With Screen Patents (Class 313/408)
  • Patent number: 10224465
    Abstract: A method of manufacturing a light emitting device includes: providing particles of a fluorescent material; providing a substrate having a light emitting element mounted thereon; providing a first resin solution and a second resin solution that are two components of a two-component type curable resin; mixing the particles of the fluorescent material in the first resin solution to obtain a first suspension; mixing the second resin solution with the first suspension to obtain a second suspension, and applying the second suspension on the light emitting element and curing the second suspension to obtain a sealing member.
    Type: Grant
    Filed: March 23, 2017
    Date of Patent: March 5, 2019
    Assignee: NICHIA CORPORATION
    Inventors: Tomoaki Tsuruha, Noritsugu Uchiwa
  • Patent number: 9529256
    Abstract: A black photoresist composition capable of emitting infrared light, a method of preparing the black photoresist composition capable of emitting infrared light, a color filter comprising a Black Matrix formed from the black photoresist composition capable of emitting infrared light, and a display device including the color filter. The black photoresist composition capable of emitting infrared light includes, based on the total weight of the composition, 2% to 15% of a color mixed material, 30% to 90% of a solvent, 2% to 20% of an alkali-soluble resin, 2% to 20% of an ethenoid unsaturated monomer, 0.01% to 1% of photoinitiator, and 0.005% to 0.02% of other additives; wherein the color mixed material includes a colorant and a surface-modified infrared light-emitting material at a weight ratio of 19:1 to 1:1.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: December 27, 2016
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Jiuxia Yang, Feng Bai, Yiming Zhao, Xiao Sun, Bing Bai
  • Publication number: 20120091878
    Abstract: In an electron beam display in which electron-emitting devices 10 each emit an electron beam 5 that is non-uniform on the electron beam 5 irradiation surface of a corresponding pixel 7, the present invention allows possible luminance unevenness to be prevented while maintaining the brightness of a screen. The electron beam display includes light transmission suppressing portions 12 configured to cover respective light-transmitting apertures 8 each formed in the corresponding pixel 7 in order to allow light to be derived through the aperture, corresponding to a position on the electron beam 5 irradiation surface where the pixel 7 irradiated with the electron beam 5 by the electron-emitting device 10 exhibits the highest current density; and to have 10% to 28% of the aperture 8 in area.
    Type: Application
    Filed: September 29, 2011
    Publication date: April 19, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Minoru Ookoba
  • Patent number: 7541727
    Abstract: A cathode ray tube is disclosed, in which a shadow mask satisfies the following condition: Rx<1200 mm or Ry<1200 mm, and further satisfies the following condition: 0<Rd<3000 mm or Rd <?1500. The structural strength of the shadow mask is increased, thereby greatly improving thermal distortion and vibration problems of the shadow mask as well as greatly improving the qualities such as the drop characteristic, doming characteristic and inner pin distortion problem.
    Type: Grant
    Filed: February 23, 2006
    Date of Patent: June 2, 2009
    Assignee: LG. Philips Displays Korea Co., Ltd.
    Inventor: Sang Hyung Kang
  • Patent number: 7265484
    Abstract: The radius of curvature of an outer surface of a panel useful portion is 10,000 mm or more. Assuming that a length of a perforated region of a shadow mask in an X-axis (major axis) direction is 2L, s is a variable satisfying 0<s<1, a sagging amount difference of the perforated region at a point of X=sL with respect to a point of X=0 on the X axis and a sagging amount difference of the perforated region at a point of X=L with respect to the point of X=sL on the X axis are ?Z01(s) and ?Z02(s), respectively, a sagging amount difference of the perforated region at the point of X=sL with respect to the point of X=0 on the long side and a sagging amount difference of the perforated region at the point of X=L with respect to the point of X=sL on the long side are ?Z11(s) and ?Z12(s), respectively, when ?(s) represented by ?(s)=(?Z01(s)/?Z11(s))/(?Z02(s)/?Z12(s)) is defined, d?(s)/ds?0.4 is satisfied in at least a portion in a range of 0.2?s?0.8.
    Type: Grant
    Filed: May 31, 2005
    Date of Patent: September 4, 2007
    Assignee: Matsushita Toshiba Picture Display Co., Ltd.
    Inventors: Fumiaki Nihei, Norio Shimizu, Toshio Uchikawa
  • Patent number: 7187113
    Abstract: A cathode ray tube includes a shadow mask having a faceplate portion and a skirt portion. The faceplate portion includes an apertured portion. A frame is provided having a supporting portion and a bottom portion that extends by width Da from the short side of the supporting portion. Da satisfies the relation Da<Ha×La/P+Na, where La represents a distance between a center point of the faceplate portion and a short side of the apertured portion, Na represents a distance between the short side of the apertured portion and a short side of the border of the faceplate portion, P represents a distance between the electron beams deflection center and the center point of the faceplate portion, and Ha represents a distance between the short side of the border of the faceplate portion and a short side of a rear end line of the supporting portion.
    Type: Grant
    Filed: May 25, 2004
    Date of Patent: March 6, 2007
    Assignee: LG.Philips Displays Korea Co., Ltd.
