With Frame Patents (Class 313/407)
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Publication number: 20020171350Abstract: A cathode ray tube includes a panel having a front screen portion on which a phosphor screen is formed and a panel flange integrally formed on an edge of the front screen portion, a funnel connected to the panel flange, a deflection yoke disposed around the funnel, a neck connected to the funnel, an electron gun disposed in the neck, a color selection apparatus for selecting electron beams emitted from the electron gun and allowing the selected electron beams to land on corresponding phosphors, and an inner shield for shielding geomagnetism, the inner shield mounted on the color selection apparatus. The color selection apparatus includes a mask having a plurality of electron beam-passing apertures, the mask being rectangular and having a longitudinal axis and a lateral axis, a frame for supporting the mask in a tensioned state, and a pair of side shield members mounted on lateral sides of the frame to shield the geomagnetism.Type: ApplicationFiled: May 9, 2002Publication date: November 21, 2002Inventors: Chan-Yong Kim, Soon-Cheol Shin, Eung-Suk Lee, Si-Taeg Sung, Il-Hwan Jang, Won-Ho Kim, Do-Hun Pyun
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Patent number: 6483233Abstract: A color CRT is provided, which makes it possible to use a larger-sized shadow mask without increasing the size of a face panel. This CRT is comprised of a vacuum envelope having a face panel, a funnel connected to the panel, and a neck connected to the funnel. The envelope has a central longitudinal axis approximatley pernendicular to the panel. The panel has studpins fixed to the inside of its side walls. A shadow mask assembly is provided in the envelope, which includes a shadow mask and a frame for supporting the mask. The frame has an approximately rectangular front section, an approximately rectangular middle section, and an approximately rectangular rear section. The front section and the rear section extend in approximately parallel to the central longitudinal axis of the envelope. The front section is shifted outwardly with respect to the rear section to approach the side walls of the panel. The periphery of the mask is fixed to the front section.Type: GrantFiled: November 12, 1999Date of Patent: November 19, 2002Assignee: NEC CorporationInventor: Tsukasa Yasuda
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Publication number: 20020167259Abstract: A cathode ray tube is provided which includes a panel having a fluorescent surface formed on an inside surface thereof, a tension type shadow mask fitted to the panel with a gap formed therebetween, and a frame. The frame includes two main frames fixed to the tension type shadow mask under tension, and two subframes fixed respectively to ends of the two main frames. A distance between the two main frames between a center part or portion of the main frame and an edge part or portion. To assemble the frame assembly and the shadow mask, the main frames are compressed, the tension type shadow mask is welded thereto, and the compression applied to the main frames is then released. The invention improves a howling characteristic by reducing a vibratory length of the shadow mask and increasing a natural frequency of the center part or portion of the shadow mask.Type: ApplicationFiled: April 19, 2002Publication date: November 14, 2002Applicant: LG Electronics Inc.Inventor: Yong Kun Kim
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Patent number: 6479925Abstract: A shadow mask support frame for a color CRT is disclosed, in which a coupling portion between a main frame and a sub frame, and a shape of the sub frame are improved to increase the frequency of unique oscillation, thereby reducing a howling phenomenon occurring in a shadow mask. The shadow mask support frame for a color CRT includes: two main frames having hollow sections; two sub frames having solid sections, end portions respectively fixed into respective end portions of the main frames, a support portion inwardly extended with a predetermined length at an obtuse angle to the end portions, and a central portion inwardly extended with a predetermined length at an obtuse angle to the support portion; and a bracket mounted between respective end portions of the main frames and the sub frames, for reinforcing fixing portions of the main frames and the sub frames.Type: GrantFiled: August 11, 2000Date of Patent: November 12, 2002Assignee: LG Electronics Inc.Inventor: Sang Kee Kim
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Publication number: 20020158563Abstract: The present invention provides a color cathode ray including a pair of long frames, a pair of opposing short frames that are fixed to the pair of long frames and support the long frames, and a shadow mask fixed to the pair of long frames in a state applied with a tensile force. The short frames have substantially-triangular bent parts formed to protrude toward the shadow mask. Since such a cathode ray tube can decrease an internal moment of the shadow mask structure, the displacement of the shadow mask in a direction to recede from the phosphor screen surface of the color cathode ray tube can be suppressed and the q-value deviation also can be suppressed even if the shadow mask is expanded by heat generated by an impact of electron beams.Type: ApplicationFiled: March 5, 2002Publication date: October 31, 2002Applicant: Matsushita Electric Industrial Co. Ltd.Inventors: Kiyotaka Nakase, Yuichi Kimura
