Patents Represented by Attorney Dennis H. Irlbeck
  • Patent number: 6488166
    Abstract: The present invention relates to an implosion prevention band for a CRT comprising an evacuated envelope having a mask and corresponding faceplate panel with sidewalls joined to a funnel. The faceplate panel and sidewalls form external corner surfaces and a peripheral inside blend radius. An implosion prevention band surrounds and closely hugs at least an edge of the external corner surfaces of the faceplate panel. The band extends along the exterior surface of the sidewall such that the width of the band is at or near the inside blend radius of the faceplate panel. The band is under tension to produce radially inwardly directed force components through the corners of the faceplate panel and primarily near the blend radius to produce a high degree of implosion protection for the CRT.
    Type: Grant
    Filed: December 13, 2000
    Date of Patent: December 3, 2002
    Assignee: Thomson Licensing S.A.
    Inventors: Harry Robert Swank, Stephen Thomas Opresko
  • Patent number: 6483238
    Abstract: The invention applies to plasma display panels consisting of two facing plates enclosing a discharge space and comprising an array of discharge cells (X1, X2, . . . , X5, etc.). A display panel according to the invention has at least one porous layer which contains less than 10% of a hardening agent. The porous layer is either a barrier layer or a gettering layer.
    Type: Grant
    Filed: December 17, 1999
    Date of Patent: November 19, 2002
    Assignee: Thomson Plasma
    Inventors: Guy Baret, Jean-Yves Brun, Pierre Paul Jobert, Agide Moi, Yvan Raverdy, Serge Salavin
  • Patent number: 6477863
    Abstract: The invention concerns a method for producing on a plasma panel faceplate, a dielectric coating comprising embossed patterns. The invention is characterized in that a vitreous coat is produced on the plasma panel faceplate; a mould bearing embossed patterns is applied on the vitreous coat, then the faceplate and the mould are heated until a creep effect of the vitreous coat is obtained which causes the latter to match the form of the mould, thereby enabling to produce simultaneously and with improved quality with respect to prior art, a dielectric coating bearing embossed patterns such as for instance barriers. The invention is particularly applicable to alternating plasma panel.
    Type: Grant
    Filed: December 7, 1999
    Date of Patent: November 12, 2002
    Assignee: Thomson Multimedia
    Inventor: Guy Baret
  • Patent number: 6469429
    Abstract: A color cathode-ray tube comprises a mask, intended for selecting the colors, which is tensioned on a support frame, the frame/mask assembly including means for preventing the tensioned mask from vibrating under the influence of external vibrations. These means comprise at least one mechanical oscillator, coupled to the mask, in the form of metal strips produced by partial cutting of the surface of the peripheral region of the mask.
    Type: Grant
    Filed: September 22, 2000
    Date of Patent: October 22, 2002
    Assignee: Thomson Licensing S.A.
    Inventor: Fabrizio Berton
  • Patent number: 6462487
    Abstract: A method for operating a cathode-ray tube electron gun, suitable for multimode operation, for example, in order to display television images and multimedia images of the SVGA, XGA type, in which the zone for forming the electron beam generated by the cathode has at least two control electrodes. The two control electrodes are connected to voltage sources in such a way that the potential difference between the two control electrodes increases when the beam current decreases.
    Type: Grant
    Filed: August 21, 2000
    Date of Patent: October 8, 2002
    Assignee: Thomson Tubes & Displays, S.A.
    Inventors: Michel Lefort, Jean-Pierre Garnier
  • Patent number: 6455992
    Abstract: The present invention provides an improvement in a color picture tube having a tension mask supported by a support frame mounted within said tube. The mask has a significantly lower coefficient of thermal expansion than the frame. The frame has two substantially parallel cantilevered members, each member has a distal edge to which the tension mask is attached. At least one of the distal edges has two sections separated by a gap therebetween. The two sections include an inner section and an outer section. The mask is glued to the inner section and is welded to the outer section.
    Type: Grant
    Filed: April 12, 1999
    Date of Patent: September 24, 2002
    Assignee: Thomson Licensing S.A.
