摘要:
A shadow mask includes a perforated region in which a plurality of electron beam passage apertures are formed, a non-perforated region on the periphery of the perforated region, and a skirt portion bent to an electron gun side with respect to the non-perforated region. The curved surfaces on an x-axis and a y-axis of the perforated region are convex to a panel side. The perforated region includes a curved surface that is convex to the panel side and a curved surface that is convex to the electron gun side on a periphery of the perforated region. Furthermore, the perforated region has a curved surface that is convex to the panel side and a curved surface that is convex to the electron gun side in a region surrounded by the periphery, the x-axis, and the y-axis. Because of this, the color displacement caused by doming can be reduced while a shadow mask is used which is made of an inexpensive iron material, and in which the increase in the difference in elevation in the z-axis direction between a center portion and a diagonal portion of the perforated region is suppressed.
摘要:
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.
摘要:
A color cathode ray tube comprises a panel which outside surface is flat and inside surface has curvature, and a pressed shadow mask having a curved surface opposed to the panel inside surface. The curved surface of the shadow mask is such that the radius of curvature decreases approximately linearly as the position moves from the center to the periphery. Radii of curvature on the major axis, minor axis, and diagonal axis at positions having the same distance from the shadow mask center do not have large differences. This configuration can increase the mechanical strength of the shadow mask.
摘要:
Color cathode ray tube including a panel having a substantially flat outside surface and an inside surface with a curvature, and a shadow mask at rear of the panel formed to have a curvature, wherein, when Rxp denotes a radius of curvature of the inside surface of the panel in a long axis direction, Ryp denotes a radius of curvature of the inside surface of the panel in a short axis direction, Rdm denotes a radius of curvature of the shadow mask in a diagonal axis direction, and nullWnull denotes a ratio of a thickness of an end portion of an effective surface of the panel to a thickness of a center portion of the panel, the radius Rxp of curvature of the inside surface of the panel in the long axis direction, and the radius Ryp of curvature of the inside surface of the panel in the short axis direction can be respectively expressed as follows; Rxpnull(AnullWnullB)nullRdm(Anullnull0.217, 1.607
摘要:
A shadow mask is arranged to face an inner surface of a substantially rectangular face panel. The shadow mask has a substantially rectangular mask body which has a number of apertures for passing an electron beam, and a rectangular mask frame which supports a peripheral edge portion of the mask body. The mask body is curved in a short axis direction, and is fixed to the mask frame in a state that an internal stress of a direction making small a radius of curvature of the short axis direction is applied. The shadow mask is manufactured in a manner that a rectangular flat mask is-plastically deformed so as to prepare the mask body having a curved surface such that a relation between a radius of curvature Rc of the short axis direction in the vicinity of the long axis and a radius of curvature Ra of the short axis direction in the vicinity of a long side becomes Rc
摘要:
A face panel (12) constituting a part of a vacuum envelope (20) has a substantially rectangular effective area (10), the inner surface of which is formed with a phosphor screen (14). The effective area has a long axis (X) extending in the horizontal direction and a short axis (Y) extending in the vertical direction. The outer surface of the effective area is cylindrically curved with an infinitely large radius of curvature along the long axis and a predetermined radius of curvature along the short axis. The vacuum envelope has arranged therein a shadow mask (15) in opposed relation to the phosphor screen. A mask body of the shadow mask has a substantially rectangular effective surface cylindrically curved with an infinitely large radius of curvature along the long axis and a predetermined radius of curvature along the short axis thereof. In manufacturing the shadow mask, a flat mask is subjected to a plastic deformation into a cylindrical shape curved along the short axis and then subjected to an elastic deformation in such a manner that the radius of curvature thereof is larger than at the time of plastic deformation. The mask body thus formed by elastic deformation is fixed to a rectangular frame.
摘要:
A striped-screen tension mask color CRT has a flat glass face with stripes of trios of colored-light-emitting phosphors deposited on its inner surface. An associated strip-type shadow mask has a predetermined downward curvature from center to sides effective to alleviate degrouping of electron beams when the tube is activated.
摘要:
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
摘要:
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%
摘要:
A cathode ray tube includes a front side glass panel, a fluorescent screen formed on an inside surface of the panel, a funnel connected to the panel, forming a vacuum tube, an electron gun embedded in the funnel, a deflection yoke for deflecting electron beams emitted from the electron gun in horizontal and vertical directions, and a shadow mask for discriminating the electron beams in colors, in which a diagonal curvature radius (Rd), thickness (t), and effective diagonal length (D) of the shadow mask satisfy a condition of 9 , 000 ≤ Rd × 391 mm D × t ≤ 10 , 000.