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Publication number: 20020158562Abstract: 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: ApplicationFiled: February 26, 2002Publication date: October 31, 2002Inventors: Hisakazu Okamoto, Tetsuya Masumura
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Patent number: 6472807Abstract: A Braun tube including a shadow mask, a panel for supporting the shadow mask, stud pins fitted between the shadow mask and the panel, and a frame of substantially rectangular form having a long side with a height in a range of (0.8-0.9)×(a height from a center of the stud pin to a central point of an inside surface of the panel), and a short side and a corner side each with a height in a range of (0.7-0.85)×(the height of the long side), thereby making the Braun tube stable from influences from doming, howling, and geomagnetism by optimizing respective heights of the frame to satisfy various requirements for the Braun tube at the same time when an overall size of the frame is increased, and permitting convenience of design.Type: GrantFiled: April 14, 2000Date of Patent: October 29, 2002Assignee: LG Electronics Inc.Inventor: Thae Seok Yoon
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Patent number: 6469431Abstract: A color cathode-ray tube that can attenuate vibration of an entire shadow mask positively with a simple structure. The color cathode-ray tube includes a frame-shaped mask frame and a shadow mask in which many apertures are formed in a flat plate, the shadow mask stretched and fixed in the mask frame in a condition in which a tension force is applied in one direction. The amplitude in the end portions of the shadow mask is not less than a certain amount relative to the amplitude in the center portion of the shadow mask, in a resonance of the shadow mask caused by a vibration propagated to the color cathode-ray tube. Furthermore, by providing vibration attenuators at the end portions of the shadow mask, vibrations at the end portions of the shadow mask are attenuated as the side surfaces of the shadow mask slide on the vibration attenuators. Thus, vibration of the entire shadow mask can be extinguished positively.Type: GrantFiled: August 27, 1999Date of Patent: October 22, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hideo Suzuki, Michiaki Watanabe, Yoshikazu Demi, Mitsunori Yokomakura
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Publication number: 20020149309Abstract: The present invention provides a tension mask having a frequency distribution with improved vibration damping. The tension mask includes a center portion between two edge portions.Type: ApplicationFiled: March 1, 2001Publication date: October 17, 2002Inventors: Joseph Arthur Reed, Gary Lee Diven
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Patent number: 6465942Abstract: A color cathode ray tube includes a generally rectangular shadow mask having a curved apertured portion having a multiplicity of electron-transmissive apertures, a curved imperforate portion surrounding and integral with the apertured portion and a skirt portion bent back from a periphery of the curved imperforate portion, and a generally rectangular support frame for suspending the shadow mask by spot welding the skirt portion thereto, within a panel portion of the color cathode ray tube. The skirt portion is provided with a plurality of embossments and is fitted inside the support frame. The embossments protrude inwardly and extend in a direction of a height of the skirt portion. A distance between a bottom of each of the plurality of embossments and a border of the curved apertured portion is at least 4.5 mm.Type: GrantFiled: June 22, 2001Date of Patent: October 15, 2002Assignees: Hitachi, Ltd., Hitachi Electronic Devices Co., Ltd.Inventors: Hiroshi Ito, Koji Hagiwara
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Publication number: 20020145375Abstract: A method and apparatus of maintaining spacing between tension mask strands in a tension mask. The method includes providing a tension mask with strands connecting therebetween and attaching a set of barrier ridge elements to a first side of the strands. Next, the tension mask is tensioned and affixed to a mask frame to form a mask frame assembly.Type: ApplicationFiled: April 7, 2001Publication date: October 10, 2002Inventors: Richard LaPeruta, Edward Richard Garrity
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Patent number: 6459194Abstract: A metal part inside of the cathode ray tube, including a first member and a second member which are different in thickness and welded to each other has a welding point encompassed to thereby form a hermetic space between the first and second members. Since the fine powder generated at the time of welding is contained within the hermetic space, its movement due to the vibration or the like is restrained.Type: GrantFiled: June 6, 2000Date of Patent: October 1, 2002Assignee: Sony CorporationInventor: Fujio Akita