    Inventors: Mark Allen Thomson, Edward Richard Garrity, Jr., James Francis Edwards
  • Patent number: 6448711
    Abstract: The invention relates to image display screens using a cell matrix to form an image. More particularly, the invention relates to means for facilitating relative positioning of various elements during manufacturing. The inventive screen consists of at least two electrode networks. One of the characteristics of the invention is that at least one of said networks consists of “variable direction” electrodes which are shaped in such a way that they spread out and then return towards their longitudinal axis to intersect and pass alternatively from one side to the other of said axis. The spread of a variable direction electrode in relation to the longitudinal axis has an amplitude depending on the position of the electrode in respect to a reference position. This arrangement provides appropriate dimensional leeway to facilitate superpositioning of several masks of varying dimensions. The invention is used in “flat screens”, specially plasma panels.
    Type: Grant
    Filed: December 6, 1999
    Date of Patent: September 10, 2002
    Assignee: Thomson Licensing S.A.
    Inventors: Serge Salavin, Jacques Deschamps
  • Patent number: 6444380
    Abstract: A method of manufacturing a luminescent screen assembly for a color cathode-ray tube (CRT) is disclosed. The luminescent screen assembly is formed on an interior surface of a faceplate panel of the CRT. The luminescent screen assembly includes color-emitting phosphors that are sequentially deposited over portions of the interior surface of the faceplate panel of the CRT. A filming composition is electrostatically sprayed over the color-emitting phosphors. The filming composition comprises an acrylic polymer dissolved in a solvent mixture of one or more high-volatility solvents combined with one or more low-volatility solvents.
    Type: Grant
    Filed: January 16, 2001
    Date of Patent: September 3, 2002
    Assignee: Thomson Licensing S. A.
    Inventors: Himanshu Mukundray Patel, Jeffrey Herbert Harrell, Charles Henry Knepfler
  • Patent number: 6437838
    Abstract: A display apparatus 10 comprises at least one speaker 16 and a cathode-ray tube (CRT) 14 secured within an enclosure 12 to a plurality of mounting bosses 50. The cathode-ray tube 14 has an evacuated envelope 17 with a substantially rectangular-shaped faceplate panel 18 having four corners and a viewing portion 26 extending to a peripheral sidewall 28. The viewing portion 26 has a luminescent line screen 32 on the interior surface thereof The viewing portion 26 including two orthogonal axes, a major axis, X, parallel to a longer dimension of the viewing portion and a minor axis, Y, parallel to a smaller dimension of the viewing portion. The CRT 14 has therein an electron gun 38, capable of generating at least one electron beam, aligned along a central longitudinal axis, Z, of the CRT that is perpendicular to the major and minor axes. The CRT 14 also has a color selection electrode 36 in proximity to the interior surface of the viewing portion 26 of the faceplate panel 18.
    Type: Grant
    Filed: January 30, 2001
    Date of Patent: August 20, 2002
    Assignee: Thomson Licensing S. A.
    Inventors: Harry Robert Swank, Zygmunt Marian Andrevski
  • Patent number: 6437505
    Abstract: The present invention relates to a plasma panel comprising a first tile called the rear tile and a second tile called the front tile, the two tiles being joined together with a distance of separation defining a space filled with gas, a first array of electrodes which is formed from a set of two parallel electrodes, called the sustaining electrodes, and which is placed on one of the tiles, a second array of electrodes called the addressing electrodes which is placed on the other tile, and an array of barriers which is placed on one of the tiles parallel to the array of addressing electrodes. According to the invention, the array of barriers is positioned on the tile carrying the first array of electrodes, the barriers having a height of less than the distance of separation between the two tiles and the separation between the two tiles is obtained by specific spacing means.
    Type: Grant
    Filed: November 29, 1999
    Date of Patent: August 20, 2002
    Assignee: Thomson Licensing S.A.