    Inventors: Sang Yoon Park, Jong Eon Choi, Pyeong Soo Jeong
  • Patent number: 7098582
    Abstract: A cathode ray tube comprises a panel having a fluorescent formed on an inner surface thereof; a funnel connected to the panel; an electron gun housed in the funnel emitting electron beams; a deflection yoke for deflecting the electron beams in horizontal and vertical directions; a shadow mask for selecting colors of the electron beams; and a mask frame for supporting the shadow mask, in which an outer surface of the panel is substantially flat and an inner surface has a designated curvature, and a radius of curvature from a center of the shadow mask in a major-axis, minor-axis and diagonal-axis direction is substantially same.
    Type: Grant
    Filed: November 21, 2003
    Date of Patent: August 29, 2006
    Assignee: LG. Philips Displays Korea Co., Ltd.
    Inventor: Yong Kun Kim
  • Patent number: 7091655
    Abstract: Color cathode-ray tube comprising a color selection mask tensioned in at least one direction inside a metal frame, the said frame comprising on at least two opposed sides means for damping vibrations of the mask of the type comprising a central part joined to the surface of the frame and two wings extending on each side of the central part and coming into contact with the mask.
    Type: Grant
    Filed: September 4, 2002
    Date of Patent: August 15, 2006
    Assignee: Thomson Licensing
    Inventor: Enzo Arata
  • Patent number: 7061172
    Abstract: A flat color cathode ray tube having excellent doming quality is obtained by improving the structure of a flat panel and by using a shadow mask made of AK (aluminum-killed) material. According to the cathode ray tube, an outer surface of a panel used for the cathode ray tube is substantially flat, and an inner surface thereof has a curvature, and a transmittance ratio of ending portion of an effective surface to central portion of the panel is in the range of 0.4 to 0.6, and the radius of diagonal curvature (Rd) of the inner surface of the panel is in the range of 1.29R to 4.35R (R=1.767×diagonal length of effective surface), and a shadow mask is made of AK material. The cathode ray tube embodying the principles of the present invention is very advantageous in that it has a price as low as half the price of the conventional cathode ray tube, yet its panel uses a shadow mask made of AK material which has a doming quality equivalent to that of a shadow mask made of Invar material.
    Type: Grant
    Filed: October 8, 2002
    Date of Patent: June 13, 2006
    Assignee: LG.Philips Displays Korea Co., Ltd.
    Inventor: Sung Han Jung
  • Patent number: 7030546
    Abstract: Disclosed is an LCD device including an electromagnetic wave shielding member for shielding the electromagnetic waves generated from electric power applied to lamp of backlight assembly. The shielding member comprising conductive material is coated on surface of a diffusing plate to have mesh shape. The shielding member is filled into groove formed on the surface of the diffusing plate to have mesh shape. Accordingly, the electromagnetic waves may be shielded from the LCD panel. Furthermore, the shielding member makes electrical contact with the chassis of the LCD device through various ground members so as to be connected to an earth potential, thereby being stabilized electrically. Accordingly, display quality of the LCD device is improved. A conductive tape is used as the ground member, and the conductive tape is strongly fixed to the chassis of the LCD device by means of conductive fixing clip or conductive screw.
    Type: Grant
    Filed: July 28, 2003
    Date of Patent: April 18, 2006
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Byung-Woong Han, Jong-Dae Park, Jeong-Hwan Lee
  • Patent number: 7019451
    Abstract: The color cathode-ray tube includes a panel having a fluorescent screen formed on the inner surface thereof, a funnel coupled to the panel, an electron gun mounted into the neck portion of the funnel for emitting electron beams toward the fluorescent screen, and a shadow mask mounted on the fluorescent screen formed on the inner surface of the panel and having a predetermined distance from the fluorescent screen for carrying out color selection. The shadow mask is in a rectangular shape having a longer axis and a shorter axis and including a plurality of beam through apertures. The vertical pitch of the beam through apertures is between 0.15 mm and 0.35 mm. The vertical pitch of the beam through apertures increases as it goes from the central portion to the end portion of the shorter axis of the shadow mask.
    Type: Grant
    Filed: February 27, 2003
    Date of Patent: March 28, 2006
    Assignee: LG. Philips Displays Co., Ltd.
    Inventor: Su-Dong Kang
  • Patent number: 7012356
    Abstract: The present invention provides A color cathode ray tube comprising: a panel having a flat outer surface and an inner surface that has a predetermined curvature; and a shadow mask, wherein B2 P2 ? B3 P3 where B1 is a length of a bridge as a distance between holes in a vertical direction at a center portion of the shadow mask; B2 is a length of a bridge as a distance between holes in a vertical direction at four corner portions of the shadow mask; B3 is a length of a bridge as a distance between holes at edge portions of the shadow mask in a direction of a long axis thereof; P1 is a vertical pitch of the holes at the center portion of the shadow mask; P2 is a vertical pitch of the holes at the four corner portions of the shadow mask; and P3 is a vertical pitch of the holes at the edge portions of the shadow mask in a direction of a long axis thereof.
    Type: Grant
    Filed: March 13, 2003
    Date of Patent: March 14, 2006
    Assignee: LG. Philips Displays Korea Co., Ltd.
