathode ray tube has an electron gun in its neck portion. The electron gun includes plural focus electrodes and an anode fixed in axially spaced relationship by two support rods. The electron gun also includes a voltage-dividing resistor for producing a voltage applied to a first focus electrode by dividing a voltage applied to the anode, and a metal conductor surrounding the resistor and fixed to a second focus electrode upstream of the first focus electrode. The resistor is disposed in the vicinity of one of the support rods, is formed of an insulating film, a resistance pattern, and a substrate disposed in the order named from the insulating film toward the neck portion. The resistance pattern is such that a potential difference between the metal conductor and a portion of the resistance pattern facing the metal conductor is equal to or smaller than 4 kV.
    Type: Grant
    Filed: September 17, 2001
    Date of Patent: February 4, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Hisao Nakamura, Sachio Koizumi, Kenji Suzuki
  • Patent number: 6504296
    Abstract: In order to improve the definition and the breakdown behavior in a tube neck (16) that includes an anode cylinder (20) and a focusing cylinder (19), the tube neck (16) is made of a non-conductive material, particularly a ceramic. The inner surface of the anode cylinder (20) and the inner surface and the outer surface of the focusing cylinder (19) are coated with an electrically conductive material (21).
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: January 7, 2003
    Assignee: Siemens Aktiengesellschaft
    Inventors: Klaus Burkhardt, Wolfgang Eckhardt
  • Patent number: 6369512
    Abstract: A projection tube has a phosphor-coated faceplate at one end of a vacuum envelope and a plural-beam providing electron lens structure at the opposite end thereof. The electron lens structure includes four electrodes having axially-aligned apertures defining parallel channels for the plural electron beams to pass through to be focused and converged onto a small spot on the faceplate. The first and second electrodes of the electron lens structure shape the electron beams and the third and fourth electrodes thereof converge and focus the electron beams toward the same location on the faceplate. The potential applied to the fourth electrode is at or close to the potential at the phosphor, and is substantially higher than the potential applied to the third electrode. The lens structures of the third and fourth electrodes may each include an inner electron lens structure and an outer electron lens structure.
    Type: Grant
    Filed: October 4, 1999
    Date of Patent: April 9, 2002
    Assignee: Sarnoff Corporation
    Inventors: Roger Casanova Alig, Dennis John Bechis
  • Patent number: 6307315
    Abstract: A cathode ray tube includes a bulb having a screen, a conductive layer coated on the inner surface of the bulb, an electron gun mounted in the neck portion and having a final accelerating electrode electrically connected to the conductive layer, and leakage current shielding means installed in the neck portion, for shielding leakage current flowing along the inner surface of the neck portion from the conductive layer.
    Type: Grant
    Filed: September 22, 1998
    Date of Patent: October 23, 2001
    Assignee: Samsung Display Devices Co., Ltd.
    Inventors: Duk-sung Park, Sang-kyun Kim
  • Patent number: 6229256
    Abstract: A cathode ray tube according to the invention comprises an internal conductive film arranged on the inner wall surface of the envelope and extending from the funnel section to the neck section and a high resistance conductive film arranged in the neck section to contact the internal conductive film at an end of thereof and surround part of the electron gun assembly. The high resistance conductive film shows an electric resistance higher than that of the internal conductive film. Additionally, in a cathode ray tube according to the invention, the electric resistance of the high resistance conductive film in terms of per unit length along the axis of the tube is lower at and near the contact region held in contact with the corresponding end of the internal conductive film than at and near the opposite end of the high resistance conductive film.
    Type: Grant
    Filed: November 10, 1998
    Date of Patent: May 8, 2001
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Fumihito Suzuki, Shigeru Sugawara, Takahiro Hasegawa
  • Patent number: 6184615
    Abstract: A vertical deflection system for a CRT is disclosed which has a pair of traveling wave deflectors disposed opposite each other across a path of beam from gun to target. Each deflector has a helical conductor in the for of a strip of sheet metal coiled around an elongate core of insulating material. For the provision of a CRT capable of handling a wide band of frequencies, the dispersion characteristic of each traveling wave conductor is optimized through adjustment of the specific dielectric constant of the insulating core. Preferred values of the specific dielectric constant are specified in relation to the characteristic impedance of the traveling wave conductor.
    Type: Grant
    Filed: September 29, 1998
    Date of Patent: February 6, 2001
    Assignee: Iwatsu Electric Co., Ltd.
