Screen Patents (Class 313/461)
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Publication number: 20040070328Abstract: A packed phosphor screen or panel consisting of at least one flat square or rectangular screen or panel, optionally packed apart in a wrapper foil, and a sealed package, wherein said package is layered in form of an asymmetrical barrier layer foil, said foil comprising an inner flexible thermoplastic polymer layer and an outer polymer layer in adhesive contact with an aluminum layer situated inbetween said inner flexible thermoplastic polymer layer and said outer polymer layer, wherein said foil is characterized by adhesive forces, between said outer polymer layer and said aluminum layer, of more than 2.5 N/mm2 following DIN 53 357, by a permeation to water vapor of less than 0.01 g per sq.m. in an environment having a temperature of 23° C. and a relative humidity of 75% RV for 24 hours following DIN 53 122, and by a permeation of less than 0.01 cm3 per sq.m. per 24 hours and per bar for each of oxygen, carbon dioxide and nitrogen following DIN 53 380 (ISO 2556, ASTM D 1434).Type: ApplicationFiled: July 11, 2003Publication date: April 15, 2004Inventors: Rudy Van den Bergh, Heinz Backhaus, Ludo Neyens
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Publication number: 20040051437Abstract: Disclosed is a cathode ray tube, and more particularly, a cost-effective cathode ray tube effective for minimizing deterioration of color purity and obtaining a sufficient margin for sufficient margin for a beam strike neck (BSN) phenomenon by moving a ½ center (deflection center) closer to a panel without changing the curvature of a funnel or the thickness of a glass inside the funnel.Type: ApplicationFiled: March 20, 2003Publication date: March 18, 2004Inventor: Hyuk Dong Kim
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Patent number: 6707245Abstract: A glass panel for a cathode ray tube comprises a substantially rectangular face portion on which images are displayed and a skirt portion continuous to the face portion through a blend R portion. An effective screen size of the face portion in a diagonal direction is 500 mm or more, an average radius of curvature of an outer surface of the face portion is 10000 mm or more in all radial directions from a face center portion, and a difference in height between the face center portion and an edge portion of the effective screen in the diagonal direction on an inner surface of the face portion is in a range from 9 mm to 17 mm.Type: GrantFiled: July 19, 2002Date of Patent: March 16, 2004Assignee: Nippon Electric Glass Co., Ltd.Inventors: Nobutaka Daiku, Hajime Makio, Yoshiharu Miwa
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Patent number: 6703781Abstract: Light scattering particles are added to the ink used for printing the cascading layer. The particles and cascading material are then printed in the same layer. Light entering the cascading layer is scattered, re-entering the cascading material thereby increasing the effectiveness of the cascading material and enabling one to use less material. Because less cascading material is used, the cost of the EL lamp is reduced and cascading efficiency is increased. The light scattering particles and the cascading material are in an overprint or are in the phosphor layer.Type: GrantFiled: May 21, 2002Date of Patent: March 9, 2004Assignee: Durel CorporationInventor: Charles I. Zovko
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Patent number: 6703778Abstract: In a display device (70, 70A, 80-80G, 90-90F) having a display window (73, 81, 93), a magnetic loss layer or layer (75, 75A, 88-88C, 97-97C) is formed on at least a part of a principal surface of the display window. The magnetic loss layer may be a granular magnetic thin layer which is, for example, made of a magnetic substance of a magnetic composition comprising M, X and Y, where M is a metallic magnetic material consisting of Fe, Co, and/or Ni, X being element or elements other than M and Y, and Y being F, N, and/or O. The magnetic loss layer may be formed in any one selected from mat, lattice, stripe, and speck fashions. The magnetic loss layer may be formed in a mesh fashion.Type: GrantFiled: April 4, 2001Date of Patent: March 9, 2004Assignee: NEC Tokin CorporationInventors: Shinya Watanabe, Koji Kamei, Hiroshi Ono, Shigeyoshi Yoshida, Michio Nemoto
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Publication number: 20040036405Abstract: A screen for display devices and manufacturing method thereof capable of enhancing optical characteristics as well as increasing customers' satisfaction through functional substances. The screen for display devices has a front panel formed by coating on the upper surface of a screen substrate a substance mixed with organic or inorganic functional fine particles. The organic or inorganic functional fine particles contain at least one or more functional substances for anti-bacteria, aroma, and deodorization. Further, the fine particles are encapsulated in predetermined sizes so as not to obstruct optical characteristics, and the capsules may be formed in circle-shaped, ellipse-shaped, or amorphous class 1-shaped grain sizes. In non-glare treatments, a convexoconcave-shaped front panel is formed to enhance optical characteristics by mixing a non-glare treatment substance and a fine particle-mixed substance.Type: ApplicationFiled: May 6, 2003Publication date: February 26, 2004Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventor: Gyu-hwan Hwang