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Publication number: 20020135289Abstract: The present invention provides a color cathode-ray tube that can attenuate vibration of an entire shadow mask positively with a simple structure. The color cathode-ray tube comprises a frame-shaped mask frame and a shadow mask in which many apertures are formed in a flat plate, the shadow mask being stretched and fixed in the mask frame in a condition in which a tension force is applied in one direction. The amplitude in the end portions of the shadow mask is not less than a certain amount relative to the amplitude in the center portion of the shadow mask, in a resonance of the shadow mask caused by a vibration propagated to the color cathode-ray tube. Furthermore, by providing vibration attenuators at the end portions of the shadow mask, vibrations at the end portions of the shadow mask are attenuated as the side surfaces of the shadow mask slide on the vibration attenuators. Thus, vibration of the entire shadow mask can be extinguished positively.Type: ApplicationFiled: May 15, 2002Publication date: September 26, 2002Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Hideo Suzuki, Michiaki Watanabe, Yoshikazu Demi, Mitsunori Yokomakura
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Publication number: 20020135288Abstract: A cathode ray tube comprising a color selection mask made from a material in tension and having a relatively low coefficient of thermal expansion, supported by a frame made from a material having a higher coefficient of thermal expansion. Along at least two sides of the frame are disposed two metal inserts made from a material whose coefficient of thermal expansion is similar to that of the mask. The inserts are secured to the opposed sides of the frame at their middle, and the mask is welded to the inserts. The mechanical problems relating to the differences in expansion of the materials making up the mask and the frame, during the high-temperature tube manufacturing steps, are avoided.Type: ApplicationFiled: March 22, 2001Publication date: September 26, 2002Inventors: Massimo De Marino, Pierluigi Testa
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Patent number: 6455992Abstract: The present invention provides an improvement in a color picture tube having a tension mask supported by a support frame mounted within said tube. The mask has a significantly lower coefficient of thermal expansion than the frame. The frame has two substantially parallel cantilevered members, each member has a distal edge to which the tension mask is attached. At least one of the distal edges has two sections separated by a gap therebetween. The two sections include an inner section and an outer section. The mask is glued to the inner section and is welded to the outer section.Type: GrantFiled: April 12, 1999Date of Patent: September 24, 2002Assignee: Thomson Licensing S.A.Inventors: Mark Allen Thomson, Edward Richard Garrity, Jr., James Francis Edwards
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Publication number: 20020130606Abstract: The present invention provides a color cathode-ray tube that can attenuate vibration of an entire shadow mask positively with a simple structure. The color cathode-ray tube comprises a frame-shaped mask frame and a shadow mask in which many apertures are formed in a flat plate, the shadow mask being stretched and fixed in the mask frame in a condition in which a tension force is applied in one direction. The amplitude in the end portions of the shadow mask is not less than a certain amount relative to the amplitude in the center portion of the shadow mask, in a resonance of the shadow mask caused by a vibration propagated to the color cathode-ray tube. Furthermore, by providing vibration attenuators at the end portions of the shadow mask, vibrations at the end portions of the shadow mask are attenuated as the side surfaces of the shadow mask slide on the vibration attenuators. Thus, vibration of the entire shadow mask can be extinguished positively.Type: ApplicationFiled: May 15, 2002Publication date: September 19, 2002Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Hideo Suzuki, Michiaki Watanabe, Yoshikazu Demi, Mitsunori Yokomakura
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Patent number: 6452318Abstract: A shadow mask has a rectangular mask body opposed to the phosphor screen of a panel, and a rectangular mask frame attached to a peripheral portion of the mask body, and is supported on the panel by three mask holders such that it can move relative to the panel. Each mask holder has a fixed portion fixed to the mask frame, an engagement portion engaged with side walls of the panel, and a slope portion connecting the fixed portion to the engagement portion with a distance interposed between them. The slope portion of each mask holder has a cross section smaller at its fixed-portion side than at its engagement-portion side, and also has a responsiveness to a displacement in the mask frame due to thermal expansion thereof. This responsiveness is higher at the fixed-portion side than at the engagement-portion side.Type: GrantFiled: November 29, 1999Date of Patent: September 17, 2002Assignee: Kabushiki Kaisha ToshibaInventor: Shuji Makimoto
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Publication number: 20020125809Abstract: A cathode ray tube comprises a color selection electrode with a shadow mask fixed to a frame and put under tension. The frame comprises a bimetal element (or bimetal elements) which are constructed such that at a raised temperature the tension is released by reducing the distance between sides of the frame to which the mask is attached. The reduction in distance at the center of the sides exceeds, preferably by a factor 1.5 to 3, the reduction in distance at the corners of said sides.Type: ApplicationFiled: August 22, 2001Publication date: September 12, 2002Inventor: Ronald Van Der Wilk