    Inventors: Jin Tae Park, Je Yun Bae
  • Patent number: 7012359
    Abstract: The mask body satisfies the following conditions, (ZMD?ZMH)/LMS?0.020, and 0.065?ZMD/LMD?0.095 where in a substantially rectangular effective region with a predetermined curvature of the mask body, LMD is a distance between a central part and a diagonal-axis end of the effective region, LMS is a distance between a horizontal-axis end and the diagonal-axis end of the effective region, ZMD is a height difference between the central part and the diagonal-axis end in a direction of the tube axis, and ZMH is a height difference between the central part and the horizontal-axis end in the direction of the tube axis. With this structure, the mechanical strength of the mask body can be improved, and deformation of the mask body in a fabrication process and due to external shock can be prevented.
    Type: Grant
    Filed: August 3, 2004
    Date of Patent: March 14, 2006
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Norio Shimizu, Toshio Uchikawa
  • Patent number: 7002286
    Abstract: A color cathode-ray tube includes a panel having a fluorescent screen on its inside, a funnel which is coupled to the panel and has a cone portion at which a deflection yoke is installed, an electron gun which is installed in a neck portion of the funnel, and a shadow mask frame assembly which is installed at the inside of the panel and includes a shadow mask and a frame. The shadow mask includes an apertured portion which has a plurality of electron beam passage holes, an imperforate portion which extends from and surrounds a periphery of the apertured portion, and a skirt portion which is bent from a periphery of the imperforate portion and has a plurality of etched portions and embossments that are formed in the skirt portion. The frame is partially welded to the skirt portion of the shadow mask to support the shadow mask.
    Type: Grant
    Filed: January 23, 2003
    Date of Patent: February 21, 2006
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Chan-woo Kim, Sang-hyun Eom
  • Patent number: 6998765
    Abstract: Disclosed is a color cathode ray tube which can effectively improve impact resistance by setting a ratio of a curvature coefficient (a/b) of the shadow mask for a long axis to be in a range of about 100,000–135,000, and by setting a ratio of a curvature coefficient (c/d) of the shadow mask for a short axis to be in a range of about 60,000–360,000. Also, in defining ratios between a curvature radius of a center portion of the shadow mask and curvature radiuses along a horizontal direction, a vertical direction, and a diagonal direction, the curvature radius decreases towards the peripheral portions of the shadow mask, thereby improving impact resistance and drop characteristics and thus effectively preventing color purity from being degraded.
    Type: Grant
    Filed: December 8, 2003
    Date of Patent: February 14, 2006
    Assignee: LG.Philips Display Korea Co., Ltd.
    Inventor: Yong-Kun Kim
  • Patent number: 6995503
    Abstract: A cathode ray tube is provided, in which the flatness of a tension mask constituting a color-selection mechanism is maintained by a suitable stretching force, while with the tension mask, the influence of external magnetic fields, such as the terrestrial magnetism is suppressed, and the shifting of the electron beam is reduced. A tension mask made of a magnetostrictive material is used, the tension mask is stretched by a stretching force in a range maintaining the flatness of the tension mask, and the direction and strength of the stretching force are set such that vertical magnetic permeability of the tension mask increases, due to a magnetoelastic effect caused by the stretching force in the magnetostrictive material of the tension mask.
    Type: Grant
    Filed: August 10, 2001
    Date of Patent: February 7, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shin-ichiro Hatta, Ryuichi Murai, Hiroshi Iwamoto, Shigeo Nakatera, Tetsuro Ozawa
  • Patent number: 6979943
    Abstract: In a cathode ray tube including a panel provided with a phosphor screen, a funnel integrated with the panel, an electron gun disposed inside the funnel, a magnetic shield (1) for shielding an electron beam (5) emitted from the electron gun against an external magnetic field, and a frame (2) for holding the magnetic shield (1), the magnetic shield (1) includes, at a portion to be joined with the frame (2), a bent portion (20) bent toward a tube axis side, and a thickness T of the bent portion (20) at its edge on the tube axis side is 0.08 mm or less. By making the thickness T small, halation that is liable to occur in a cathode ray tube with a large deflection angle can be suppressed because electron beams reflected from an end face (11) and allowed to reach the screen without being shielded by the frame (2) are reduced.
    Type: Grant
    Filed: March 14, 2002
    Date of Patent: December 27, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Naoki Yamauchi, Hideo Iguchi, Hideharu Omae, Yoshimi Kumei, Tetsuro Ozawa, Yoko Kannan
  • Patent number: 6972515
    Abstract: In a flat type color cathode ray tube, in using of a tint or a dark tint panel capable of improving contrast characteristics of a screen and reducing production processes, namely, having the conventional coating process reduction advantage, by optimizing a horizontal pitch and a transmissivity of a shadow mask and a transmissivity of a screen in order to solve a brightness balance deterioration problem at the circumference portion of the screen due to a glass transmissivity difference, it is possible to maintain inner impact resistance and howling characteristics of the shadow mask, in addition, by improving a circumference portion transmissivity of the shadow mask and a screen transmissivity, it is possible to improve a brightness balance at the circumference portion and a quality of the screen.
