Producing Cathode-ray Tube Or Element Thereof Patents (Class 430/23)
  • Patent number: 9645302
    Abstract: A backlight unit includes a light source providing a blue light; a light guide plate of glass at a side of the light source; an optical sheet on the light guide plate; a reflective sheet under the light guide plate; and an optic change part including a yellow fluorescent material, wherein the blue light is changed into a white light by the optical change part.
    Type: Grant
    Filed: November 7, 2014
    Date of Patent: May 9, 2017
    Assignee: LG Display Co., Ltd.
    Inventors: Seok-Hwan Oh, Young-Min Kweon, Du-Ho Jo
  • Patent number: 9601449
    Abstract: A mask unit for depositing a thin layer in a display device. The mask unit includes: a bead mask support which includes a plate; and a bead mask which is placed on the bead mask support.
    Type: Grant
    Filed: August 14, 2013
    Date of Patent: March 21, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventor: Jong Yun Kim
  • Patent number: 8007967
    Abstract: Disclosed is a shadow mask having a fine slit that can improve precision and resolution of a pattern by reducing side etching during an etching process of a mask substrate, and a manufacturing method thereof. The shadow mask includes a mask substrate, a slit region formed by penetrating through the mask substrate, the slit region having a plurality of undercut portions at respective sides thereof, each undercut portion having a unit thickness, and a shadow region provided in the mask substrate, the shadow region corresponding to a region other than the slit region.
    Type: Grant
    Filed: June 27, 2006
    Date of Patent: August 30, 2011
    Assignee: LG Display Co., Ltd.
    Inventors: Soon Sung Yoo, Oh Nam Kwon
  • Publication number: 20080231170
    Abstract: A light-emitting device comprises a light-emitting element 3 that is provided on a substrate 2 and emits excitation light, and a wavelength converter 4 that converts the excitation light into visible light. The visible light is output light. The wavelength converter 4 comprises a plurality of wavelength conversion layers 4a, 4b and 4c which respectively contain, as phosphors, at least one type of semiconductor ultrafine particles having a mean particle size of not more than 20 nm and at least one type of fluorescent substance having a mean particle size of not less than 0.1 ?m in a resin matrix. Thereby, self-quenching of phosphors is reduced and high luminous efficiency is attained.
    Type: Application
    Filed: January 26, 2005
    Publication date: September 25, 2008
    Inventors: Fukudome Masato, Shigeoka Toshiaki, Nakagawaji Fujito, Ozaki Tetsuaki
  • Patent number: 7179572
    Abstract: The present invention relates to a fluorescent screen forming method, a fluorescent screen forming apparatus and a cathode-ray tube. In the fluorescent screen forming method according to the present invention, a transfer roller lowers a transfer sheet to somewhere above the inner surface of the panel and the transfer roller moves up to the end edge positions of the inner surface of the panel, whereafter the transfer roller moves downwards onto the end edges of the inner surface of the panel in unison with the transfer film to start pressing the transfer film. Therefore, the transfer roller can reach the end edges of the panel, and hence component layers of a fluorescent screen can be transferred up to the end edges of the inner surface of the panel. A fluorescent screen forming apparatus according to the present invention includes a transfer film supply means, a transfer roller, and a control means, wherein operations of the above-mentioned transfer method are executed.
    Type: Grant
    Filed: May 31, 2002
    Date of Patent: February 20, 2007
    Assignee: Sony Corporation
    Inventors: Katsutoshi Ohno, Koji Fujita
  • Patent number: 7008739
    Abstract: The present invention is to provide a process for manufacturing a fluorescent film wherein the order of coating the fluorescent films of a color Braun tube and the thickness of the film are adjusted to reduce the amount of red fluorescent material employed for red fluorescent film without deteriorating the quality of the red fluorescent film, thereby lowering the cost for manufacturing. The process first forms the red fluorescent film on the panel of a color Braun tube and then forms the blue and green fluorescent films subsequently thereafter.
    Type: Grant
    Filed: April 16, 1996
    Date of Patent: March 7, 2006
    Assignee: LG Electronics Inc.
    Inventors: Seoug Wan Kang, Kyung Ho Lee
  • Patent number: 6875542
    Abstract: A method of manufacturing a mask includes attaching to a first substrate formed with an opening a second substrate formed with a plurality of penetrating holes. The plurality of penetrating holes are disposed inside the opening. The first substrate and the second substrate may be joined together by anode coupling. First and second alignment marks may be used for positioning the second substrate and the first substrate when attaching the second substrate to the first substrate.