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Publication number: 20040032199Abstract: A novel CRT and method of making the CRT are disclosed. The CRT comprises an internal neutral density filter that lies between the phosphor deposits and the interior surface of the faceplate panel. The filter enhances the contrast of the CRT without compromising center to edge brightness ratio of the CRT. The filter comprises very fine particles, wherein the particles are black, gray, or a mixture of black and gray. The filter reduces the absorption of the faceplate by 25 to 75%. The invention is particularly useful for substantially flat CRTs. The method of producing the novel CRT comprises the steps of preparing a suspension of well-dispersed light-absorbing, carbon-containing particles which are 0.05 to 2 microns in aqueous media and applying the suspension onto the interior surface of the faceplate panel prior to applying at least one phosphor deposit. The suspension may also include suitable organic and inorganic binders and dispersing and wetting agents.Type: ApplicationFiled: August 19, 2002Publication date: February 19, 2004Inventor: Himanshu Mukundray Patel
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Patent number: 6693374Abstract: Flat CRT panel including a substantially flat outside surface, and an inside surface with a certain radius of curvature, wherein the panel is formed such that (Ts/Tm)*CFT*Rz falls on a range of 28-36, where CFT denotes a center thickness, Ts denotes a diagonal effective screen edge thickness Ts, Tm denotes a maximum thickness at an interface of the skirt and the effective screen, and Rz denotes an inside radius of curvature, i.e., a value obtained by dividing a diagonal effective screen sectional radius of curvature Rd by a representative value {Rd/(1.767*a diagonal length of the effective screen)}, thereby minimizing breakage during heat treatment and reducing a production cost.Type: GrantFiled: June 20, 2002Date of Patent: February 17, 2004Assignee: LG Philips Displays Korea Co., Ltd.Inventors: Gi Hoon Tho, Sung Han Jung
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Patent number: 6690106Abstract: A color cathode ray tube is constituted of a glass bulb which includes a panel portion having a faceplate portion with a phosphor screen on an inner surface thereof, a neck portion in which an electron gun is mounted, and a funnel portion which connects the panel portion and the neck portion. Assuming a thickness of a screen effective area of the faceplate portion along the tube axis direction as tc at a central section thereof, as tx at a peripheral section thereof along the major axis direction, and as td at a peripheral section thereof along the diagonal direction, the cathode ray tube has the relationship tc>td>tx.Type: GrantFiled: October 26, 2001Date of Patent: February 10, 2004Assignee: Hitachi, Ltd.Inventors: Haruhiko Yoshida, Nobuhiko Hosotani, Mitsuru Watanabe, Hiroshi Itou
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Patent number: 6683409Abstract: A structured lighting material, an illuminator, and the method to generate incoherent luminescence wherein luminescent intensity increases superlinearly when excitation energy applied thereto through electron beam, electric charge, electric field or the like exceeds a threshold. In the present invention, the structured lighting material is easily made to have a minute uneven surface. This invention enables high-efficient lighting devices, sensors and memories owing to the superlinearity.Type: GrantFiled: December 27, 2001Date of Patent: January 27, 2004Assignee: Mitsubishi Chemical CorporationInventors: Masayoshi Mikami, Hajime Yamamoto, Shinichiro Nakamura
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Patent number: 6683404Abstract: A panel glass wherein a surface treating film is formed on a substrate glass so that the surface treating film has a transmittance distribution reverse to the transmittance distribution of the substrate glass, thus providing a uniform-brightness image with a flattened panel glass.Type: GrantFiled: September 16, 2002Date of Patent: January 27, 2004Assignee: Asahi Glass Company, LimitedInventors: Noritoshi Horie, Tsunehiko Sugawara, Takuji Oyama
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Patent number: 6683403Abstract: A panel for a flat screen type CRT includes an internal curvature portion wherein a screen effective surface is formed, and a skirt portion extended rearwardly from an edge of the internal curvature portion. Where Rs is the radius of curvature at an inner side of a corner of a seal edge portion in the skirt portion and Rx, Ry, and Rd are respectively the radii of blend curvature of a long-side portion, a short-side portion and a corner portion in a part where the internal curvature portion and skirt portion meet, the relations 0.4<Rd/Rs<0.6, 1≦Rx/Rd≦4, and 1≦Ry/Rd≦2 are satisfied, whereby the size of the screen effective surface area can be increased compared to that of a CRT of the same size.Type: GrantFiled: October 23, 2001Date of Patent: January 27, 2004Assignee: LG Electronics, Inc.Inventor: Jae Seung Baek