    Inventors: Guy Baret, Pierre Paul Jobert, Yvan Raverdy
  • Patent number: 6407488
    Abstract: A color picture tube having a tension mask attached to a support frame, wherein the mask if made from a material having a significantly lower coefficient of thermal expansion than the coefficient of thermal expansion of the material of the frame. The frame tensions the mask to have a fundamental resonant frequency of 90 Hz±20 Hz.
    Type: Grant
    Filed: April 1, 1999
    Date of Patent: June 18, 2002
    Assignee: Thomson Licensing S.A.
    Inventor: Frank Rowland Ragland, Jr.
  • Patent number: 6400082
    Abstract: A plasma display panel having a back substrate, a first set of parallel electrodes associated to the back substrate, a front transparent substrate, a second set of electrodes associated to the front substrate, the electrodes of the second set having a direction which is transverse with respect to the direction of the electrodes of the first set, and partition walls which are situated between the back and the front substrates, and extend in the direction of the second set of electrodes. This display is characterized in that: each electrode of the second set faces the edge of a corresponding partition wall, and each electrode of the second set comprises, for each cell, a transparent protrusion extending towards the side of the partition wall corresponding to this cell. The display may be of the matrix type or of the coplanar type.
    Type: Grant
    Filed: March 18, 1999
    Date of Patent: June 4, 2002
    Assignee: Thomson Licensing, S. A.
    Inventor: Yoshiharu Chikazawa
  • Patent number: 6400079
    Abstract: A plasma panel includes a front faceplate and a rear faceplate between which are constituted cells. The two faceplates are assembled together by bracing means which determine the distance between the two faceplates. The plasma panel further includes barriers arranged between the two faceplates, and serving in particular to prevent the discharges of one cell from extending to the other neighboring cells. The invention is characterized in that the height of the barriers is less than the distance between the faceplates. This arrangement provides a conditioning effect to the cells to thereby enabling them to be activated more speedily. The invention is in particular applicable to plasma panels using luminophores of different colours.
    Type: Grant
    Filed: December 7, 1999
    Date of Patent: June 4, 2002
    Assignee: Thomson Licensing, S.A.
    Inventors: Guy Baret, Agide Moi
  • Patent number: 6395344
    Abstract: The present invention relates to a method for carrying out a magnesium oxide based deposition on the dielectric surface of a glass plate of a display panel. The method includes the creation of a mist from a metalorganic compound of magnesium dissolved in a solvent, the conveying of the mist to the dielectric surface of the plate, the evaporation the solvent when approaching the dielectric surface of the plate which is taken to a temperature of about 380° to 430°, and the pyrolysis of the metalorganic compound leading to the magnesium oxide based deposit on the surface of the plate and the evaporation of the organic radical of the compound, this deposit being practically waterproof. The method is especially useful in the manufacture of plasma panels.
    Type: Grant
    Filed: March 16, 2000
    Date of Patent: May 28, 2002
    Assignee: Thomson multimedia
    Inventors: Guy Baret, Michel Labeau, Olivier Renault
  • Patent number: 6369494
    Abstract: The invention relates to a cathode structure intended to be inserted into an electron gun for a cathode-ray tube. The cathode comprises a cathode body on the end of which is placed an emissive pellet, the cathode body being held in place inside a sheath by supporting means which comprise: a first series of branches, each branch being connected on one side to the cathode body and on the other side to an intermediate piece 30; and a second series of branches, each branch being connected on one side to the sheath and on the other side to the same intermediate piece.
    Type: Grant
    Filed: October 4, 1999
    Date of Patent: April 9, 2002
    Assignee: Thomson Tubes & Displays, S.A.
    Inventors: Jean-Claude Pruvost, Jean Remy Adamski, Francois Fichet
  • Patent number: 6326110
    Abstract: In accordance with the present invention, a method of electrophotographically manufacturing a luminescent screen assembly on an interior surface of a faceplate panel 17 of a color CRT 10 includes the steps of: coating the surface of the panel with a conductive solution to form a volatilizable organic conductive layer 32, and overcoating the organic conductive layer 32 with a photoconductive solution to form a volatilizable photoconductive layer 34. The conductive solution comprises the organic polymer 3,4-polyethylene dioxythiophene polystyrene sulphonate (PEDT/PSS); a methanol-soluble polymer or co-polymer selected from the group consisting of polyvinylpyrrolidone (PVP), poly (vinyl pyridine-co-vinyl acetate) (PVPy-VAc), polymethacrylic acid (PMAA), poly (hydroxyethylacrylate-co-methacrylic acid) (PHEA-MAA) and poly (hydroxyethyl methacrylate) (PHEMA) to reduce organic residue; and a solvent.