    Type: Grant
    Filed: September 20, 2002
    Date of Patent: April 5, 2005
    Assignee: Seiko Epson Corporation
    Inventor: Shinichi Yotsuya
  • Patent number: 6803711
    Abstract: A mask for a color cathode ray tube (CRT) and a manufacturing method thereof are provided. This mask includes a plurality of strips isolated from each other at predetermined intervals in parallel, and a plurality of bridges for forming slots through which electron beams pass by connecting adjacent strips to each other. In this mask, each of the bridges between adjacent strips has a first curved portion formed on the side from which electron beams come out, and a second curved portion formed on the side upon which electron beams are incident. The first curved portion has a first width in the direction perpendicular to the length direction of the strips, and extends in the length direction of the strips. The second curved portion has a second width that is smaller than the first width in the length direction of the adjacent strips.
    Type: Grant
    Filed: August 23, 2001
    Date of Patent: October 12, 2004
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Young-bin Im, Deok-hyeon Choe
  • Publication number: 20030222562
    Abstract: A shadow mask for a cathode ray tube includes an aperture area having a plurality of apertures passing electron beams, a non-aperture area extending a predetermined distance from a circumference of the aperture area and a skirt extending a predetermined distance from an outside circumference of the non-aperture area and bent at a predetermined angle to the non-aperture area, wherein the aperture area has predetermined curvature radii, and wherein if a curvature radius in a horizontal direction of the aperture area is Rhs, and a curvature radius in a vertical direction is Rvs, the following condition is satisfied,
    Type: Application
    Filed: March 28, 2003
    Publication date: December 4, 2003
    Applicant: SAMSUNG SDI CO., LTD.
    Inventors: Sang-Ho Jeon, Do-Hun Pyun
  • Publication number: 20030219657
    Abstract: A method and composition for 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 has a patterned light-absorbing matrix thereon. The matrix defines a first set of fields, a second set of fields, and a third set of fields. An aqueous pigment suspension is applied to the first set of fields. The aqueous pigment suspension comprises a pigment, one or more surface-active agents and at least one non-pigmented oxide particle. The at least one non-pigmented oxide particle has a size that is less than that of the pigment.
    Type: Application
    Filed: May 22, 2002
    Publication date: November 27, 2003
    Inventor: Farzad Parsapour
  • 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
  • Publication number: 20030194622
    Abstract: After forming a phosphor film on an inner face of a front panel, light exposure is performed with respect to the phosphor film by irradiating light from an exposure light source onto the phosphor film through an exposure lens. The exposure lens has a concave incidence surface on which light from the exposure light source is incident, and the incidence surface has an average radius of curvature of 100 mm to 500 mm. Thus, light to which peripheral portions are exposed can have a smaller incident angle with respect to the incidence surface of the exposure lens, thereby allowing the reflectance of the light to be decreased. As a result, even in light exposure with respect to a phosphor film of a color picture tube with a wide deflection angle, an amount of light for the light exposure can be secured in the peripheral portions.
    Type: Application
    Filed: April 8, 2003
    Publication date: October 16, 2003
    Applicant: Matsushita Electric industrial Co., Ltd.
    Inventor: Kumao Ichinose
  • Publication number: 20030059690
    Abstract: A method of manufacturing a mask includes attaching to a first substrate formed with an opening a second substrate formed with a plurality of penetrating holes. The plurality of penetrating holes are disposed inside the opening. The first substrate and the second substrate may be joined together by anode coupling. First and second alignment marks may be used for positioning the second substrate and the first substrate when attaching the second substrate to the first substrate.
    Type: Application
    Filed: September 20, 2002
    Publication date: March 27, 2003
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Shinichi Yotsuya
  • Patent number: 6491831
    Abstract: A shadow mask for a cathode ray tube includes through-holes defined by first and second recessed formed at first and second surfaces of the shadow mask, respectively. Each through-hole has a first wall farther away from a center of the shadow mask than a second wall thereof. The second recess has a smaller size than that of the first recess. The first wall is formed of a first wall portion defined by an inner surface of the first recess and a second wall portion defined by an inner surface of the second recess. The second wall portion of through-holes located at a peripheral region of the first region has a configuration such that electron beams reflected therefrom are directed to an inner surface of the first recess to thereby reduce electron beams reflected therefrom in directions different from a direction in which the electron beams are originally directed before the electron beams enter the shadow mask.