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Patent number: 6448702Abstract: A cathode ray tube includes (a) an electron gun, (b) a funnel which is open at one end and in which the electron gun is located, (c) a face panel which is open at one end and connected to the funnel such that the funnel and the face panel define a closed space, (d) an internal magnetic shield which is located in the space and which is open at opposite ends such that electrons emitted from the electron gun pass therethrough and reach the face panel, (e) a mask frame which internally supports the internal magnetic shield, and (f) a shadow mask which is located in the space in facing relation with the face panel and which is supported by the mask frame. The internal magnetic shield has an edge facing to the face panel. The edge has a closed cross-section and has a projecting portion at least partially projecting from the edge towards the face panel. The projecting portion has a distal end closer to the face panel than a distal end of the shadow mask.Type: GrantFiled: September 25, 2000Date of Patent: September 10, 2002Assignee: NEC CorporationInventors: Akihiro Kamada, Takashi Morohashi
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Publication number: 20020121852Abstract: The present invention relates to a damper wire of a tension type shadow mask in a cathode ray tube. The color cathode ray tube having a panel on which a frame is installed, a shadow mask fixed on the frame with a predetermined curvature and a plurality of damper wires mounted on the shadow mask, each of the damper wires fixed by means of a damper spring, which comprising the end portion of damper wire fixed in said damper spring positioning on or above an extension line of said predetermined curvature that is contacted with the end of said shadow mask.Type: ApplicationFiled: August 22, 2001Publication date: September 5, 2002Inventors: Sung-Dae Kim, Ho-Jun Lee
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Publication number: 20020117957Abstract: A color selection apparatus for a cathode ray tube includes a mask bearing a shape with short and long axes, and a frame combined with the mask. The mask is fitted to the frame while being tensioned either in the long axis direction or in the short axis direction. The mask has a plurality of strips spaced apart from each other by a predetermined distance, a plurality of real bridges disposed between the neighboring strips with a predetermined pitch while defining beam-guide holes, and one or more dummy bridges placed within each beam-guide hole while being extended from the strips in at least one direction. In any one reference column of m=0 and the other neighboring columns of m±n (n is a natural number), the real bridges arranged at the reference column are placed at lines different from the real bridges arranged at the columns of at least m±2 in the long axis direction.Type: ApplicationFiled: February 26, 2002Publication date: August 29, 2002Inventors: Jong-Han Rhee, Soon-Cheol Shin, Hyang-Jin Koh, Sang-Ho Jeon, Jun-Jong Lee
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Publication number: 20020117956Abstract: A tension mask frame assembly for a color cathode-ray-tube comprising a frame having four respective sides, two of the sides paralleling each other and having insert receiving brackets for supporting strand termination inserts therein and vertical mask strands welded to said termination inserts. The strands have a plurality of cross-wires extending perpendicular to the strands and attached thereto by a conductive bonding material. The wires and termination inserts are composed of materials having a first coefficient of thermal expansion. The frame and receiving brackets are composed of materials having a second coefficient of thermal expansion. The termination inserts thermally expand and contract independently of the frame and receiving brackets, whereby movement of the strands in the horizontal dimension is controlled by thermal expansion and contraction of the termination inserts and cross-wires.Type: ApplicationFiled: February 26, 2001Publication date: August 29, 2002Inventors: Istvan Gorog, Joey John Michalchuk, Richard William Nosker, Philip Michael Heyman
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Patent number: 6441546Abstract: A shadow mask assembly is provided, which reduces the necessary tensile force to be applied to the shadow mask and the weight and fabrication cost of the assembly itself.Type: GrantFiled: August 25, 2000Date of Patent: August 27, 2002Assignee: NEC CorporationInventor: Shinji Arai
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Patent number: 6441545Abstract: In a color cathode ray tube in which the external surface of an effective portion of a panel has a flat surface or a slight curvature, the shadow mask is set such that the layout distance between electron beam through hole array near the long side of an effective surface of the shadow mask is larger in the vicinity of the short axis than the layout distance at the center of the effective surface. Further, the layout distance becomes gradually smaller in direction away from the short axis, and thereafter, the layout distance changes to an increase. In the vicinity of the short side of the effective surface, the layout distance becomes equal to or larger than the layout distance near the short axis. Therefore, the curvature of the shadow mask and the electron beam through hole array are set in proper condition, and mislanding of beam landing due to deformation or oscillation of the shadow mask can be reduced. At the same time, howling of the phosphor screen can be minimized.Type: GrantFiled: March 2, 1999Date of Patent: August 27, 2002Assignee: Kabushiki Kaisha ToshibaInventors: Norio Shimizu, Shinichiro Nakagawa, Takuya Mashimo, Masatsugu Inoue