    Type: Grant
    Filed: August 23, 1999
    Date of Patent: December 4, 2001
    Assignee: Thomson Licensing S.A.
    Inventors: Pabitra Datta, Gregory James Cohee, Nitin Vithalbhi Desai, Steven Anthony Colbert, Kangning Liang
  • Patent number: 6300712
    Abstract: A color picture tube includes an evacuated envelope having a rectangular faceplate panel with two approximately parallel long sides, two approximately parallel short sides and four corners. The panel comprises a faceplate and a peripheral sidewall, and includes a shadow mask-frame assembly mounted therein by springs located at the four corners of the panel. The springs have apertures engaging studs that are located on the peripheral sidewall at the four corners. The panel includes additional studs on the peripheral sidewall located near the centers of at least one pair of approximately parallel sides of the panel. Brackets are located on opposite sides of the shadow mask-frame assembly at the locations of the additional studs. The brackets include slots therein. The slots are open on sides thereof facing the faceplate. The additional studs are positioned within the slots.
    Type: Grant
    Filed: February 19, 1999
    Date of Patent: October 9, 2001
    Assignee: Thomson Licensing S.A.
    Inventors: Istvan Gorog, Anthony Socrates Poulos, Kelly Eugene Hamm
  • Patent number: 6280276
    Abstract: The present invention provides a method of attaching a tension mask to a frame to achieve desired tensions at a plurality of locations across the mask, wherein the frame has two opposite sides between which the mask is to be attached. Specific forces are applied from each of a plurality of separate actuators at positions, along each of the two opposite sides of the frame, that affect the mask tensions respectively at the plurality of locations across the mask. Each of the actuators is individually controlled to apply a specific force to a frame side that is directly related to the desired mask tension required at a particular mask location. While the specific forces are applied by the actuators, the mask is attached to the two opposite sides of the frame. Thereafter, the forces on the sides are released.
    Type: Grant
    Filed: December 14, 1999
    Date of Patent: August 28, 2001
    Assignee: Thomson Licensing S.A.
    Inventors: Alan Weir Bucher, Frank Rowland Ragland, Jr.
  • Patent number: 6274975
    Abstract: The present invention provides an improvement in a color picture tube having a tension mask supported by a support frame mounted within the tube. The mask includes an active apertured portion formed by a plurality of parallel vertically extending strands, between which are elongated operational apertures through which electron beams pass during operation of the tube. Top and bottom border portions, outside the active apertured portion of the mask, have additional apertures therein that are aligned with the longitudinal centerlines of the strands.
    Type: Grant
    Filed: April 1, 1999
    Date of Patent: August 14, 2001
    Assignee: Thomson Licensing S.A.
    Inventors: Joseph Arthur Reed, Anthony Socrates Poulos, Frank Rowland Ragland, Jr.
  • Patent number: 6246164
    Abstract: A color picture tube has a tensioned mask supported by a support frame mounted within said tube. The mask has a significantly lower coeffiecient of thermal expansion than the frame. Intermediary members are located between the mask and the frame. The intermediary members are of a material similar to that of the mask. Each of the members is attached to the frame at a single location and the mask is attached to edges of the intermediary members. Further included are guides for holding the intermediary members to the frame while permitting expansion of the frame relative to the intermediary members.
    Type: Grant
    Filed: April 1, 1999
    Date of Patent: June 12, 2001
    Assignee: Thomson Licensing S.A.
    Inventors: Philip Michael Heyman, Richard William Nosker, Joey John Michalchuk, Istvan Gorog