    Type: Grant
    Filed: July 17, 2000
    Date of Patent: December 10, 2002
    Assignee: NEC Corporation
    Inventor: Nobumitsu Aibara
  • Patent number: 6455213
    Abstract: A phosphor surface formation method for an image display apparatus is disclosed. This method is characterized in that a rounded phosphor material having an aspect ratio(=shorter axis/longer axis) of 0.8˜1.0 is used as a phosphor material, and an average particle size(d50: the particle size in which the volume of the whole particles is 50%) is in a range of 1˜8 &mgr;m for thereby forming a phosphor surface wherein the phosphor surface is formed by manufacturing a phosphor slurry including a phosphor material, coating the phosphor slurry on an upper surface of the panel, light-exposing the same using a ultraviolet ray, and removing a non-exposed portion by developing using a pressurized pure water.
    Type: Grant
    Filed: January 4, 2000
    Date of Patent: September 24, 2002
    Assignee: LG Electronics, Inc.
    Inventor: Keun Pil Lee
  • Patent number: 6447963
    Abstract: A light quantity correction filter that can implement the desired transmittance distribution precisely and easily without complicating an exposure system, a method of making the light quantity correction filter, and a method of manufacturing a color cathode ray tube using the light quantity correction filter are provided.
    Type: Grant
    Filed: October 4, 1999
    Date of Patent: September 10, 2002
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Hiromi Wakasono
  • 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: 6432592
    Abstract: A shadow mask for a color CRT includes an effective face having a plurality of electron beam through holes and having a predetermined curvature; and a skirt unit extendedly bent at an outer portion of the effective face at a predetermined angle in the axial direction of the CRT, so as to be combined to a frame, wherein the skirt unit of the shadow mask has a plurality of vertical beads in parallel to the axial direction of the CRT and at least one horizontal bead formed crosswise in the lengthwise direction almost perpendicular to the vertical bead. With this structure, the strength property of the skirt unit of the shadow mask is improved to thereby minimize the widening degree of the skirt occurring in mounting the mask. Also, the curvature deformation such as mask sinking is prevented, thereby improving the quality of the color CRT.
    Type: Grant
    Filed: April 21, 2000
    Date of Patent: August 13, 2002
    Assignee: LG Electronics Inc.
    Inventor: Seung Tae Ryu
  • Publication number: 20020094486
    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: Application
    Filed: January 16, 2001
    Publication date: July 18, 2002
    Inventors: Himanshu Mukundray Patel, Jeffrey Herbert Harrell, Charles Henry Knepfler
  • Patent number: 6421187
    Abstract: A photosensitive layer of or for a cathode ray tube is illuminated by means of a laser illumination arrangement. The laser illumination arrangement comprises a homogenizer which serves to reduce the coherence of the laser beam.
    Type: Grant
    Filed: September 13, 2001
    Date of Patent: July 16, 2002
    Assignee: Koninklijke Philips Electronics N. V.
    Inventors: Tewe Hiepke Heemstra, Geert Jan Van Der Meer
  • Patent number: 6421507
    Abstract: A screen having a dotted structure of apertures in a black matrix and electroluminescent material in the apertures is produced on a panel for a color display device. A photosensitive material on the panel is exposed to light emitted by a point source. The light is passed through a segmented lens and a mask. The segmented lens has an array of facets with boundaries between them. At least two of the facets have respective top surfaces inclined at mutually different angles. Each facet of the array of facets is provided with a light-refracting means having a base surface coinciding with its top surface and at least a first and a second light-refracting surface disposed at predetermined angles with respect to the base surface, thereby creating a number of virtual light sources corresponding to the number of light-refracting surfaces.
    Type: Grant
    Filed: April 14, 2000
    Date of Patent: July 16, 2002
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Tewe H. Heemstra
  • Patent number: 6391504
    Abstract: A phosphor pattern for a field emission display panel (FED) is provided. The phosphor pattern is formed by a process whichh comprises the steps of: (I) forming (A) a photosensitive resin composition layer containing a phosphor on a substrate to which a conductive layer is formed; (II) selectively irradiating active light to (A) the photosensitive resin composition layer containing a phosphor, for forming a pattern; (III) selectively removing (A) the photosensitive resin composition layer to which active light has been selectively irradiated by development, to form the pattern; and (IV) calcining the pattern to remove an unnecessary portion, to form the phosphor pattern. Also provided ar this process for forming the phosphor pattern, a photosensitive element for a FED and a field emission display panel.