    Type: Grant
    Filed: May 29, 2002
    Date of Patent: December 6, 2005
    Assignee: LG. Philips Displays Korea Co., Ltd.
    Inventor: Hoon Jeong
  • Patent number: 6954026
    Abstract: Each of a plurality of arrays of apertures of a shadow mask has a vertically long aperture, a vertically short aperture and a bridge between these apertures. In each of the arrays of apertures, one long aperture and one or more short apertures are arranged alternately, and a horizontal maximum width HSmax of the short aperture is larger than a horizontal basic width HL of the long aperture. This makes it possible to provide a color cathode ray tube having an improved brightness without causing moiré fringes, color displacement, breaking of the shadow mask or variation in color purity.
    Type: Grant
    Filed: June 5, 2003
    Date of Patent: October 11, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Hideaki Etou
  • Patent number: 6940229
    Abstract: With respect to a highly flat glass bulb for cathode ray tube having an effective screen diameter along a diagonal axis of a glass panel 10 of more than or equal to 500 mm, and an average radius of curvature of an outer surface of a face portion of more than or equal to 10,000 mm, a ratio between a length h of a skirt portion 13 of the glass panel and a distance H in the tube axis direction from an edge surface portion where a funnel is sealed with the glass panel to a reference line is defined so as to fall within a predetermined range in relation to a deflection angle ? of the funnel representing substantial degree of divergence in the tube axis direction of the funnel, thereby achieving reduction of weight of the glass bulb while maintaining a certain mechanical strength, as well as suppressing breakage during frit seal heating process.
    Type: Grant
    Filed: May 5, 2003
    Date of Patent: September 6, 2005
    Assignee: Nippon Electric Glass Co., Ltd.
    Inventor: Masaya Kyono
  • Patent number: 6922012
    Abstract: A panel (2) of a vacuum envelope includes a substantially rectangular effective portion (8) having a substantially flat outer surface and also having a phosphor screen 1 formed on an inner surface, and a skirt portion (9) provided along a peripheral part of the effective portion and extended substantially perpendicularly to the effective portion. A funnel (3) is bonded to the skirt portion. A reinforcing band for fastening the skirt portion is attached round an outer surface of the skirt portion. When a distance in a direction of the tube axis from a bonding part between the panel and the funnel to an end of the reinforcing band on the outer surface side of the effective portion is represented by a and a distance in the direction of the tube axis from the bonding part to a central position of the outer surface of the effective portion is represented by h, the reinforcing band is arranged to satisfy a ?0.9h.
    Type: Grant
    Filed: February 15, 2000
    Date of Patent: July 26, 2005
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takuya Mashimo, Norio Shimizu, Masatsugu Inoue
  • Patent number: 6919673
    Abstract: A shadow mask is arranged to face a phosphor screen formed on an inner surface of a panel. A plurality of aperture columns are formed in parallel in the shadow mask. Each aperture column includes a plurality of apertures arranged in line at a predetermined interval. On both sides of each aperture column on the surface of the shadow mask facing the electron gun, stripe-shaped dielectric layers for acting on electron beams toward the apertures are formed respectively, and extend in substantial parallel with the aperture columns. The shadow mask is manufactured in such a manner that stripe-shaped insulating material layers are formed on the surface of a mask base material facing the electron gun, the mask base material is thereafter shaped into a predetermined shape, and the insulating material layers on the shaped mask are sintered.
    Type: Grant
    Filed: January 25, 2002
    Date of Patent: July 19, 2005
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tohru Takahashi, Masatsugu Inoue, Kumio Fukuda, Masaru Nikaido, Hitoshi Shiozawa, Akiyoshi Nakamura, Satoshi Ishikawa
  • Patent number: 6917150
    Abstract: A subject of the present invention is to provide for a shadow mask material for a color picture tube with excellent tensile strength and excellent high temperature creep strength, a shadow mask made of the shadow mask material and a color picture tube with the shadow mask. Material for a shadow mask is made from low carbon steel containing manganese of equal or more than 0.60 wt % and aluminum of 0.002 to 0.12 wt %. A shadow mask is made of the material and the shadow mask is installed in a picture image tube.
    Type: Grant
    Filed: June 20, 2001
    Date of Patent: July 12, 2005
    Assignee: Toyo Kohan Co., Ltd.
    Inventors: Shinichi Aoki, Toshiyuki Ueda, Naomi Yabuta, Masahiro Fukumoto, Jun Agari
  • Patent number: 6909227
    Abstract: The present invention provides a color cathode ray tube having a shadow mask for selecting colors, wherein the shadow mask satisfies the relation: 5.5 < Rh ( H 2 ) < 8.0 , where Rh is a mean curvature radius in the direction of the long axis of the shadow mask, H is a distance between both ends in a direction of a long axis of an effective surface of the shadow mask, and a mean curvature radius in the direction of the long axis satisfies the condition: Rh = ( H 2 ) 2 + Zh 2 2 * Zh where Zh is a recess amount in a direction of a tube axis at an end of the long axis of the effective surface with respect to a center of the effective surface.
    Type: Grant
    Filed: September 9, 2004
    Date of Patent: June 21, 2005
    Assignee: LG. Philips Displays Korea Co., Ltd.