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Publication number: 20020113538Abstract: There is provided a color cathode-ray tube comprising a panel having a fluorescent plane formed on the inner face thereof, and a shadow mask arranged at the inner side of the panel having a predetermined distance therefrom, in which the shadow mask has an effective area in which electron beam passage holes are formed and a non- effective area surrounding the effective area, and at least one half etching line is formed at the non-effective portion of the shadow mask. Accordingly, shocks due to vibration of the cathode-ray tube are absorbed not to transmit to the shadow mask, improving the curved surface supporting strength of the shadow mask.Type: ApplicationFiled: July 9, 2001Publication date: August 22, 2002Applicant: LG Electronics Inc.Inventor: Hyun-shik Cho
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Patent number: 6437497Abstract: A color cathode ray tube includes a rectangular shadow mask made of an Fe-Ni alloy material, and having an apertured portion, an imperforate portion surrounding the apertured portion and a skirt portion bent back from the imperforate portion, and a rectangular support frame for suspending the shadow mask by spot welding the skirt portion thereto. The skirt portion is provided with plural slits and plural embossments extending in a direction of the height of the skirt portion in one of long and short sides of the skirt portion, and the slits and embossments are juxtaposed around a circumference of the skirt portion. A majority of the slits in the one of the long and shirt sides of the skirt portion are slits delimiting continuous openings in the skirt portion which are not bridged by members other than the support frame.Type: GrantFiled: July 25, 2001Date of Patent: August 20, 2002Assignees: Hitachi, Ltd., Hitachi Electronics Devices Co., Ltd.Inventors: Hiroshi Ito, Nobuhiko Hosotani, Masahiro Ito, Koji Hagiwara
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Patent number: 6437496Abstract: A tensioned shadow mask for a color cathode ray tube (CRT) adopting the same. In the color CRT including a faceplate on an inner side, a phosphor screen, a tensioned mask, and frame assembly secured to the faceplate, a funnel connected to the faceplate, the funnel having a neck portion and a cone portion, an electron gun in the neck portion of the funnel, and a deflection yoke on the cone portion of the funnel, the tensioned mask including a series of parallel strips separated by slits at an interval, tie bars interconnecting adjacent strips and defining slits at intervals, and dummy bridges disposed between adjacent tie bars, the dummy bridges respectively extending from adjacent strips toward each other in respective slits but not interconnecting the adjacent strips.Type: GrantFiled: December 17, 1999Date of Patent: August 20, 2002Assignee: Samsung SDI Co., LTDInventors: Wan Kim, Soon-chul Shin, Gwang-soo Kang
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Patent number: 6433467Abstract: A shadow mask for a cathode ray tube having a faceplate panel with an inner phosphor screen includes a front surface and a side wall. The front surface is formed with a beam-guide portion having a plurality of apertures, and a non-opening portion surrounding the beam-guide portion. The side wall is bent from the non-opening portion at an angle, and fixed to the panel via a mask frame. The front surface of the shadow mask has a predetermined waved pattern in at least one direction.Type: GrantFiled: February 3, 2000Date of Patent: August 13, 2002Assignee: Samsung SDI Co., Ltd.Inventors: Kwang-Sik Lee, Do-Hun Phun, Dong-Hwan Kim, Tae-Hoon Kweon, Jung-Soo Chang
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Patent number: 6432592Abstract: A shadow mask for a color CRT includes an effective face having a plurality of electron beam through holes and having a predetermined curvature; and a skirt unit extendedly bent at an outer portion of the effective face at a predetermined angle in the axial direction of the CRT, so as to be combined to a frame, wherein the skirt unit of the shadow mask has a plurality of vertical beads in parallel to the axial direction of the CRT and at least one horizontal bead formed crosswise in the lengthwise direction almost perpendicular to the vertical bead. With this structure, the strength property of the skirt unit of the shadow mask is improved to thereby minimize the widening degree of the skirt occurring in mounting the mask. Also, the curvature deformation such as mask sinking is prevented, thereby improving the quality of the color CRT.Type: GrantFiled: April 21, 2000Date of Patent: August 13, 2002Assignee: LG Electronics Inc.Inventor: Seung Tae Ryu
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Publication number: 20020105256Abstract: A color selection apparatus for a cathode ray tube, having a frame formed with a pair of supporting members arranged facing each other at a predetermined distance therebetween and a pair of elastic members coupled to the supporting members; and a mask formed with a plurality of slits for passing electron beams and fixed to the supporting members under tension. Each of the elastic members is formed with a pair of opposite parts facing each other in parallel at a predetermined distance therebetween, and a connection part perpendicularly arranged between the opposite parts. The opposite parts are preferably opposite each other in a direction where the electron beams advance (z-axis direction of the cathode ray tube). Alternatively, the opposite parts are opposite each other in a major direction of the mask (x-axis direction of the cathode ray tube).Type: ApplicationFiled: November 15, 2001Publication date: August 8, 2002Inventors: Dong Hwan Kim, Joon Suk Park