    Type: Grant
    Filed: May 22, 1998
    Date of Patent: May 21, 2002
    Assignee: Hitachi Chemical Co., Ltd.
    Inventors: Seiji Tai, Yoshiyuki Horibe, Hiroyuki Tanaka, Takeshi Nojiri, Kazuya Satou, Naoki Kimura, Mariko Shimamura
  • Publication number: 20020039693
    Abstract: In the production or a shadow mask, the through-holes for passing an electron beam are formed by etching of the Fe—Ni alloy. The variation in diameter of apertures is prevented by dispersing 2000 or more of precipitates and inclusions from 0.01 &mgr;m to 5 &mgr;m in diameter on the surface of said material per mm2. The Fe—Ni alloy of from 34 to 38% of Ni, not more than 0.5% of Mn, and if necessary, from 5 to 40 ppm of B, and from 5 to 40 ppm of N, the balance being Fe and unavoidable and incidental impurities with the proviso of 0.10% or less of C, 0.30% or less of Si, 0.30% or less of Al, 0.005% or less of S, and 0.005% or less of P.
    Type: Application
    Filed: July 17, 2001
    Publication date: April 4, 2002
    Inventor: Ikuya Kurosaki
  • 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
  • Publication number: 20010046633
    Abstract: A light quantity correction filter that can implement the desired transmittance distribution precisely and easily without complicating an exposure system, a method of making the light quantity correction filter, and a method of manufacturing a color cathode ray tube using the light quantity correction filter are provided.
    Type: Application
    Filed: October 4, 1999
    Publication date: November 29, 2001
    Inventor: HIROMI WAKASONO
  • Patent number: 6312860
    Abstract: Disclosed are a phosphor composition comprising an inorganic phosphor, capable of emitting blue color upon ultraviolet irradiation, and copper or a copper compound; a phosphor paste comprising the phosphor composition dispersed in a dispersing medium; and a photosensitive dry film formed from the phosphor paste.
    Type: Grant
    Filed: October 14, 1998
    Date of Patent: November 6, 2001
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Naoki Gotoh, Masaaki Asano
  • Patent number: 6300021
    Abstract: The invention includes an apparatus 40 for developing a latent charge image formed on a photoreceptor 36 disposed on an interior surface of a faceplate panel 12. The apparatus 40 comprises a developer tank 42 having a sidewall 44 closed at one end by a bottom portion 46 and at the other end by a panel support 48 having an opening 50 therethrough to provide access to the faceplate panel 12. A back electrode 52 has a potential applied thereto to establish an electrostatic drift field between the back electrode and the photoreceptor 36, which is grounded. Triboelectrically-charged, dry-powdered, light emitting phosphor material, having a charge of the same polarity as the potential applied to the back electrode 52, is sprayed into the developer tank 42, between the back electrode 52 and the faceplate panel 12. The triboelectrically charged phosphor material is directed toward the photoreceptor 36 on the faceplate panel 12 by the applied electrostatic drift field.
    Type: Grant
    Filed: June 14, 1999
    Date of Patent: October 9, 2001
    Assignee: Thomson Licensing S.A.
    Inventors: Istvan Gorog, David Paul Ciampa
  • Publication number: 20010008825
    Abstract: A method of manufacturing a panel assembly used to assemble a display panel intends to achieve an alignment-free between barrier ribs and a fluorescent layer and minimize the waste of a barrier rib material for cost reduction. On a support body 51 which is not a substrate, formed are a plurality of walls 281 through 283 made of a fluorescent material that are belt-shaped in plan view arranged in stripes, an electrode material layer a1, and a barrier rib material filling spaces between the walls. The support body 51 and a substrate 21 are coupled so that the barrier rib material faces the substrate. The walls 281 through 283, the electrode material layer a1 and the barrier rib material 291 are transferred in one step to the substrate 21, and thus a panel assembly 20 having barrier ribs 29, electrodes A and fluorescent layers 28R, 28G and 28B is obtained.