    Inventor: Tsutomu Tobari
  • Patent number: 6133685
    Abstract: In a cathode-ray tube, a nonmetallic material such as ceramic or the like is used for an electrode 1a part of an electron gun. Consequently, the deterioration of the efficiency of modulation of electron beam trajectories by an eddy current generated at the metallic electrode part of the electron gun in the high-frequency magnetic fields and the heat generation at the electrode can be decreased. The generation of the eddy current by high-frequency magnetic fields by a convergence yoke or the like can be restrained by using a nonmetallic material for the electrode part of the electron gun. Consequently, the efficiency of modulation of electron beam trajectories is not deteriorated also in a high-frequency modulation zone and the heat generation at the electrode part can be also restrained. Less deterioration of efficiency of modulation of electron beam trajectories by the alternating magnetic fields occurs even in the high-frequency modulation zone, for example, more than 100kHz.
    Type: Grant
    Filed: April 23, 1998
    Date of Patent: October 17, 2000
    Assignee: Matsushita Electronics Corporation
    Inventors: Masahiko Konda, Hideharu Omae, Nozomu Arimoto
  • Patent number: 6005338
    Abstract: In order to provide a method of producing a cathode ray tube in a manner which well matches with a usual technique of producing a cathode ray tube by forming a spiral high-resistor on an inner face of a glass tube, in an electron gun of which a main focusing lens is configured by the spiral high-resistor, the step of fritting seal rings to both ends of the glass tube in which a hole is opened in the center portion; the step of applying a high-resistor paste to the glass tube, drying the paste, and then forming a spiral structure in the high-resistor film; the step of firing at 420 to 550 deg. C.; and the step of combining other electron gun parts to form the electron gun are included, and the spiral high-resistor is formed by a high-resistor paste in which ruthenium oxide is added to a glass material having a softening point that is lower than the annealing point of the glass tube.
    Type: Grant
    Filed: February 6, 1998
    Date of Patent: December 21, 1999
    Assignees: Matsushita Electronics Corporation, Matsushita Electric Industrial Co., Ltd.
    Inventors: Hideharu Omae, Masahiko Konda, Kazuaki Hirabayashi, Mitsuhiro Otani, Shigeo Nakatera
  • Patent number: 5969471
    Abstract: A one-piece grid assembly for use in an electron gun for a miniature cathode-ray tube application that consists of a core made of an electrically insulating material, a first grid deposited on the core, and a second grid deposited on the core that is spaced apart from the first grid, and a method of making the one-piece grid assembly by first compression molding the core and then depositing the grid by plating are disclosed.
    Type: Grant
    Filed: February 21, 1996
    Date of Patent: October 19, 1999
    Assignee: Industrial Technology Research Institute
    Inventors: Lyuji Ozawa, Hsien Nan Ho, Jiin-Long Lin, Jen-Chau Wu
  • Patent number: 5828167
    Abstract: A color cathode ray tube includes a three beam inline electron gun; a deflection device for performing deflection and self-convergence; a static beam convergence device having permanent magnets for generating a magnetic field adjustable to converge three electron beams at a central portion of a phosphor screen; and a dynamic convergence device having coreless electromagnetic coils for generating a magnetic field adjustable to converge three electron beams at peripheral portions of the phosphor screen. The dynamic beam convergence device includes a spiral coil conductor formed on a non-magnetic film.
    Type: Grant
    Filed: July 19, 1996
    Date of Patent: October 27, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Hiroshi Jitsukata, Soichi Sakurai, Hiroshi Yoshioka, Yoshio Sato, Hiroshi Sasaki, Hidetsuyo Baba
  • Patent number: 5789852
    Abstract: An electron-beam-pumped laser includes a cathode ray tube containing a laser crystal, an electron gun for producing an electron beam including a multi-element focusing electrode layer on an inner surface of the tube for effecting focusing of the beam on the laser crystal, and a multi-element deflection electrode layer on an inner surface of the tube for effecting scanning of the beam across the laser crystal. The laser crystal is disposed on a metal heat-conductive support which is adapted for accurately positioning the laser crystal in closely spaced relationship with respect to the electron gun and to a laser light emitting window of the tube.