    Inventors: Jin Tae Park, Je Yun Bae
  • Patent number: 6906454
    Abstract: A shadow mask includes an aperture area having a plurality of apertures through which electron beams pass; a non-aperture area extending a from a circumference of the aperture area; and a skirt formed extending from an outer circumference of the non-aperture area at a predetermined angle, wherein the front surface of the aperture area is formed satisfying the following conditions, 100%<RMV?/RMV<110% 120%<RMS/RMV?<150% where RMV is a vertical radius of curvature of the front surface of the aperture area with respect to a vertical direction passing through a center of the aperture area, RMS is a vertical radius of curvature with respect to a short side of the aperture area, and RMV? is a vertical radius of curvature of the front surface of the aperture area with respect to the vertical direction at a location on a horizontal axis passing through the center of the aperture area.
    Type: Grant
    Filed: June 20, 2003
    Date of Patent: June 14, 2005
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Hyung-Seok Oh, Dong-Hwan Kim
  • Patent number: 6890237
    Abstract: A method of manufacturing a shadow mask assembly, in which a shadow mask is fastened to a support frame in a tensioned state, includes applying a preliminary tension force with a magnitude of 9.8 to 490 N to the four corners of the shadow mask outwardly aslant with respect to sides of the shadow mask. A main tension force is then applied to each of at least a pair of mutually opposite sides of the shadow mask outwardly perpendicularly to the sides. Thereafter, the shadow mask to which the main tension forces have been applied is fastened to the frame side of the support frame.
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: May 10, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Naomi Nishiki, Tosinobu Yokoyama, Yuji Uesugi, Kiyotaka Ihara, Ayumu Takakuwa, Kiyohito Miwa, Yoshikazu Iwai
  • Patent number: 6885141
    Abstract: A cathode ray tube comprises a panel; a funnel engaged to the panel for forming a vacuous space; and a shadow mask supported in the cathode ray tube by being fixed to a mask frame and including an effective surface having a plurality of electron beam passing holes at a center thereof, an ineffective surface formed at a periphery of the effective surface and not having the electron beam passing holes and a skirt portion extended from the ineffective surface towards a vertical direction thereof and welded to the mask frame. In the cathode ray tube, a slot of a predetermined size is formed between welding points by which the skirt portion is welded to the mask frame, and a height of the slot from an end of the skirt portion is higher than a height of the welding points, thereby reducing a doming effect of the shadow mask, reducing a mis-landing which the electron beam does not land to a precise landing point, and thus preventing a color purity of a screen from being deteriorated.
    Type: Grant
    Filed: April 2, 2003
    Date of Patent: April 26, 2005
    Assignee: LG. Philips Displays Korea Co. Ltd.
    Inventor: Sung-Yong Park
  • Patent number: 6879094
    Abstract: A color cathode ray tube comprising a panel having a substantially flat outer surface, a funnel mounted on a rear side of the panel, a shadow mask including a plurality of electron beam through holes, and a mask frame for supporting the shadow mask, said mask frame satisfying the following condition: d/v?0.9, d/h?0.9 wherein d is a height of a center of a diagonal portion of the mask frame, h is a height of a center of a short side portion of the mask frame, and v is a height of a center of a long side portion of the mask frame.
    Type: Grant
    Filed: March 20, 2003
    Date of Patent: April 12, 2005
    Assignee: LG. Philips Displays Korea Co., Ltd.
    Inventor: Oh-Yong Choi
  • Patent number: 6879092
    Abstract: A structure of a slot feature for a shadow mask in which, on the assumption that the width at the point of ½ in a vertical direction in the feature of slots of the shadow mask is ‘Sw’, horizontal distances from a virtual vertical line passing an apex of a concave portion of a slot at a marginal portion to a protrusion portion formed at both upper and lower sides on the basis of the width Sw line are ‘M’ and ‘N’, and angles inclined in the direction of the protrusion portion from the virtual straight line passing the apex of the curved protrusion portion formed at the opposite side of the concave portion are ‘P’ and ‘Q’, there are at least one and more mask slot satisfying a formula of M>0, N>0, P>0°, Q>0°. The shape of electron beams by positions on the screen are identical to each other, and the shape of electron beam at the left and right sides of marginal portion can be maintained in a straight line in the vertical direction.
    Type: Grant
    Filed: September 12, 2002
    Date of Patent: April 12, 2005
    Assignee: LG. Philips Displays Korea Co., Ltd.
    Inventor: Gi Hoon Tho
  • Patent number: 6873096
    Abstract: The present invention provides an improved support blade structure for use on a tension mask frame assembly. The support blade structure is formed of a material having a first coefficient of thermal expansion and includes fastening portions and an insert member connected at a generally central location to the support blade structure. The insert member is formed of a material having a second coefficient of thermal expansion and has a plurality of apertures extending in a row along its length. The aperatures are dimensioned to be larger than the fastening portions passing therethrough to loosely connect the insert member to the support blade structure. This allows the insert member to be connected at the center while it's end are free to slide relative to the support blade structure during thermal cycling.
    Type: Grant
    Filed: June 13, 2001
    Date of Patent: March 29, 2005
    Assignee: Thomson Licensing S.A.