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Patent number: 6667570Abstract: Disclosed is a structure of panel in flat-type CRT (Cathode Ray Tube), which is capable of securing a stable vacuum intensity by applying sufficient tension to a face part of a panel using a straight safety band, and of effectively reducing an advance of a crack and scattering of fragments due to an external shock, by optimizing the relationship among an MMH (Mold Match Height), a CFT (Center Face Thickness) and an OAH (Overall Height), which are design factors. The structure of panel in flat-type CRT (Cathode Ray Tube) includes a face part having a flat outer surface and an inner surface of a fixed curvature, and a skirt part extending from an edge of the face part to a rear portion.Type: GrantFiled: September 12, 2001Date of Patent: December 23, 2003Assignee: LG Electronics Inc.Inventors: Byoung-Chul Kim, Do-Hoon Kim
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Publication number: 20030230966Abstract: The phosphor screen is capable of minimizing the spread of lights in the phosphor screen, so as to restrict fading images and lowering contrast. The phosphor screen comprises a lot of minute phosphor sections. The phosphor sections are respectively enclosed by barriers, which absorb visible lights and have electric conductance, and whose height is equal to or higher than a half of thickness of the phosphor sections. The barriers are made of a material including the particles of an inorganic compound, whose average diameter is 1-8 &mgr;m, and carbon particles, whose average diameter is less than 1 &mgr;m.Type: ApplicationFiled: May 5, 2003Publication date: December 18, 2003Inventor: Lyuji Ozawa
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Publication number: 20030230965Abstract: The present invention proposes a Braun Tube for projectors having an illuminant layer provided on a phosphor screen, the illuminant layer including Zinc Silver Aluminum Oxide (ZnS:Ag, Al) as a blue color illuminant; Yttrium Terbium Silicate (Y2SiO5:Tb) as a green color illuminant; and Yttrium Europium Oxide (Y2O3:Eu) as a red color illuminant, all illuminants having particle size of 5 to 7 &mgr;m. As a result, it is possible to realize a Braun Tube for projectors, in which an extended life cycle is achieved by constraining the degradation of the illuminant, constraining the browning phenomenon as well as improving the spot size of the electron beam thereof.Type: ApplicationFiled: February 3, 2003Publication date: December 18, 2003Inventors: Takahiro Igarashi, Tsuneo Kusunoki, Katsutoshi Ohno
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Publication number: 20030222567Abstract: A screen composite provided on a face plate of a flat panel display device, said screen composite containing an aluminum layer and a metal layer formed on said aluminum layer for substantially reducing a halation phenomenon.Type: ApplicationFiled: May 29, 2003Publication date: December 4, 2003Inventor: Sang-Chul Ryu
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Publication number: 20030214213Abstract: 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: ApplicationFiled: June 12, 2003Publication date: November 20, 2003Inventors: Seiichi Tsunoda, Masanao Uesugi
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Patent number: 6639345Abstract: To realize a high-quality flat-face type of color cathode ray tube by combining a tint panel with a pressed mask, the outer surface of the panel of the color cathode ray tube is made nearly flat and the inner surface of the panel is curved in a concave shape, and the long-length direction pitch of slots formed in an aperture region 2 of a pressed mask 1 to be disposed close to the inner surface and the connection-direction width of each of bridges which connect the slots are made different between a central portion (A) and a peripheral portion (B) in the apertured region 2 of the pressed mask 1, whereby the ratio of bridges per unit area is made larger in the central portion (A) than in the peripheral portion (B) or the opening rate of slots per unit area is made larger in the peripheral portion (B) than in the central portion (A).Type: GrantFiled: March 7, 2001Date of Patent: October 28, 2003Assignee: Hitachi, Ltd.Inventors: Yuichi Inoue, Katsuyuki Kawamura
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Patent number: 6639346Abstract: A panel defining a front exterior of a cathode ray tube has an inner surface overlaid with a phosphor screen, and an outer surface overlaid with a tinted coating layer, wherein the tinted coating layer varies light transmission at the center and the periphery of the panel by being dark at the center and gradating brighter toward the periphery thereby preventing a difference in brightness of the panel between the center and the periphery thereof due to incremental growth in the volume of a black matrix and in the thickness of the panel toward the periphery.Type: GrantFiled: May 1, 2001Date of Patent: October 28, 2003Assignee: Samsung Display Devices Co., Ltd.Inventors: Sung-Ryong Bae, Jong-Hwan Park, Yun-Hee Kim
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Patent number: 6639347Abstract: In a color cathode ray tube, a rectangular panel has a slightly convex outer face with a large radius of outward curvature so as to be almost flat and a concave inner face which satisfies the conditions 0.98<Rh/Rd<1.02, 0.95<Rv/Rd<1.04, 0.98<Rt/Rh<1.02, and 0.98<Rs/Rv<1.05, where Rd is the radius of diagonal curvature along a screen effective surface area, Rt is the radius of a long side peripheral curvature, Rs is the radius of a short side peripheral curvature, Rh is the radius of curvature along the x-axis passing through a center of the screen effective surface area and parallel to the long side, and Rv is the radius of curvature along the y-axis passing through the center of the screen effective surface area and parallel to the short side. Accordingly, distortion of a picture can be minimized by designing the internal curvature of the panel as an optimum shape, and a high picture quality can be obtained.Type: GrantFiled: October 4, 2001Date of Patent: October 28, 2003Assignee: LG Electronics Inc.Inventor: Chang Gi Ko