    Type: Grant
    Filed: January 4, 1996
    Date of Patent: August 4, 1998
    Assignee: U.S. Philips Corporation
    Inventors: Hugo J. Cornelissen, Gerard E. Van Rosmalen, Cornelis J. Savert, Gerardus A. H. M. Vrijssen
  • Patent number: 5773925
    Abstract: An electron gun comprising at least one cathode for emitting electrons, a cylindrical device, a first electrode layer provided on the cathode side of inner surface of the cylindrical device, a second electrode layer provided on a panel side of inner surface of the cylindrical device, and a third electrode layer provided between the first electrode layer and the second electrode layer, a ratio of a gap between the second electrode and the third electrode to a gap between the first electrode and the third electrode being defined more than 1, wherein the ratio of the gap between the second electrode and the third electrode to the gap between the first electrode and the third electrode is 1 to 2, the cylindrical device is made of ceramic, and further comprising at least one resistive layer provided on the inner surface of the cylindrical device, and at least one conductive layer provided between the adjacent electrode layers.
    Type: Grant
    Filed: October 23, 1995
    Date of Patent: June 30, 1998
    Assignee: Sony Corporation
    Inventors: Shingo Kimura, Shigenori Tagami
  • Patent number: 5749638
    Abstract: An electron-optical device comprising a cathode ray tube with an envelope comprising an electron gun for producing an electron beam, whose inner surface carries a multi-element layer electrode such as a helical structure formed from a high-ohmic resistance material, which structure constitutes a focusing lens. A deflection system is used for moving the focused electron beam across a laser crystal arranged in the tube. Due to the laser action of the crystal, a scanning laser is realized. The laser light leaves a window in the tube envelope. The window extends at an angle between 20.degree. and 60.degree. to the longitudinal axis of the tube which is parallel to the electron beam incident on the laser crystal. Used in, inter alia, projection tubes and electron beam-pumped lasers (for example, scanning lasers).
    Type: Grant
    Filed: April 30, 1996
    Date of Patent: May 12, 1998
    Assignee: U.S. Philips Corporation
    Inventors: Hugo J. Cornelissen, Cornelis J. Savert, Johannes T.H. Leijten
  • Patent number: 5670841
    Abstract: An electron gun having at least one tube, a pair of holders for holding both ends of the tube, a plurality of electrode layers which are provided on the inner surface of the tube so as to form a part of a main lens, at least one conductive layer provided on the surface of the tube, and a plurality of electrodes for forming a part of triode. Also, a method of manufacturing an electron gun comprises the steps of forming a plurality of electrode layers on the inner surface of at least one tube, providing at least one conductive layer on the surface of the tube, providing a pair of holders so as to hold both ends of said tube, providing a voltage supplying device on one of the pair of holders, and welding a plurality of electrodes forming a part of a triode to the other of the pair of holders.
    Type: Grant
    Filed: December 27, 1993
    Date of Patent: September 23, 1997
    Assignee: Sony Corporation
    Inventors: Tsuneo Muti, Tsunenari Saito
  • Patent number: 5661363
    Abstract: A main lens member for an electron gun comprises at least one high electrical resistance layer formed of a higher electrical resistance material sandwiched between low electrical layers which are laminated together to form a main line of an electron gun.
    Type: Grant
    Filed: July 12, 1995
    Date of Patent: August 26, 1997
    Assignee: Sony Corporation
    Inventors: Yukinobu Iguchi, Tsuneo Muchi, Tsunenari Saito, Tomohisa Asano
  • Patent number: 5592045
    Abstract: A yoke separator or liner includes a body having a conical shape and a ring shaped retraining member that is attachable to a rear portion of the body by four pairs of pawls and studs. A beam s velocity modulation coil is installed on a support member made of flexible material using a printed circuit technique. The studs are inserted in orifices formed in the support member. The pawls snap onto the studs and press against the support member in a manner to secure the modulation coil.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: January 7, 1997
    Assignee: Thomson Tubes & Displays, S.A.
    Inventors: Alain Dossot, Christophe Mathey, Alain Vougny
  • Patent number: 5521464
    Abstract: An electron-optical display device includes a cathode ray tube having a cylindrical neck of very small external diameter, such as .ltoreq.15 mm, the inner surface of the neck having thereon a helical multi-element layer electrode formed of a high ohmic resistance material, which electrode constitutes a focusing lens. In combination with a deflection system of correspondingly small diameter and operating at high scanning frequencies, this makes it possible to use a very small scanning spot of high luminance and without requiring excessive deflection energy. The device may be used as a television image projection tube or as an electron beam pumped scanning laser.