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Publication number: 20020101148Abstract: Disclosed is a CRT(Cathode Ray Tube), in which lengths of vertical axes(Y-axes) of outermost row slots of a long side of a shadow mask, slots adjacent to the outermost row slots in a central direction of the shadow mask and slots adjacent to the adjacent slots in a central direction of the shadow mask are maintained in the range of 70%˜110% of a length of a vertical axis (Y-axis) of a perfect slot, thereby providing a visually stable screen.Type: ApplicationFiled: August 13, 2001Publication date: August 1, 2002Inventor: Min-Ho Lim
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Publication number: 20020101149Abstract: A color picture tube has a tensioned mask supported by a support frame mounted within said tube. The mask has a significantly lower coefficient of thermal expansion than the frame. Intermediary members are located between the mask and the frame. The intermediary members are of a material having a coefficient of thermal expansion similar to that of the mask. Each of the intermediate members is attached to the frame by a plurality of connectors. Each of the connectors is elongated, and each of the connectors is attached at one end thereof to one of intermediate members and attached at an opposite end to said frame.Type: ApplicationFiled: January 22, 2001Publication date: August 1, 2002Inventors: Joseph Arthur Reed, Gary Lee Diven
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Patent number: 6420054Abstract: Masking device for a color cathode-ray display tube with a flat scree, of the type comprising a support frame for a tensioned shadowmask and a tensioned shadowmask mounted on the support frame so as to undergo tensioning at room temperature, in which device the support frame is made of a hardened Fe—Ni alloy having a thermal expansion coefficient between 20° and 150° C. of less than 5×1031 6 K−1 and a yield stress Rp0.2 at 20° C. of greater than 700 MPa, and the tensioned shadowmask is made of a hardened FeNi or Fe—Ni alloy having a thermal expansion coefficient between 20° C. and 150° C. of less than 5×10−6 K−1.Type: GrantFiled: June 22, 2000Date of Patent: July 16, 2002Assignee: Imphy Ugine PrecisionInventors: Ricardo Cozar, Pierre-Louis Reydet, Jean-Pierre Reyal
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Patent number: 6420823Abstract: In a shadow mask structure, by making the radii of curvature at the center and peripheral parts of a shadow mask different, even if the temperature of the shadow mask structure rises during use in a color CRT, there is extremely small deformation of the shadow mask and small landing error, so that there is no problem with loss of color purity attributed caused thereby.Type: GrantFiled: August 2, 2000Date of Patent: July 16, 2002Assignee: NEC CorporationInventor: Yoshito Tanaka
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Patent number: 6417608Abstract: A shadow mask/frame assembly for a color CRT includes a shadow mask including a hole portion having a predetermined curvature where a plurality of electron beam passing holes are formed and a bending portion extending from the edge of the hole portion by being bent at a predetermined angle, and a frame including a skirt portion coupled to the bending portion of the shadow mask, a flange portion extending from the skirt portion by being bent at a right angle thereto, a connection portion extending downward from the flange portion, and an extension portion extending from the connection portion, parallel to the flange portion.Type: GrantFiled: May 30, 2000Date of Patent: July 9, 2002Assignee: Samsung SDI Co., Ltd.Inventors: Dai-ok Choi, Dong-hwan Kim, Young-kook Park, Jae-ho Jeong, Myung-sup Seo
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Patent number: 6417609Abstract: Locking structure for picture tube and front frame body. Multiple fixing posts are formed on inner side of the front frame body and multiple fixing plates project from outer periphery of the picture tube corresponding to the fixing posts which retain the fixing plates. The front frame body is formed with a central window. When the bottom faces of the respective fixing plates of the picture tube are correspondingly planely rested on the fixing posts of the front frame body, the end edge of the flange of the window of the front frame body is snugly sealedly attached to the periphery of the picture tube. When screws are respectively screwed to forcedly lock the fixing plates of the picture tube on the corresponding fixing posts of the front frame body, the fixing plates are slightly downward inlaid into the top ends of the fixing posts so as to prevent the picture tube from being displaced or slided.Type: GrantFiled: September 5, 2000Date of Patent: July 9, 2002Inventor: Kuo-Cheng Huang