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Patent number: 6630778Abstract: A color cathode ray tube includes a transparent panel, a funnel joined airtightly to a circumference portion of a sidewall of the panel, a light absorption layer (black layer) and an optical filter layer both disposed on an interior surface of the transparent panel, and a phosphor layer formed thereon. A length from an edge of the panel joined to the funnel to a circumference edge of the light absorption layer formed on an interior surface of the sidewall of the panel is longer than or equal with that from the edge of the panel to a circumference edge of the optical filter layer formed similarly on an interior surface of the sidewall of the panel. The color cathode ray tube can be manufactured by making a length from an edge of the panel to a scraping edge of the light absorption layer in the trimming step of the light absorption layer longer than or equal with that from the edge of the panel to a scraping edge of the filter layer in the trimming step of the filter layer.Type: GrantFiled: July 17, 2001Date of Patent: October 7, 2003Assignee: Kabushiki Kaisha ToshibaInventors: Koji Washiyama, Keisuke Iida, Masaaki Inamura
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Publication number: 20030184209Abstract: A large screen emissive display operating at atmospheric pressure includes pixels, the red, green, and blue subpixels of which are excited by UV laser light scanned onto the subpixels by a pixel activation mechanism. The pixel activation mechanism includes three grating light valves (GLVs) that are controlled by a processor in response to a demanded image to modulate the UV light as appropriate to produce the demanded image. A refraction layer can be associated with a display such that respective beams are refracted onto red, green, and blue subpixels of the display.Type: ApplicationFiled: March 29, 2002Publication date: October 2, 2003Applicants: SONY CORPORATION, SONY ELECTRONICS INC.Inventors: Ben Russ, Frederick J. Zustak
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Publication number: 20030184210Abstract: A variable pitch color selection mask for configured for an image display apparatus. A substrate having phosphor-based red, green, and blue subpixels is covered by a refraction layer. The color selection mask layer is printed onto the refraction layer, with the mask layer being configured to shield the blue and green subpixels from a first beam, shield the red and green subpixels from a second beam, and shield the red and blue subpixels from a third beam.Type: ApplicationFiled: April 1, 2002Publication date: October 2, 2003Applicants: SONY CORPORATION, SONY ELECTRONICS INC.Inventor: Ben Russ
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Patent number: 6628062Abstract: Color CRT panel including an outside surface substantially flat, and an inside surface with a desired curvature, wherein an inside surface curvature structure of the panel consists of arc curvatures having a long axis direction radius Rx of curvature and a short axis direction radius Ry of curvature different from each other, thereby improving a structural strength of the shadow mask to prevent deterioration of color reproducibility of an image.Type: GrantFiled: April 14, 2000Date of Patent: September 30, 2003Assignee: LG Electronics, Inc.Inventors: Keon Soo Nah, Hyoung Guen Park
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Patent number: 6621206Abstract: A panel is provided with a substantially rectangular effective portion that has a substantially flat outer surface, and a phosphor screen is formed on the inner surface of the effective portion. A shadow mask that is opposed to the phosphor screen includes a substantially rectangular mask body formed having a large number of electron beam holes and a mask frame supporting the peripheral edge portion of the mask body. The interval between the electron beam holes in the direction of the major axis of the mask body increases from the center of the mask body toward the major axis end so that the rate of change of the interval has a maximum value in the region between the center of the mask body and the major axis end.Type: GrantFiled: July 3, 2001Date of Patent: September 16, 2003Assignee: Kabushiki Kaisha ToshibaInventors: Norio Shimizu, Masatsugu Inoue
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Publication number: 20030164669Abstract: The present invention provides a formed type flat panel made of tinted glass, which is capable of satisfying the UL standard for implosion resistance thereof. The formed type flat panel of the present invention includes a substantially rectangular faceplate having an substantially flat external surface and a curved inner surface; a skirt portion extending backward from a periphery of the faceplate; a corner portion joining the faceplate and the skirt portion. The faceplate has a specially tailored thickness distribution so at to accomplish aforementioned capability.Type: ApplicationFiled: February 28, 2003Publication date: September 4, 2003Inventors: Suck Young Kim, Kyoung Mun Choo