    Inventor: Alan Weir Bucher
  • Patent number: 6858977
    Abstract: The cathode-ray tube according to the present invention has on the inner surface of the funnel section of the body thereof a laminated layer comprising a first layer of black material, a metal backing layer and a second layer of black material. According to the configuration of the cathode-ray tube of the present invention, stray light reflected within the body of the cathode-ray tube is absorbed by the first layer of black material on the inner surface of the funnel, while stray light reflected off the inner surface of the funnel is absorbed by the second layer of black material. This makes it possible to reduce the amount of stray light incident upon the effective screen area of the panel section.
    Type: Grant
    Filed: May 23, 2002
    Date of Patent: February 22, 2005
    Assignee: Sony Corporation
    Inventors: Tsuneharu Nomura, Norihiro Ohse, Tomohiko Abe, Michihisa Yano, Seiji Kawaberi, Hisashi Kimura, Tsutomu Arai
  • Patent number: 6844667
    Abstract: A panel for a cathode ray tube having an inner surface with predetermined roughness, including a plurality of black matrix layers formed on the inner surface and a phosphor layer composed of red, green and blue phosphors between the black matrix layers, and the phosphor layer and the black matrix layer are formed on the inner surface of the panel after forming a transparent dielectric film, can prevent degradation of brightness and color purity of a screen caused as a result of grinding process which gives roughness to an inner surface of the panel in order to prevent mirror surface reflection on the inner surface of the panel caused by external light.
    Type: Grant
    Filed: April 2, 2003
    Date of Patent: January 18, 2005
    Assignee: Lg. Philips Displays Korea Co., Ltd.
    Inventors: Jong-Tae Choi, Bum-Sik Seo
  • Patent number: 6841927
    Abstract: A color cathode ray tube capable of improving the luminance attenuation characteristic and the explosion-proof characteristic through an improved shape of a panel is disclosed. In an equation F=Rdo/(Sd H 1.767), F>21, Tc/CFT?1.35, and Rdi>(Ryi or Rxi) are satisfied, wherein Sd is a length of a diagonal effective picture of the panel, Rdo is a curvature radius of a diagonal outer surface, Ryo is a curvature radius of a vertical outer surface, Rxi, Ryi and Rdi are a horizontal, vertically and diagonal curvature radius, respectively, CFT is a thickness of a center portion, Tc is a thickness of a diagonal end of the effective surface, F is a planarizing rate of the outer curvature.
    Type: Grant
    Filed: May 6, 2002
    Date of Patent: January 11, 2005
    Assignee: LG. Philips Displays Korea Co., LTD
    Inventor: Tae Hoon Lee
  • Patent number: 6836062
    Abstract: A cathode ray tube including a tube realized through a face panel, a funnel, and a neck; a color selection apparatus including a shadow mask having a an effective area with apertures and a mask frame supporting the shadow mask; an electron gun mounted in the neck and emitting electron beams; a deflection apparatus generating a magnetic field to deflect the electron beams; and a moire compensation circuit performing moire compensation, wherein the color selection apparatus satisfies the following condition, 0.76 ≥ Ke Ko ≥ 0.
    Type: Grant
    Filed: February 25, 2003
    Date of Patent: December 28, 2004
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jun-Jong Lee, Ki-Youn Jun, Jong-Han Rhee
  • Patent number: 6825598
    Abstract: A tension mask cathode ray tube has a vacuum tube and an inner shield mounted within the vacuum tube to shield the vacuum tube from geomagnetism. A value Br/Hc of the inner shield where Br indicates a residual magnetic flux density and Hc indicates a coercive force is established to be 1.0-2.0 times more than a value Br/Hc of the mask frame. In this structure, the route of electron beams is established to be more precise. Consequently, the purity characteristic and the convergence characteristic are improved while forming a precise raster. In this way, the display screen quality can be enhanced.
    Type: Grant
    Filed: January 13, 2003
    Date of Patent: November 30, 2004
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Hyang-Jin Koh, Seong-Seob Kim, Jong-Heon Kim, Tae-Yong Kim
  • Patent number: 6824625
    Abstract: The invention relates to a magnetostriction control alloy sheet advantageously used as a high resolution shadow mask having a low coefficient of thermal expansion, superior magnetic properties and a high Young's modulus after a blackening process, a manufacturing process for the same, and a part for a color Braun tube such as a shadow mask. The magnetostriction control alloy sheet comprises C at 0.01 wt. % or less, Ni at 30 to 36 wt. %, Co at 1 to 5.0 wt. %, and Cr at 0.1 to 2 wt. %, the remainder Fe and unavoidable impurities, and having a magnetostriction &lgr; after the softening and annealing of (−15×10−6) to (25×10−6).