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Publication number: 20020084738Abstract: A shadow mask includes a substantially rectangular effective region formed having a number of electron beam passage apertures and opposed to a phosphor screen and a substantially rectangular skirt portion provided around the effective region and extending in the direction of a tube axis. The skirt portion has a pair of long sides extending substantially parallel to a major axis and a pair of short sides extending substantially parallel to a minor axis, the long and short sides being welded to the inner surface of a substantially rectangular mask frame. A distance a from an extending end of the skirt portion on each long side to the weld spot is longer than a distance b from an extending end of the skirt portion on each short side to the weld spot.Type: ApplicationFiled: December 26, 2001Publication date: July 4, 2002Inventors: Takeshi Nakayama, Shinichiro Nakagawa, Takashi Murai, Masatsugu Inoue
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Publication number: 20020079808Abstract: A method and apparatus of maintaining spacing between tension focus mask strands in a tension focus mask. The method includes providing a tension focus mask comprising busbars with crosswires connected therebetween. A permanent adhesive is applied to the screen-side of the mask strands. Next, novel non-permanent horizontal guide members are attached to the gun-side of the mask strands, where an adhesive is applied to the guide member before the guide members are applied to the mask. The guide members maintain the vertical mask strand spacing during: (1) the application of the horizontal crosswires to the screen-side of the mask and (2) the subsequent thermal processing. The thermal processing cures the adhesive on the screen-side of the mask, thereby: (1) permanently attaching the crosswires to the mask strands and (2) volatilizing the adhesive on the gun-side of the mask strands such that the non-permanent guide member detach from the mask strands.Type: ApplicationFiled: December 21, 2000Publication date: June 27, 2002Inventors: Richard LaPeruta, Edward Richard Garrity, Donald Walter Bartch, James Francis Edwards
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Publication number: 20020079813Abstract: An apparatus and method for retaining a damper wire used in a cathode ray tube to reduce vibration in the grill type mask assembly of a cathode ray tube. The damper wire is retained across a grill type mask by a bimetal damper spring having a first end and an opposing second end. The second end is coupled to the frame of the grill type mask assembly. A tab located proximate the first end of the damper spring is adapted to accept the damper wire that traverses the mask.Type: ApplicationFiled: December 22, 2000Publication date: June 27, 2002Inventors: Gary Lee Diven, Joseph Arthur Reed
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Publication number: 20020079812Abstract: An apparatus and method for terminating crosswires on a tension focus mask. The apparatus includes a set of base segment side rails each having a length and two respective ends. A pair of square tubes attached perpendicular to the respective ends of said base segment side rails to substantially form a rectangle. Also included are a pair of massive side rails having a length and two respective ends mounted above said base segments perpendicularly to said square tubes on each of the side rapid. Beam shield is offered to the massive side rail and insulating members are sandwiched between the side rail and a bus bar. Finally, a tension mask is attached and crosswires are laid and affixed to the bus bar.Type: ApplicationFiled: December 22, 2000Publication date: June 27, 2002Inventors: James Edward Doty, Joey John Michalchuk, Richard William Nosker
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Publication number: 20020079810Abstract: A method and apparatus for improving magnetic shielding in mask-frame-assemblies. The system includes providing a cathode ray tube, a mask frame assembly disposed within the cathode ray tube and at least one magnetic shield disposed on the edge of the mask frame assembly. These magnetic shields provide shielding for the horizontal component of the terrestrial magnetic field and thus reduces distortion in the picture displayed on the tube.Type: ApplicationFiled: December 22, 2000Publication date: June 27, 2002Inventors: Cesare De Paolis, Goffredo Antonelli, Giuseppe Giannantonio, Paolo Ginesti
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Publication number: 20020079811Abstract: A color cathode-ray tube (CRT) has an evacuated envelope with an electron gun therein for generating an electron beam. 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 slightly conductive 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 strands and are bonded thereto by the slightly conductive insulating material layer.Type: ApplicationFiled: December 22, 2000Publication date: June 27, 2002Inventors: Barry Jay Thaler, Philip Michael Heyman, Robert Leon Quinn, Richard Joseph Quinn, Liyou Yang
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Publication number: 20020079814Abstract: A color selection apparatus for a cathode ray tube includes an iron mask having a longitudinal axis and a short axis and a frame coupled with the mask and tensing the mask in one direction of the longitudinal and short axes.Type: ApplicationFiled: August 29, 2001Publication date: June 27, 2002Applicant: Samsung SDI Co., Ltd.Inventors: Kuen-Dong Ha, Kwang-Sik Lee, Arimoto Nozomu, Duk-Hyun Choe, Hoo-Deuk Kim, Gui-Bae Kim, Woo-Il Park
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Publication number: 20020079809Abstract: An apparatus for maintaining tension in a mask frame of a cathode ray tube. The apparatus includes affixing a shadow mask to a pair of triboxes disposed along opposite sides of a mask frame at a predetermined tension. The triboxes are coupled to the mask frame by braces having a different coefficient of thermal expansion than the triboxes so as to compensate for the expansion of the frame during thermal cycling of the cathode ray tube. Consequently, it is possible to maintain the tension force applied to the shadow mask by the mask frame.Type: ApplicationFiled: December 21, 2000Publication date: June 27, 2002Inventors: Gary Lee Diven, Joseph Arthur Reed