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Patent number: 6614161Abstract: A resonant microcavity display (20) having microcavity with a substrate (25), a phosphor active region (50) and front and rear reflectors (30 and 60). The front and rear reflectors may be spaced to create either a standing or treaveling eledtromagnetic wave to enhance the efificenty of the light transmission.Type: GrantFiled: July 31, 2000Date of Patent: September 2, 2003Assignee: University of Georgia Research Foundation, Inc.Inventors: Stuart M. Jacobsen, Steven M. Jaffe, Hergen Eilers, Michieal L. Jones
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Patent number: 6614162Abstract: A cathode ray tube with a panel that has a thickness of the central portion of an effective area of a screen surface that is TC, a thickness of a vertical edge that is TV, a thickness of a horizontal edge portion that is TH, and a thickness of an edge in a diagonal direction that is TD. The respective values of TC, TV, TH and TD satisfy the expression (TH−TC)+(TV−TC)+(TD−TC)<TC/3, and the radius of curvature in the diagonal direction of the outer surface of the effective area is 1450 mm or more. Thus, by limiting the difference in thickness of the central portion and the peripheral portion of the effective screen area of the panel and the curvature radius of the inner and outer surfaces of the effective screen, the weight of the panel is reduced and an increase of an incident angle caused by flatness of the screen panel is prevented so that a convergence feature of an electron beam is improved.Type: GrantFiled: February 27, 2001Date of Patent: September 2, 2003Assignee: Samsung SDI Co., Ltd.Inventors: Wan Kim, Do-hun Pyun, Tae-il Yoon, Jeong-in Yoo
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Patent number: 6614160Abstract: A fluorescent screen for a color CRT including: a panel having a predetermined light transmittance: a black matrix formed on the inner surface of the panel for absorbing an external light; red, green and blue fluorescent material layers positioned on the upper surface of the panel where the black matrix is formed, for emitting light corresponding to each color; a red filter layer positioned between the red fluorescent material layer and the panel, for absorbing light having wave length except for the main light emitting region of the red fluorescent material layer; and a blue filter layer positioned between the red fluorescent material layer and the panel and the green fluorescent material layer and the panel, for absorbing light having a wave length except for the main light emitting region of the green fluorescent material layer and the blue fluorescent material layer.Type: GrantFiled: March 3, 2000Date of Patent: September 2, 2003Assignee: LG Electronics Inc.Inventor: Koo Hwa Lee
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Patent number: 6611090Abstract: An anti-reflection film having superior anti-reflection properties and which is suited for practical application is to be manufactured easily and simply with high productivity and a reduced manufacturing cost. To this end, there are sequentially formed by layering, an adhesive layer 4, a first optical thin film 5, containing one or more of titanium nitride, hafnium nitride and zirconium nitride, and a second optical thin film 6 having a refractive index of 1.35 to 1.7. The adhesive layer 4 is represented by the chemical formula of SiOx, where x<2. If the first optical thin film 5 mainly contains titanium nitride, the first optical thin film 5 preferably is electrically conductive. The second optical thin film 6 is preferably formed of SiO2. A cathode ray tube may be provided by arranging the resin substrate 3, carrying the respective layers, on a face plate side of the display portion, with the remaining configuration of the anti-reflection film being the same as above.Type: GrantFiled: July 26, 1999Date of Patent: August 26, 2003Assignee: Sony CorporationInventors: Hiroichi Ishikawa, Kazuo Watanabe
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Patent number: 6608454Abstract: An inner surface of the panel is formed to satisfy at least one of the following relationships: ZPH/LPH≦0.0050, and ZPV/LPV≦0.050 where LPH represents a distance from a center of the effective section to a long axis end of the effective section. LPV represents a distance from the center to a short axis end of the effective section, ZPH represents a fall of the effective section at the long axis end along the tube axis, and ZPV presents a fall of the effective section at the short axis end along the axis of the tube axis. At least one of each long side and each short side of a mask surface is curved such that a central portion thereof projects outwardly, and satisfies at least corresponding one of the following relationships: YML/LML≦0.015, and XMS/LMS≦0.Type: GrantFiled: December 17, 2001Date of Patent: August 19, 2003Assignee: Kabushiki Kaisha ToshibaInventors: Norio Shimizu, Takuya Mashimo, Masatsugu Inoue