    Type: Application
    Filed: January 29, 2001
    Publication date: July 19, 2001
    Inventors: Osamu Toyoda, Shinji Tadaki, Akira Tokai, Keiichi Betsui
  • Patent number: 6258496
    Abstract: A stretched mask having a high tensile strength and favorable high-temperature creep properties and free from tape twist, and a material for the stretched mask. A low-carbon steel sheet containing 70 ppm to 170 ppm of nitrogen on a weight basis is heat-treated at a temperature at which recrystallization does not take place. The heat-treated material is provided with a resist pattern for forming apertures and subjected to etching to form apertures.
    Type: Grant
    Filed: February 8, 1999
    Date of Patent: July 10, 2001
    Assignees: Toyo Kohan Co., Ltd., Dai Nippon Printing Co., Ltd.
    Inventors: Akira Makita, Yutaka Matsumoto, Taizo Sato, Yoshikazu Watanabe
  • Publication number: 20010006320
    Abstract: Method for fabricating a screen in a color CRT, in which, in formation of a color filter film and a fluorescent film on the same time, a pigment layer is formed, a photo sensitive resin solution is coated thereon, a fluorescent material layer is sprayed thereon, and the pigment layer and the fluorescent film are exposed and developed, to prevent the pigment layer and the fluorescent film from peeling off and to form thin and close packed fluorescent films on the photo sensitive resin solution, for enhancing a contrast and a color purity as well as a luminance and cutting characteristics, the color display having three color (blue, green, and red) color filter films and fluorescent films in a color pixel region of an inside surface of a panel having a black matrix formed thereon, wherein each of three color pigment filter layers and fluorescent material layers are formed in succession by a method including the steps of (1) coating pigment dispersed slurry to form a pigment filter layer, (2) coating photosensit
    Type: Application
    Filed: December 29, 2000
    Publication date: July 5, 2001
    Applicant: LG Electronics Inc.
    Inventors: Tae Yong Kim, Jae Hyoung Ju
  • Publication number: 20010002302
    Abstract: Disclosed are a phosphor pattern which comprises a calcination product of a phosphor pattern precursor containing
    Type: Application
    Filed: January 8, 2001
    Publication date: May 31, 2001
    Inventors: Naoki Kimura, Seiji Tai, Hiroyuki Tanaka, Takeshi Nojiri, Kazuya Satou, Yoshiyuki Horibe, Mariko Shimamura, Toranosuke Ashizawa, Eiji Fujita, Seikichi Tanno
  • Patent number: 6238829
    Abstract: Disclosed is a method of manufacturing a plasma addressed electro-optical display having a side surface electrode structure. In the display, a display cell is superimposed on a plasma cell. The display cell includes an intermediate substrate, an upper substrate having columns of signal electrodes, and an electro-optical material held therebetween. The plasma cell includes a lower substrate joined to the intermediate substrate, and a plurality of rows of discharge channels formed therebetween and composed of discharge electrodes and barrier ribs.
    Type: Grant
    Filed: May 19, 1998
    Date of Patent: May 29, 2001
    Assignee: Sony Corporation
    Inventor: Atsushi Seki
  • Patent number: 6214501
    Abstract: A method for coating phosphor particles with polymers improves chargeability for use of these particles in CRT screens. The method includes injecting the phosphor particles into a reactor with the use of hexane as the solvent and styrene as a monomer. The particles are agitated and kept hot in the reactor. AIBN is injected into the reactor as a first, second and third catalyst, at one hour intervals. After injecting the third catalyst, a co-catalyst dissolved in hexane is also injected into the reactor. The co-catalyst is cobalt naphthalate. The method then includes cooling, drying, shattering and filtering the particles.
    Type: Grant
    Filed: August 31, 1999
    Date of Patent: April 10, 2001
    Assignee: Orion Electric Co., Ltd.
    Inventor: Young Ho Park
  • Patent number: 6187487
    Abstract: A method for developing an electrostatic latent charge image formed on a photoreceptor 36 which is disposed on an interior surface of a faceplate panel 12 of a CRT 10 utilizes a developer 40 having a developing chamber 42 with a sidewall 50 closed by a bottom end 44 and a panel support 46 at the other end. An opening 48 is formed through the panel support 46 to provide access to and support for the faceplate panel 12. A panel grid 74 is disposed in proximity to said interior surface of said faceplate panel 12 and operated at a first potential to control the electric field from the latent charge image. A tank grid 56 is disposed within said developer 40 and spaced from the sidewall 50, the bottom 44 and the panel grid 74. A triboelectric gun 84 is disposed within the developer 40 for imparting a desired charge polarity to the screen structure material and for distributing the charged screen structure material onto the latent charge image.