    Type: Grant
    Filed: July 19, 2001
    Date of Patent: November 30, 2004
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Norio Fukuda, Shinya Nakamura, Hiroyuki Yamada, Akira Makita, Tsutomu Hatano, Nobuaki Kanayama, Takahito Aoki
  • Patent number: 6812627
    Abstract: A mask assembly is formed to have a tension mask with a screen part for transmitting electron beams. The mask assembly is intended for use with a cathode ray tube. The screen part includes real slots, dummy slots, real bridges, dummy bridges, and strip parts. The screen part has a first portion and a second portion. The first portion has real bridges, dummy bridges, and dummy slots. The second portion has real bridges and real slots, but no dummy bridges and no dummy slots. The second portion of the screen part can be said to be associated with a center region that traditionally has degraded images due to undesired black lines. The second portion of the screen part is formed to have real bridges, real slots, no dummy bridges, and no dummy slots in order to provide improved clarity. The mask assembly has a tension mask which extends in either a longitudinal or transverse direction, and a mask frame for reinforcing the structural strength while maintaining an extended state of the tension mask.
    Type: Grant
    Filed: February 20, 2002
    Date of Patent: November 2, 2004
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Sang-Ho Chun, Jun-Jong Lee, Hyang-Jin Ko, Jong-Han Lee
  • Patent number: 6784606
    Abstract: A color cathode-ray tube (CRT) having an evacuated envelope with an electron gun therein for generating at least one electron beam is provided. The envelope further includes a faceplate panel having a luminescent screen with phosphor elements on an interior surface thereof. A focus mask, having a plurality of spaced-apart first conductive strands, is located adjacent to an effective picture area of the screen. The spacing between the first conductive strands defines a plurality of apertures substantially parallel to the phosphor elements on the screen. Each of the first conductive strands has a substantially continuous insulating material layer formed on a screen facing side thereof. A plurality of second conductive wires are oriented substantially perpendicular to the plurality of first conductive lines and are bonded thereto by the insulating material layer. The insulating material layer comprises a low porosity lead-zinc-borosilicate glass.
    Type: Grant
    Filed: December 20, 2000
    Date of Patent: August 31, 2004
    Assignee: Thomson Licensing S. A.
    Inventors: Attiganal Narayanaswamy Sreeram, Leszek Hozer
  • Patent number: 6784856
    Abstract: A display with inherent means for avoiding moiré patterns in displayed digitized images having a two-dimensional array of non-uniformly spaced display elements such as LEDs, LCD, or TFT. Pixels within the display are non-uniformly spaced such that a fundamental pattern or “frequency” is not established, thereby avoiding the possibility of display physical characteristics interfering with image features, avoiding apparent moiré patterns and other display artifacts. If the source data for the image is a standard data set which represents data samples at uniformly-spaced pixels, the method interpolates the pixel values for the non-uniformly spaced display elements of the new array.
    Type: Grant
    Filed: December 13, 2001
    Date of Patent: August 31, 2004
    Assignee: International Business Machines Corp.
    Inventor: Viktors Berstis
  • Patent number: 6781301
    Abstract: A color cathode-ray tube employs a tint or dark tint glass panel having optimal transmittance in order to solve a problem of brightness balance of a periphery to a center of a screen becoming degraded due to a difference between glass transmittances. The cathode-ray tube comprises a panel, an external surface of which is substantially flat and an internal surface of which has a fluorescent screen with a predetermined curvature, and a shadow mask which is placed at a predetermined distance apart from the internal surface of the panel and has a plurality of electron beam through-holes formed therein.
    Type: Grant
    Filed: November 18, 2002
    Date of Patent: August 24, 2004
    Assignee: LG. Philips Displays Korea Co., Ltd.
    Inventor: Hoon Jeong
  • Patent number: 6781299
    Abstract: A tension mask assembly for a flat color Braun tube is disclosed, in which each of main frames is bent at a middle portion in the width direction, and has a portion perpendicular to a tension mask defining a partition and another portion opposite to the tension mask defining a lower plane, wherein widths of a middle portion and both ends of the lower plane are formed in the range of the following equation: 0 < w 1 - w 2 w 2 ≤ 1.0 . Also, it is possible to prevent the tension mask assembly from howling, and to prevent the tension mask from being deformed or broken during a heat treatment, and stiffness of the main frames can be enhanced.
    Type: Grant
    Filed: May 4, 2001
    Date of Patent: August 24, 2004
    Assignee: LG Electronics Inc.
    Inventor: Tae Hoon Lee
  • Publication number: 20040150315
    Abstract: A color cathode ray tube comprising a panel, said panel including an outer surface which is substantially flat and an inner surface on which a screen composed of red, green and blue phosphors is formed, wherein a screen transmittance of the panel increases and then decreases along a line from a center portion to a peripheral portion of the panel, thus to improve brightness uniformity of a center portion, a peripheral portion and a doming portion of the panel.
    Type: Application
    Filed: December 31, 2003
    Publication date: August 5, 2004
    Inventor: Ju-Sang Jung
  • Patent number: 6756725
    Abstract: A cathode ray tube includes a panel with a substantially flat outer surface and an inner curved surface. The inner curved surface of the panel has a phosphor screen. A funnel is connected to the panel while externally mounting a deflection unit for deflecting electron beams. A neck is connected to the funnel while internally mounting an electron gun for emitting the electron beams. A color selection apparatus is internally fitted to the panel such that the electron beams land on correct phosphors of the phosphor screen. The panel has an effective screen with short and long axis. The panel bears a first thickness Th at the ends of the effective screen in the long axis direction, and a second thickness Tv at the ends of the effective screen in the short axis direction. The second thickness Tv of the panel is established to be larger than the first thickness Th of the panel.