    Type: Grant
    Filed: December 16, 1994
    Date of Patent: May 28, 1996
    Assignee: U.S. Philips Corporation
    Inventors: Gerardus A. H. M. Vrijssen, Hugo J. Cornelissen, Gerard E. van Rosmalen, Cornelis J. Savert
  • Patent number: 5510670
    Abstract: A focussing lens for an electron beam device is formed by a helically coiled resistance layer of a fired suspension of a conductive material of a mixture of a lead rathenate, a lead titanate and a ruthenium oxide in a glass formed of silicon dioxide, aluminum oxide and lead oxide.
    Type: Grant
    Filed: July 19, 1994
    Date of Patent: April 23, 1996
    Assignee: Philips Electronics North American Corporation
    Inventors: William N. Osborne, Petrus J. M. Prinsen, Edwin A. Montie
  • Patent number: 5291095
    Abstract: A cathode ray tube comprising an electron gun having two oppositely arranged conductor patterns. In operation, the electron beams (or electron beam) move between the conductor patterns. It has been found that the electron-optical functions, such as focusing and converging the electron beams, which are fulfilled by electrodes in a conventional gun can be fulfilled by two flat-conductor patterns. Said conductor patterns can be accurately manufactured and arranged relative to each other. This enables the manufacture of complicated lens systems.
    Type: Grant
    Filed: February 20, 1992
    Date of Patent: March 1, 1994
    Assignee: U.S. Philips Corporation
    Inventor: Johannes H. Bohlander
  • Patent number: 5256934
    Abstract: Picture display device comprising a display tube with an electron gun having a hollow tubular structure with an inner surface on which a resistance structure of a material having a high electrical resistance is provided, which structure constitutes a focusing lens. The resistance structure is connected to at least two axially spaced electric contacts for connecting an anode voltage and at least one electric contact located in between for applying a focusing voltage. An electrode means of low-ohmic material for controlling the focusing lens by means of a dynamic correction signal is arranged in the region of the connection for the focusing voltage. Upon energization, the low-ohmic electrode means particularly exercises a non-rotationally symmetrical effect on the electron beam.
    Type: Grant
    Filed: May 13, 1992
    Date of Patent: October 26, 1993
    Assignee: U.S. Philips Corporation
    Inventors: Jeroen Van Engelshoven, Ger-Wim J. Goorhuis, Gerardus J. A. Hellings, Gerardus A. H. M. Vrijssen, Tjerk G. Spanjer
  • Patent number: 5254903
    Abstract: A cathode ray tube includes a plurality of electrode layers which are separately formed in the advancing direction of electron beam, and form a plurality of electrostatic lenses along with corresponding electrodes of an electron gun upon applying voltages of differing potentials. The cathode ray tube has an accelerating electrode layer as an accelerating electrode which forms a main lens with a focusing electrode of the electron gun, and an electrode layer as a prefocusing electrode which forms a prefocusing lens with the focusing electrode and other electrodes, so that the electron beam is accelerated and focused by the electrode layer formed on the inner surface of a neck. The image quality realized on the screen can be improved, while reducing the length of the neck.
    Type: Grant
    Filed: December 31, 1991
    Date of Patent: October 19, 1993
    Assignee: Samsung Electron Devices, Co., Ltd.
    Inventors: Cheol-sik Jo, Seong-wu Ham
  • Patent number: 5220242
    Abstract: A high resistance body for supplying the high voltage of an anode terminal to the electrodes of an electron gun is coil-shaped. The anode terminal is mounted on the funnel portion of a glass bulb, and overlapped by a first conducting layer. The anode terminal is electrically connected to the electrodes of the electron gun comprising the coil-shaped high resistance body, second conducting layer and metal strip. The equivalent circuit comprises a resistance and condenser connected in parallel, at least an inductance generated by the coil-shaped high resistance body connected in series to the resistance, and the electrodes of the electron gun.
    Type: Grant
    Filed: August 30, 1991
    Date of Patent: June 15, 1993
    Assignee: Goldstar Co., Ltd.