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Patent number: 6411024Abstract: A color picture tube for which a light-weight support frame for holding a shadow mask can be used and whose weight can be reduced, and a color picture tube that can be provided without requiring the use of a press mold, and a press machine for producing a shadow mask. The tension applied to the shadow mask is 5-90% of the tension (full tension) that would be applied to the shadow mask to prevent electron beams from arriving at a position that is shifted from a predetermined arrival position on the phosphor screen surface due to the thermal expansion of the shadow mask caused by absorbing thermal energy that is converted from the energy of electron beams when electron beams strike the shadow mask.Type: GrantFiled: February 16, 1999Date of Patent: June 25, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventor: Nozomu Arimoto
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Patent number: 6407488Abstract: A color picture tube having a tension mask attached to a support frame, wherein the mask if made from a material having a significantly lower coefficient of thermal expansion than the coefficient of thermal expansion of the material of the frame. The frame tensions the mask to have a fundamental resonant frequency of 90 Hz±20 Hz.Type: GrantFiled: April 1, 1999Date of Patent: June 18, 2002Assignee: Thomson Licensing S.A.Inventor: Frank Rowland Ragland, Jr.
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Publication number: 20020070655Abstract: A color picture tube for which a light-weight support frame for holding a shadow mask can be used and whose weight can be reduced and a color picture tube that can be provided without requiring the use of a press mold and a press machine for producing a shadow mask. The applied to the shadow mask is 5-90% of the tension (full tension) in which an actual arrival position of electron beams is not shifted from a predetermined arrival position on the phosphor screen surface due to the thermal expansion of the shadow mask caused by absorbing thermal energy that is converted from the energy of electron beams when electron beams strike the shadow mask.Type: ApplicationFiled: February 16, 1999Publication date: June 13, 2002Inventor: NOZOMU ARIMOTO
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Publication number: 20020070656Abstract: A tension mask assembly for a color cathode-ray tube includes a tension mask including a plurality of strips separated a predetermined distance from each other to form slots, a plurality of bridges connecting the strips to section the slots, and a plurality of holes formed in each of short side portions of the tension mask, a frame including first and second support members supporting both long side portions of the tension mask to apply a tension force to the strips of the tension mask, and at least a pair of elastic members supporting the first and second support members, and a plurality of vibration attenuation units coupled to the holes formed at both short side portions of the tension mask to attenuate vibrations of the tension mask.Type: ApplicationFiled: September 26, 2001Publication date: June 13, 2002Inventors: Dong-Hwan Kim, Woo-Il Park
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Publication number: 20020063507Abstract: A tension mask frame assembly for a color cathode-ray tube, including a tension mask, a frame and a vibration prevention unit, is provided. In this tension mask frame assembly, the tension mask has a slotted portion in which a plurality of electron beam passing holes are formed and a non-slotted portion located on the edge of the slotted portion. The frame supports two facing sides of the tension mask to apply a tensile force to the tension mask. The vibration prevention unit includes a damper having first and second attenuation portions that are maintained at a predetermined angle to form an insertion portion into which the edges of the tension mask not supported by the frame are inserted, and a support member for suspending the damper from the edges of the tension mask by passing through the first and second attenuation portions and the edges of the tension mask inserted into the insertion portion formed by the first and second attenuation portions.Type: ApplicationFiled: August 9, 2001Publication date: May 30, 2002Inventors: Soon-Cheol Shin, Sang-Shin Choi, Woo-Il Park, Il-Hwan Jang, Eung-Suk Lee
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Patent number: 6396203Abstract: A color shadow mask assembly includes a shadow mask spaced apart from an inner surface of a face panel by a predetermined gap and having a curved surface, and a rectangular frame for supporting and fixing the shadow mask. The shadow mask and the frame are integrally formed by welding to fix a side wall of the frame to a skirt of the face panel. The skirt alternately overlaps inner and outer surfaces of the side wall of the frame at opposite surfaces between the skirt of the shadow mask and the side wall of the frame.Type: GrantFiled: July 16, 1998Date of Patent: May 28, 2002Assignee: NEC CorporationInventors: Nobumitsu Aibara, Akira Shishido, Takashi Magoi, Tadayuki Nishimura