    Type: Grant
    Filed: February 16, 2000
    Date of Patent: February 13, 2001
    Inventors: James Regis Matey, Eugene Samuel Poliniak, Brian Thomas Collins, Peter Michael Ritt
  • Patent number: 6126988
    Abstract: A method for forming a planar aluminum layer in a flat panel display structure. In one embodiment, the present invention creates a flat panel display structure having a raised black matrix defining wells within the matrix. The present embodiment then deposits a non-conformal layer of acrylic-containing aluminizing lacquer over a layer of phosphors residing within the wells of the black matrix. In so doing, the lacquer layer forms a substantially planar surface on top of the phosphors. The present invention then deposits a layer of catalyst material over the layer of lacquer so that the aluminizing lacquer can be burned off completely and cleanly at a relatively low temperature. The catalytic layer conforms to the planar surface of the lacquer layer. The present invention then deposits an aluminum layer over the catalytic layer. The aluminum layer, in turn, conforms to the planar surface of the catalytic layer. Finally, the present invention bakes off the non-conformal lacquer layer.
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: October 3, 2000
    Assignee: Candescent Technologies Corporation
    Inventor: Paul M. Drumm
  • Patent number: 6090509
    Abstract: Disclosed is a photoconductive solution which has excellent charge characteristics with easy control of charge amount and is completely volatilized after baking. The solution contains 0.01 to 10 wt. % of one of dialkyl(C.sub.n H.sub.2n+1.sup.-) aminobenzil methacrylate(DMABMA) of n below 5, dialkyl(C.sub.n H.sub.2n+1.sup.-) aminophenyl acryloamide(DMAPAA) of n below 5, dialkyl(C.sub.n H.sub.2n+1.sup.-) aminophenyl methacryloamide (DMAPMA) of n below 5, and the mixture of two kinds or more of them as ultraviolet-sensitive material of a donor and an acceptor. The solution is formed by dissolving said one ingredient together with 10 to 20 wt. % of at least one of polystyrene (PS), polymethyl methacrylate(PMMA), polyalphamethylstyrene(PAMS) and polystyrene-oxazoline copolymer(PS-OX) as polymeric binder, in 20 to 85 wt. % of toluene or xylene as solvent.
    Type: Grant
    Filed: July 28, 1998
    Date of Patent: July 18, 2000
    Assignee: Orion Electric Co., Ltd.
    Inventors: Ho Seok Shon, Younk Ho Park
  • Patent number: 6043596
    Abstract: A color CRT has a shadow mask formed from a bilayer composite of steel and invar. The thicknesses of steel and invar are chosen to take advantage of the lower thermal expansion coefficient of invar and the room temperature formability and higher modulus of elasticity of steel. Such composite masks exhibit reduced doming when compared to steel masks, and can be formed at room temperature.
    Type: Grant
    Filed: December 4, 1997
    Date of Patent: March 28, 2000
    Assignee: Philips Electronics North America Corporation
    Inventor: Venugopal Lakshmanan
  • Patent number: 6022651
    Abstract: The present invention provides with a black matrix, a phosphor screen, and a method of manufacturing thereof. For a method of manufacturing the black matrix formed on the inner surface of a panel of a color CRT, a photoresist is not used, but a wet electrophotographic method was employed, using graphite for a main component of the black matrix materials, and forming a phosphor screen by a dry electrophotographic method to improve the quality of a color cathode-ray-tube.
    Type: Grant
    Filed: January 29, 1996
    Date of Patent: February 8, 2000
    Assignee: Samsung Display Devices Co., Ltd.
    Inventor: Jong Ho Cho
  • Patent number: 6020093
    Abstract: The photosensitive compound of the present invention contains the following unit: ##STR1## and is particularly expressed by the following formula: ##STR2## Different photosensitive resin compositions can be prepared from this novel photosensitive resin compound, and the resulting photosensitive resin compositions do not raise the problem of environmental pollution, exhibit high resolution, possess a high level of sensitivity, and exhibit excellent adhesion with substrates, coating characteristics and storage stability.
    Type: Grant
    Filed: May 13, 1998
    Date of Patent: February 1, 2000
    Assignee: Toyo Gosei Kogyo, Ltd.