    Inventor: Woong B. Choi
  • Patent number: 5218443
    Abstract: A television camera tube with spurious image black-out screen is disclosed. Especially in image pick-up tubes where the electron beam, scanning a photosensitive target, is oriented by a system of electrostatic deflection, it has been observed that spurious images appear in the output video signal of the tube. These images are apparently due to a return beam that comes back from the target and strikes the accelerating electrode of the electron gun. To black out these spurious images, it is proposed to mask the accelerating electrode with a masking screen carried, in principle, to the same potential as the electrode, this screen being characterized by its rounded edges, with their convexity pointed towards the target. It is perforated with a central aperture, also provided with rounded edges.
    Type: Grant
    Filed: April 18, 1989
    Date of Patent: June 8, 1993
    Assignee: Thomson-CSF
    Inventors: Jean-Luc Ricaud, Gerard Guilhem
  • Patent number: 5202606
    Abstract: The invention relates to a cathode-ray tube 1 having an electron gun 3 positioned in a neck portion 2. The electron gun 3 is provided with a focusing structure 10 which includes a hollow tube 12 of electrically insulating material. A layer 14 of a material having a high resistance is applied to the inner surface of the hollow tube. The resistance layer 14 is shielded from a getter arrangement 44 positioned in the cathode ray tube 1.
    Type: Grant
    Filed: January 27, 1992
    Date of Patent: April 13, 1993
    Assignee: U.S. Philips Corporation
    Inventors: Gerardus A. H. M. Vrijssen, Willem M. Van Alphen, Ger-Wim J. Goorhuis
  • Patent number: 5107172
    Abstract: A charged-particle beam tube having an envelope of a dielectric material and a pattern yoke formed on the inner surface of the envelope. The pattern yoke has a pair of horizonal deflection electrodes and a pair of vertical deflection electrodes arranged alternately. The horizontal deflection electrodes have a greater circumferential width than the vertical deflection electrodes. The horizontal and vertical deflection electrodes are supplied with different bias voltages.
    Type: Grant
    Filed: May 2, 1989
    Date of Patent: April 21, 1992
    Assignees: Hitachi, Ltd., Nippon Hoso Kyokai
    Inventors: Kentaro Oku, Masakazu Fukushima, Mitsuhiro Kurashige, Norifumi Egami, Toshio Yamagishi
  • Patent number: 5045751
    Abstract: A cathode ray tube has an insulating layer formed at at least a part of the outer surface of a neck tube.The insulating layer is a layer obtained by coating and baking a sol prepared by dispersing one or two or more metal alkoxides and metal salts in a hydrophilic oligomer state by adding water and an acid to a solution having one or two or more metal alkoxides and metal salts dissolved in an organic solvent such as an alcohol.
    Type: Grant
    Filed: October 20, 1989
    Date of Patent: September 3, 1991
    Assignee: Asahi Glass Company Ltd.
    Inventors: Takashi Numata, Yusuke Kobayashi, Yoshihito Katayama, Junichi Iura, Toshiyasu Kawaguchi, Tsunehiko Sugawara
  • Patent number: 5038075
    Abstract: A traveling-wave deflection system comprising a pair of deflectors disposed opposite each other across the path of an electron beam from an electron gun to a screen in a cathode-ray tube. Each deflector has a helical conductor wound around a core structure generally extending along the beam path. If made solely of an insulating material as in the prior art, the core structures would be electrified in use of the CRT, with the consequent deflection defocusing and bright line displacement. Therefore, in order to avoid electrification, the core structures are each enveloped in an antielectrification layer of a conducting material having a higher resistivity than the helical conductor. An embodiment is also disclosed wherein the core structures are wholly of conductive material.
    Type: Grant
    Filed: October 26, 1989
    Date of Patent: August 6, 1991
    Assignee: Iwatsu Electric Co., Ltd.
    Inventors: Tsutomu Tobari, Osamu Akitsuki, Koshi Takano
  • Patent number: 5015925
    Abstract: Picture display device comprising a display tube with an electron gun having a tubular structure with an outer surface and an inner surface on which a helical resistance structure is provided in a layer of a material having a high electrical resistance for constituting a focusing lens. In the layer is also formed a coaxial correction element for generating an electric multi-pole field. The outer surface is provided with electrodes of readily electrically conducting material arranged opposite the correction element for capacitively coupling a dynamic correction signal into the correction element.