    Type: Grant
    Filed: February 25, 2002
    Date of Patent: June 29, 2004
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jung-In Yoo, Do-Hun Pyun, Jun-Kyo In, Won-Ho Kim
  • Patent number: 6731054
    Abstract: A shadow mask for use in a cathode ray tube comprises a mask body having a mask effective section where a number of electron beam passage apertures are formed and a skirt portion provided at a peripheral edge of the mask effective section, and a mask frame arranged to be layered outside the skirt portion. The mask frame and the skirt portion are resistance-welded to each other at a plurality of portions. At each welding portion, a plurality of concave and/or convex portions each having a smaller area than an area of a contact surface of an electrode for resistance-welding are formed at an inner surface portion of the skirt portion which the electrode contacts.
    Type: Grant
    Filed: November 21, 2000
    Date of Patent: May 4, 2004
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yutaka Takeuchi, Kazumasa Hirayama, Masao Kobayashi
  • Patent number: 6724137
    Abstract: A tension mask frame assembly for a color cathode ray tube, includes: a tension mask having a plurality of strips on which slots are formed, the slots being separated by a predetermined distance from each other on a thin plate; real bridges for partitioning slots at a predetermined pitch interval by connecting adjacent ones of a plurality of strips to each other; and a frame which supports the corresponding edges of the tension mask; whereby the vertical pitch of the real bridges becomes smaller, such as in a stepwise relation, in a direction from the center portion of the tension mask to the peripheral portion of the tension mask.
    Type: Grant
    Filed: April 19, 2001
    Date of Patent: April 20, 2004
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Soon-Cheol Shin, Chan-Yong Kim, Sang-Shin Choi, Sang-Ho Jeon
  • Patent number: 6720722
    Abstract: A color picture tube having a tensioned mask supported by a frame mounted within the tube. The frame is constructed of a carbon steel material, and the mask is constructed of a nickel alloy material that expands substantially less per unit length than does the frame in the normal operating temperature range of the tube, and expands substantially the same per unit length as the frame in the higher thermal cycling temperature range used during tube processing.
    Type: Grant
    Filed: March 13, 2002
    Date of Patent: April 13, 2004
    Assignee: Thomson Licensing S.A.
    Inventors: Rein Roman Mutso, Edward Richard Garrity, Jr., Christopher Lee French
  • Publication number: 20040066130
    Abstract: A color picture tube has a compliant tension mask frame assembly mounted within said tube. The tension mask frame assembly includes a peripheral frame including opposing side support frame members is attached to the peripheral frame at a single location and the mask is attached to longitudinal edges of the intermediate members. Further included are clips that serve as guides for holding the intermediate members. Further included are clips that serve as guides for holding the intermediate members to the frame while permitting expansion of the frame relative to the intermediate members and permitting compliance.
    Type: Application
    Filed: July 15, 2003
    Publication date: April 8, 2004
    Inventor: Alan Weir Bucher
  • Patent number: 6713951
    Abstract: A shadow mask is formed by press molding and includes a substantially rectangular mask effective portion in the form of a gently sloped dome having electron beam passage apertures and a skirt portion extending from the peripheral edge of the mask effective portion. The skirt portion has a plurality of apertures arranged parallel to the peripheral edge of the mask effective portion and spaced from one another and belt portions formed between the apertures and an extending end edge of the skirt portion and extending along the extending end edge. Each of the apertures is formed so that its width increases from the peripheral edge of the mask effective portion toward the extending end edge side of the skirt portion.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: March 30, 2004
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hisakazu Okamoto, Tetsuya Masumura
  • Patent number: RE39739
    Abstract: A color picture tube is provided with a glass bulb in which the external surface of the effective display area of the face plate is formed substantially flat and a color selection mask, having the curvature projected toward the face plate, provided opposed to the internal surface of the face plate within the glass bulb. Therefore, the external surface is flat, the mechanical shock resistance characteristic is high, a tension can surely be applied to the color selection mask and moreover vibration of the color selection mask can be prevented even if external vibration is applied thereto.
    Type: Grant
    Filed: January 18, 2002
    Date of Patent: July 24, 2007
    Assignee: Sony Corporation
    Inventors: Yukinobu Iguchi, Ichiro Utsumi, Koji Saita
  • Patent number: RE41233
    Abstract: A cathode ray tube includes a panel having a substantially flat outer surface and an inner curved surface with a phosphor screen. The panel has a substantially rectangular effective screen portion with two long sides parallel to each other, two short sides parallel to each other and four rounded edges interconnecting each long side and the neighboring short side. The effective screen portion is structure such that a first line V1 interconnecting centers of the long sides, a second line H1 interconnecting centers of the short sides and a third line D1 interconnecting centers of the rounded edges opposite to each other meet at a point. The effective screen portion has a first thickness Tv at the centers of the long sides, a second thickness Th at the centers of the short sides, a third thickness Td at the centers of the edges and a fourth thickness Tc at the meeting point of the all three lines V1, H1 and D1.
    Type: Grant
    Filed: June 18, 2004
    Date of Patent: April 20, 2010
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Do-Houn Pyun, Wan Kim, Chan-Yong Kim