    Inventors: Toru Shibuya, Jian Rong Xie, Noriaki Tochizawa
  • Patent number: 6007952
    Abstract: The invention includes an apparatus 40, 140 for developing a latent charge image formed on a photoreceptor 36 disposed on an interior surface of a faceplate panel 12. The apparatus 40, 140 comprises a developer tank 42 having a sidewall 44 closed at one end by a bottom portion 46 and at the other end by a panel support 48 having an opening 50 therethrough to provide access to the faceplate panel 12. The back electrode 52 has a potential applied thereto to establish an electrostatic drift field between the back electrode and the photoreceptor 36, which is grounded. Triboelectrically-charged, dry-powdered, light emitting phosphor material, having a charge of the same polarity as the potential applied to the back electrode 52, is injected into the developer tank 42, between the back electrode 52 and the faceplate panel 12. The triboelectrically-charged phosphor material is directed toward the photoreceptor 36 on the faceplate panel 12 by the applied electrostatic drift field.
    Type: Grant
    Filed: August 7, 1998
    Date of Patent: December 28, 1999
    Assignee: Thomson Consumer Electronics, Inc.
    Inventors: David Paul Ciampa, Istvan Gorog, Peter Michael Ritt, Owen Hugh Roberts, Jr., Leonard Pratt Wilbur, Jr.
  • Patent number: 5976739
    Abstract: A method of developing a screen of a cathode ray tube includes the steps of establishing an uniform electrostatic charge on selected areas of an inner surface of a panel with a predetermined pattern, rotating a nozzle to a predetermined angle with respect to the inner surface of a panel, and moving the rotated nozzle backwards and forwards while spraying a dry-powdered and electrically charged screen structure material on the selected areas of the inner surface of the panel.
    Type: Grant
    Filed: January 30, 1998
    Date of Patent: November 2, 1999
    Assignee: Samsung Display Devices Co., Ltd.
    Inventors: Yang-hee Lee, Chae-bok Lim, Jong-ho Cho
  • Patent number: 5928821
    Abstract: The present invention relates to a method of electrophotographically manufacturing a phosphor screen 22 comprising a multiplicity of color-emitting screen elements arranged in color groups on an interior surface of a faceplate panel 12 of a color CRT 10. The multiplicity of screen elements is exposed to a source 35 of UV radiation to stimulate the screen elements to emission. The emission from the screen elements is utilized to determine, on a pixel-by-pixel basis, a first emission characteristic of each color group of screen elements. Then, a subsequent manufacturing step (58, 62) is performed that affects the screen elements, and the multiplicity of screen elements is re-exposed to the source of UV radiation to stimulate the screen elements to emission. The resultant emission is utilized to determine, on a pixel-by-pixel basis, a second emission characteristic from each color group of screen elements.
    Type: Grant
    Filed: December 22, 1995
    Date of Patent: July 27, 1999
    Assignee: Thomson Consumer Electronics, Inc.
    Inventors: Edward Richard Garrity, Jr., George Milton Ehemann, Jr.
  • Patent number: 5902708
    Abstract: A method of electrophotographically manufacturing a luminescent line screen 22 within a viewing area of a faceplate panel 12 includes providing a matrix 23 having a border 123 extending beyond the viewing area. A photoreceptor 36 overlies the matrix. The photoreceptor is electrostatically charged and a color selection electrode 25, having a multiplicity of openings therethrough, is mounted therein. The panel 12 is positioned on an exposure device having a multi-position visible light source. A least one series of light exposures utilizes both first and second order illumination to form selectively discharge the photoreceptor 36 in the viewing area and on the border 123 of the matrix. Then, triboelectrically charged, color-emitting phosphor is deposited onto the illuminated areas of the photoreceptor to form phosphor lines in the viewing area and phosphor traps over the matrix border.
    Type: Grant
    Filed: May 23, 1997
    Date of Patent: May 11, 1999
    Assignee: Thomson Consumer Electronics, Inc.
    Inventors: Istvan Gorog, James Regis Matey, Robert Edward Simms
  • Patent number: 5876884
    Abstract: An exposure process of a pattern on a transparent substrate of a plasma display panel is conducted on a flat principal surface of stage in which a depression is formed for accommodating an alignment optical source, wherein a movable shutter is provided on the stage so as to be movable in a plane substantially flush to the principal surface of the stage.