    Type: Grant
    Filed: January 8, 1990
    Date of Patent: May 14, 1991
    Assignee: U.S. Philips Corporation
    Inventors: Tjerk G. Spanjer, Gerardus A. H. M. Vrijssen
  • Patent number: 4988928
    Abstract: Picture display device comprising a display tube with an electron gun having a tubular structure with an outer surface and an inner surface on which a helical resistance structure of a material having a high electrical resistance constituting a focusing lens is provided. The outer surface is provided with an electrode of readily electrically conducting material arranged opposite at least a part of the focusing lens for capacitively controlling the focusing lens by means of a dynamically variable voltage the amplitude of which is a function of the position of the electron beam spot on the display screen.
    Type: Grant
    Filed: January 8, 1990
    Date of Patent: January 29, 1991
    Assignee: U.S. Philips Corporation
    Inventors: Gerardus A. H. M. Vrijssen, Willem Van Alphen
  • Patent number: 4988915
    Abstract: A color display tube is provided with a high resistance layer having a resistance between 10.sup.6 and 10.sup.10 ohms per square on the external portion of the tube envelope underneath the deflection coil system. The high resistance layer prevents arcing between the coil system and the envelope without adversely affecting the deflection field.
    Type: Grant
    Filed: December 27, 1985
    Date of Patent: January 29, 1991
    Assignee: U.S. Philips Corporation
    Inventor: Antonius P. F. Zegers
  • Patent number: 4988929
    Abstract: Picture display device comprising a display tube having an electron gun with an electrostatic focusing lens for generating a focusing lens field, which tube further comprises deflection means for generating a deflection field. The focusing lens field partly overlaps the deflection field. The focusing lens comprises a tubular structure having an inner surface on which a helical resistance structure of a material having a high electrical resistance is provided, which tubular structure has a coaxial input portion and a coaxial output portion, the output portion having dimensions which prevent the deflected electron beam from impinging upon the glass of the inner wall. Correction means may be provided for correcting errors caused by the advanced position of the focusing lens.
    Type: Grant
    Filed: January 8, 1990
    Date of Patent: January 29, 1991
    Assignee: U.S. Philips Corporation
    Inventors: Tjerk G. Spanjer, Gerardus A. H. M. Vrijssen, Willem M. Van Alphen
  • Patent number: 4980606
    Abstract: An electron beam focusing device for use in a cathode ray tube (CRT) including a first and a second conductor film each formed on the inner surface of a neck portion of the CRT, which are spaced apart from each other by a predetermined distance, and a resistive conductor film which connects the first and second conductor films with each other. The first conductor film is located before the second conductor film in a beam travelling direction. The additional conductor film has a higher resistivity than that of the first and second conductor films. The first conductor film is set at a higher potential than the second conductor film. A dark current flowing from a high potential side through the first conductor film, the resistive conductor film and the second conductor film produces a voltage drop across the resistive conductor film so that the surface potential of the resistive conductor film is stabilized, thus forming an electrostatic lens with a stabilized electric field.
    Type: Grant
    Filed: September 13, 1988
    Date of Patent: December 25, 1990
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Masaaki Yamauchi, Yasuo Tanaka
  • Patent number: 4977348
    Abstract: A cathode-ray tube (54) includes a bipotential electrode structure (50) that converges the electrons in an electron beam. The bipotential electrode structure includes a cylindrical metallic electrode (56) positioned within a neck portion (66) of an evacuated glass envelope (52) and an electrically resistive coating (58) on an interior surface (60) of the neck portion. The resistive coating has a terminal end (64) positioned adjacent the metallic electrode. An electrically and thermally conductive coating (62) on the interior surface of the neck portion covers the terminal end of the resistive coating and partly overlaps the metallic electrode. The conductive coating functions to prevent electric "punch-through" between the interior and exterior surfaces of the tubular envelope. The conductive coating also allows relatively efficient operation of a beam deflection apparatus.
    Type: Grant
    Filed: March 7, 1989
    Date of Patent: December 11, 1990
    Assignee: Tektronix, Inc.
    Inventor: Conrad J. Odenthal
  • Patent number: 4972118
    Abstract: An amalgam has a base metal including bismuth in an amount selected from the range between about 45 wt % and 65 wt %, and lead in an amount selected from the range between about 35 wt % and 55 wt %. The amalgam also includes mercury the amount of which is selected from the range between about 1 wt % and 12 wt % of the total amount of the amalgam. Such amalgam is sealed in a low mercury vapor pressure discharge lamp which operates at a medium bulb surface temperature to achieve a stable mercury vapor pressure over an extended amalgam temperature range.