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Patent number: 6608434Abstract: In a color picture tube, a phosphor screen is formed on an inner face of a face panel, which is formed of a plurality of phosphor lines in the form of stripes, and a color selecting electrode opposed to the phosphor screen is provided. The color selecting electrode has a plurality of apertures and bridges each separating the adjacent apertures from each other in a direction along the phosphor lines. In the vicinities of shadows of the bridges formed as a result of projection by electron beams, each of light emitting regions in which the phosphor lines emit light by irradiation with the electron beams has a part in which a wide portion of a greater width than a basic width Wb of the light emitting region is provided. Darkening of the phosphor screen can be compensated, which is caused by the shadows of the bridges shading the phosphor lines. Thus, a decrease in the luminance of the phosphor screen and picture noise that are caused by the shadows of the bridges can be suppressed.Type: GrantFiled: March 4, 2002Date of Patent: August 19, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hideaki Etou, Atsushi Kato
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Publication number: 20030151348Abstract: An epoxy-free method for manufacturing a faceplate for a laser-CRT that produces a uniform bonding interface between the laser structure and the transparent substrate during faceplate fabrication such that efficient uniform optical output, thermal expansion coefficient matching, and better heat transfer can be achieved. The faceplate comprises a laser structure including an active gain layer and first and second mirrors on opposite sides of the active gain layer, and a transparent substrate thermal expansion matched to the laser structure and bonded to the laser structure. The laser structure and transparent substrate are bonded using diffusion bonding or sol-gel bonding to create the highly uniform bonding interface.Type: ApplicationFiled: February 11, 2003Publication date: August 14, 2003Inventor: Michael D. Tiberi
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Patent number: 6597098Abstract: A cathode ray tube includes a panel and a reinforcing band for implosion-protection that is located around a side wall of the panel. The reinforcing band is formed by folding over one side in a width direction of a belt-like metal plate (6) so as to have a partially twofold structure and by joining both end portions of the belt-like metal plate (6) so as to be in the shape of a closed loop extending along the side wall of the panel. One end portion and the other end portion of the both end portions are joined together so as to achieve a threefold structure in at least one part. This can achieve a strong reinforcing band at a low cost without using a special member.Type: GrantFiled: December 27, 2000Date of Patent: July 22, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventor: Koichi Nishikata
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Patent number: 6597099Abstract: With respect to a highly flat glass bulb for cathode ray tube having an effective screen diameter along a diagonal axis of a glass panel 10 of more than or equal to 500 mm, and an average radius of curvature of an outer surface of a face portion of more than or equal to 10,000 mm, a ratio between a length h of a skirt portion 13 of the glass panel and a distance H in the tube axis direction from an edge surface portion where a funnel is sealed with the glass panel to a reference line is defined so as to fall within a predetermined range in relation to a deflection angle &thgr; of the funnel representing substantial degree of divergence in the tube axis direction of the funnel, thereby achieving reduction of weight of the glass bulb while maintaining a certain mechanical strength, as well as suppressing breakage during frit seal heating process.Type: GrantFiled: January 9, 2001Date of Patent: July 22, 2003Assignee: Nippon Electric Glass Co., Ltd.Inventor: Masaya Kyono
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Patent number: 6597097Abstract: There is provided a cathode-ray tube including an envelope having a neck, a funnel and a panel fused to the funnel by using frit glass, the outside of the panel being near flat, the inside of the panel having a predetermined curvature, in which 1.7≦T2/T1≦2.3 when T1 is the thickness of the center of the panel and T2 is the thickness of the diagonal corner of the panel, and a panel inside tensile stress at the fused portion of the panel and funnel is less than −1.3876x+128.24 (Kgf/cm2) when the size of the effective picture area of the cathode-ray tube is x(unit: cm). The panel inside tensile stress at the fused portion of the panel and funnel is maintained below a predetermined value to mitigate breakage inside the furnaces that occurs when the cathode-ray tube having the panel whose outside is near flat and whose inside has a predetermined curvature is reproduced, thereby improving the salvage rate.Type: GrantFiled: August 15, 2001Date of Patent: July 22, 2003Assignee: LG Electronics Inc.Inventor: Seong-Han Jeong
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Patent number: 6597102Abstract: A glass bulb for a cathode ray tube comprising a panel portion having a substantially rectangular face portion and a funnel portion having a neck portion, wherein when the glass bulb is used for a cathode ray tube, the glass bulb at least regionally suffers from a tensile stress resulting from the atmospheric pressure on the outer surface of the glass bulb having a vacuum inside, at least part of the face portion of the panel portion where the tensile stress over the face portion has a maximum value &sgr;VP has a compressive stress layer formed by chemical tempering on the outer surface, and the &sgr;VP, the magnitude of the compressive stress on the compressive stress layer &sgr;C MPa, and the thickness of the compressive stress layer tC &mgr;m satisfy the following relationship: 120/tC≧(1−|&sgr;VP/&sgr;C|)>30/tC provided that &sgr;VP≧20 MPa.Type: GrantFiled: April 11, 2002Date of Patent: July 22, 2003Assignee: Asahi Glass Company, LimitedInventors: Tsunehiko Sugawara, Mikio Miyamoto, Toshihiro Ohashi, Takahiro Murakami