    Type: Grant
    Filed: October 2, 1997
    Date of Patent: March 2, 1999
    Assignee: Fujitsu Limited
    Inventors: Ryuji Maeda, Mitsugu Uemura, Masahiro Uraguchi
  • Patent number: 5863681
    Abstract: A shadow mask of two different metals which are cold rolled into adhesion with the shadow mask made from a first metal having a coefficient of thermal expansion on the order of glass and a second metal having a coefficient of thermal expansion substantially greater than glass with the first metal forming a framework for holding the second metal in position even though the temperature of the first and second metals is elevated.
    Type: Grant
    Filed: September 19, 1996
    Date of Patent: January 26, 1999
    Assignee: Wickeder Westgalenstahl GmbH
    Inventor: Klaus-Peter Helmetag
  • Patent number: 5844355
    Abstract: A color cathode-ray tube having a good quality of display screen in which a fluorescent dot pattern is formed to have good configuration and positional accuracies.
    Type: Grant
    Filed: July 19, 1996
    Date of Patent: December 1, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Ying-Fu Wang, Takashi Nishiguchi
  • Patent number: 5843601
    Abstract: Disclosed are a shadow mask, a cathode ray tube having the above shadow mask and a method for manufacturing a screen using the shadow mask. The shadow mask can concentrate electron beams and thereby largely increase luminance even with low electric power without deteriorating the purity of colors. The shadow mask has a first and a second thin metal plates. A first and a second voltages are applied to the first and the second thin metal plates and concentrate the electron beams passing through the first and the second electron beam passing holes respectively formed in the metal plates. The screen is manufactured with a controlled size of a developed area by controlling time using the shadow mask and an electrophotographical process.
    Type: Grant
    Filed: March 31, 1997
    Date of Patent: December 1, 1998
    Assignee: Orion Electric Co., Ltd.
    Inventor: Sang Youl Yoon
  • Patent number: 5840450
    Abstract: The black matrix of the faceplate panel is deposited by a wet-layer photoconductive manner. An organic conductive layer is initially deposited on the faceplate panel, on which an organic photoconductive material is formed to form an organic photoconductive layer. The photoconductive layer is charged to positive or negative potential and a selective area of the organic photoconductive layer is exposed to light radiated from an exposure device, such that the potential can be left on the unexposed area, where the black matrix will be deposited, of the organic photoconductive layer. Then, As novel steps, deposition of the conductive black matrix is achieved according to the following steps. First, a conductive black matrix material is charged having the opposite potential to that left on the unexposed area of the organic photoconductive layer.
    Type: Grant
    Filed: December 24, 1996
    Date of Patent: November 24, 1998
    Assignee: Samsung Display Devices Co., Ltd.
    Inventor: Jong-ho Cho
  • Patent number: 5827628
    Abstract: The method of electrophotographically manufacturing a screen on an interior surface of a faceplate for a CRT, according to the present invention comprises the steps of first-coating the faceplate with a volatilizable conductive layer, second-coating the conductive layer with the first photoconductive layer including a dye sensitive to ultraviolet rays, third-coating the ultraviolet-photoconductive layer with a second photoconductive layer including a dye sensitive to visible light, charging the whole area of the second photoconductive layer by exposing the whole surface of the second photoconductive layer to visible light while applying a suitable DC voltage between the conductive layer and the second photoconductive layer, and exposing selected areas of said first photoconductive layer to ultraviolet rays through a shadow mask to discharge the charge from the selected areas of the first photoconductive layer. Then, in developing a uniform density of the screen structure material is obtained.
    Type: Grant
    Filed: March 11, 1997
    Date of Patent: October 27, 1998
    Assignee: Orion Electric Co., Ltd.
    Inventors: Dong Ky Shin, Bok Soo Lee, Sang Youl Yoon
  • Patent number: 5750295
    Abstract: A light fixing layer is deposited on the panel during the screening process of a panel. The light fixing layer can be softened when it is subjected to light so as to allow the phosphor layers to be fixed on the panel. That is, the light fixing layer shows adhesive characteristics when subjected to light. Therefore, after developing all phosphor layers on the panel, when the light is radiated to the light fixing layer, the light fixing layer is softened, thereby fixing the phosphor layers.
    Type: Grant
    Filed: February 13, 1997
    Date of Patent: May 12, 1998
    Assignee: Samsung Display Devices Co., Ltd.
    Inventors: Choong-lak Kim, Jong-ho Cho