    Type: Grant
    Filed: February 1, 1989
    Date of Patent: November 20, 1990
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takashi Yorifuji, Seiko Komoda
  • Patent number: 4961023
    Abstract: Cathode ray tube having an electron gun which comprises a beam-shaping part and a focusing structure, which structure comprises a hollow tube with a helical electrically conducting glass-enamel layer on the inner surface. Together with the hollow tube, the components of the beam-shaping part are secured to axial mounting rods via metal supporting elements. The tube has a first and a second end face each of which is fixedly connected in one embodiment to a metal plate having a coaxial opening provided with a flange, which flange projects into the tube and is fused in an electrically conducting manner to the electrically conducting glass-enamel layer of the focusing structure.
    Type: Grant
    Filed: September 18, 1989
    Date of Patent: October 2, 1990
    Assignee: U.S. Philips Corporation
    Inventors: Gerardus A. H. M. Vrijssen, Ronald Van Rijswijk
  • Patent number: 4961022
    Abstract: A display tube comprising an electron gun having a beam-shaping part and a focusing structure. The focusing structure comprises an elongate hollow structure with a high-ohmic resistive layer provided on the inner and/or outer surface and comprises means for forming a non-rotationally symmetrical lens element in the area of the focusing structure. This may be a structure generating an electric multipole (for example, dipole or quadrupole) which may be incorporated particularly in the high-ohmic resistive layer.
    Type: Grant
    Filed: April 24, 1989
    Date of Patent: October 2, 1990
    Assignee: U.S. Philips Corporation
    Inventors: Gerardus J. A. Hellings, Antonius W. F. Van Der Heijden, Erich E. Himmelbauer, Gerardus A. H. M. Vrijssen, Tjerk G. Spanjer, Willem M. Van Alphen, Jeroen Van Engelshoven
  • Patent number: 4945283
    Abstract: Cathode ray tube having an electron gun positioned in the neck portion, the gun comprising a beam-forming part and a focusing structure and the beam-forming part comprising at least a cathode and a metal electrode plate provided with a central aperture, and the focusing structure comprising a hollow tube of an electrically insulating material with inner and outer surfaces and with a layer of high-ohmic resistive material on at least one of the surfaces. The electrodes of the beam-forming part of the electron gun are secured via metal pins to rods for forming an assembly. The hollow tube is directly secured to the metal electrode plate for the purpose of correct alignment. The tube has a first and a second end face, the first end face in one embodiment having a metal plate with a coaxial aperture, and the said metal plate is fixedly connected to the metal electrode plate of the beam-shaping part of the electron gun in such a way that their apertures are coaxial.
    Type: Grant
    Filed: January 23, 1989
    Date of Patent: July 31, 1990
    Assignee: U.S. Philips Corporation
    Inventors: Antonius W. F. Van Der Heijden, Gerardus J. Hellings, Erich E. Himmelbauer, Tjerk G. Spanjer, Gerardus A. H. M. Vrijssen
  • Patent number: 4933597
    Abstract: A cathode ray tube comprises an envelope, an electron beam source positioned at one end of the envelope, a target positioned at another end of the envelope, a first electrode supplied with low potential, and a second electrode supplied with high potential, the first and second electrodes being positioned between the electron beam source and the target, where extensions from the first electrode and extensions from the second electrode are combined with each other in zigzag form and intermediate potential is formed at intermediate position between the first electrode and the second electrode.
    Type: Grant
    Filed: October 19, 1989
    Date of Patent: June 12, 1990
    Assignee: Sony Corporation
    Inventors: Takehiro Kakizaki, Shoji Araki, Masatake Hayashi
  • Patent number: 4910429
    Abstract: A cathode ray tube comprises an envelope; an electron beam source positioned at one end of the envelope; a target positioned at another end of the envelope opposite to the electron beam source; a mesh electrode positioned opposite to the target; and an electrostatic lens means positioned between the electron beam source and the mesh electrode, the lens means having a first electrode, a second electrode and a third electrode respectively positioned along the electron beam path to focus the electron beam, the second electrode being divided into four arrow or zig-zag patterns to deflect the electron beam.
    Type: Grant
    Filed: August 23, 1984
    Date of Patent: March 20, 1990
    Assignee: Sony Corporation
    Inventors: Takehiro Kakizaki, Shoji Araki