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Patent number: 6589649Abstract: A biaxially oriented polyester film, an adhesive film, or a colored hard coat film for application to CRT or liquid crystal display devices to improve contrast and color purity, characterized in that the film contains a coloring matter; (1) a wavelength (X) of the maximum absorption peak of light in wavelengths of 540 to 630 nm is in the range of 560 to 610 nm; (2) a half band width of the maximum absorption peak of the light is not more than 80 nm; a value (Tx/T540), obtained by dividing a light transmittance (Tx) at the wavelength (X) by a light transmittance (T540) at a wavelength of 540 nm, is less than 0.80; a value (T620/T540), obtained by dividing a light transmittance (T620) at the wavelength of 620 nm by a light transmittance (T540) at a wavelength of 540 nm, is in the range of 0.5 to 1.5; and a value (T450/T540), obtained by dividing a light transmittance (T450) at the wavelength of 450 nm by a light transmittance (T540) at a wavelength of 540 nm, is in the range of 0.5 to 1.5.Type: GrantFiled: July 26, 2002Date of Patent: July 8, 2003Assignee: Teijin LimitedInventors: Taro Oya, Masayuki Fukuda, Makoto Handa
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Patent number: 6590330Abstract: A display device comprises a color filter pattern between a phosphor pattern and a display window. For blue, the thickness (t2) of this color filter pattern is more than 2.5 micrometer, preferably 5-7 micrometer, and/or for red said thickness is 0.25-1.5 micrometer. The red and/or blue color filter patterns are provided by means of a non-linear photoresist. This enables an improved contrast (LCP) to be achieved.Type: GrantFiled: December 21, 1998Date of Patent: July 8, 2003Assignee: Koninklijke Philips Electronics N.V.Inventors: Arie R. Van Doorn, Godefridus P. Van Melis
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Patent number: 6590327Abstract: A color cathode ray tube comprises a panel which outside surface is flat and inside surface has curvature, and a pressed shadow mask having a curved surface opposed to the panel inside surface. The curved surface of the shadow mask is such that the radius of curvature decreases approximately linearly as the position moves from the center to the periphery. Radii of curvature on the major axis, minor axis, and diagonal axis at positions having the same distance from the shadow mask center do not have large differences. This configuration can increase the mechanical strength of the shadow mask.Type: GrantFiled: May 1, 2001Date of Patent: July 8, 2003Assignee: Hitachi Ltd.Inventors: Takeharu Furusawa, Nobuhiko Hosotani, Mutsumi Maehara
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Patent number: 6590325Abstract: A structure for preventing howling of a shadow mask in a cathode ray tube. The tube includes a panel having a fluorescent material screen on an inside surface, a shadow mask for selecting a color of electron beams emitted from an electron gun, and frames each fastened to a long side of the shadow mask to support the shadow mask on the panel through connecting members for applying a tension to the shadow mask in a vertical direction. The shadow mask includes an effective surface having holes for selecting the color of the electron beams, non-effective surfaces which form no screen, and howling prevention members bent along short side edges of the non-effective surfaces in a horizontal front-to-back direction. This provides a high quality picture because howling is improved even at edge portions of the shadow mask owing to the enhanced moment of inertia and higher natural frequency of the edge portions of the shadow mask.Type: GrantFiled: June 12, 2000Date of Patent: July 8, 2003Assignee: LG Electronics, Inc.Inventor: Yoon San Park
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Publication number: 20030122473Abstract: Disclosed is a structure of a projection television comprising a screen, a front panel, a supporting part upon which an image forming device is mounted, an one-piece cabinet having an upper opening for the screen and a lower opening for the front panel, and upper and lower back covers provided at the rear of the one-piece cabinet.Type: ApplicationFiled: September 27, 2002Publication date: July 3, 2003Applicant: LG Electronics Inc.Inventor: Dong Seon Jeong
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Patent number: 6586871Abstract: A panel glass having a surface treating film formed on a substrate glass so that an overall transmittance distribution within an effective picture plane satisfies a specific mathematical expression, whereby, even with a flattened panel glass, a uniform-brightness image can be observed with a good contrast, and occurrence of a double image is suppressed.Type: GrantFiled: July 25, 2001Date of Patent: July 1, 2003Assignee: Asahi Glass Company, LimitedInventors: Noritoshi Horie, Tsunehiko Sugawara, Takuji Oyama
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Patent number: 6573661Abstract: An image display device, including: a luminous display having a light emitting face for providing a luminous image; and a reflective image in a screen pattern located on the light emitting face, whereby when the luminous display is emitting light, the luminous image dominates, and when the luminous display is not emitting light the reflective image dominates.Type: GrantFiled: June 12, 2001Date of Patent: June 3, 2003Assignee: Eastman Kodak CompanyInventors: William Y. Fowlkes, Lee W. Tutt
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Patent number: 6573649Abstract: A color picture tube includes a panel of which substantially rectangular effective area has a flat external surface and a curved internal surface, and on the internal surface of the effective area thereof a phosphor screen is formed. The internal surface of the effective area of the panel, when an average radius of curvature in major axis direction is RH, an average radius of curvature in minor axis direction is RV, an average radius of curvature in long side direction is RL and an average radius of curvature in short side direction is RS, is formed in a curved face satisfying RH>RV and RS≧RV, or RH>RV and RS≧RV and RL≧RH. In this color picture tube, flatness of the effective area of the panel and visibility are improved.Type: GrantFiled: March 19, 2001Date of Patent: June 3, 2003Assignee: Kabushiki Kaisha ToshibaInventors: Shinichiro Nakagawa, Norio Shimizu, Takashi Murai, Masatsugu Inoue
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Patent number: 6570316Abstract: The invention relates to a television tube having a screen and a flare. In accordance with the invention at least the front surface of the screen has the shape of a geometric rectangle or at least approximately said shape. The flare has a corresponding contour in the area where they are joined.Type: GrantFiled: August 18, 2000Date of Patent: May 27, 2003Assignee: Schott GlasInventor: Stefan Hergott
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Patent number: 6566802Abstract: A structure of a panel for a flat type cathode ray tube having an outer panel surface approximating a completely flat surface and an inner panel surface with a radius of curvature is provided. A difference between a panel thickness at a central part of the panel and a panel thickness at each of the diagonal corner parts of the panel satisfies a condition of 1.7≦T2/T1≦2.2, where T1 represents the panel thickness at the central panel part and T2 represents the panel thickness at the diagonal corner panel parts. Further, compressive stresses exhibited at at least one part of the outer panel surface satisfy a condition of 6.0 MPa≦|&sgr;|≦15.0 MPa, where &sgr; represents the compressive stresses exhibited at at least one part of the panel. This panel structure can maximize an effect of preventing an in-furnace thermal breakage of the panel.Type: GrantFiled: November 6, 2000Date of Patent: May 20, 2003Assignee: LG Electronics Inc.Inventor: Seong Han Jeong
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Patent number: 6559589Abstract: A flat-type cathode ray tube which improves the brightness and color purity of a picture by improving a curvature of an inner surface of a panel of the cathode ray tube thereby preventing the mislanding of the electron beam, doming, howling, errors due to the magnetic field of the earth magnetism, and the like. The flat-type cathode ray tube includes a panel for displaying a picture, the outer surface of the panel is planar with an inner surface having inner surface curvatures, respectively, along the vertical axis direction and the horizontal axis direction.Type: GrantFiled: April 11, 2001Date of Patent: May 6, 2003Assignee: LG Electronics Inc.Inventor: Thae-Seok Yoon
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Patent number: 6560124Abstract: In a display device, attached to a plate-type chassis (2) is a PDP (1) having a display screen on which videos are displayed and a circuit board (9) on which a circuit driving the PDP (1) is arranged. The circuit board (9) is shielded with respect to the PDP (1) thanks to the chassis (2), and thus does not receive any unwanted radiation noise radiated by the PDP (1). The display device further includes a back cover (6) and a cabinet (7) each having conductivity. The back cover (6) and the cabinet (7) house therein the PDP (1) and the circuit board (9) attached to the chassis (2). The back cover (6) and the cabinet (7) are both electrically insulated from the chassis (2). Therefore, any unwanted radiation noise from the PDP (1) and the circuit on the circuit board (9) is stopped leaking to the outside.Type: GrantFiled: April 30, 2001Date of Patent: May 6, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Shoichi Irie, Kazunobu Kojima
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Patent number: 6555951Abstract: Color CRT having a rectangular panel with an outer surface with a radius of curvature greater than 30,000 mm, an inner surface with a fixed curvature, and a skirt extended substantially perpendicular to the inner and outer surfaces, and a funnel connected to a skirt seal edge part of the panel, to meet conditions of 0.18≦OAH/(USD/2)≦0.Type: GrantFiled: November 14, 2001Date of Patent: April 29, 2003Assignee: LG Electronics Inc.Inventor: Seoung Han Jeoung