摘要:
A PROCESS OF FORMING A CATHODOLUMINESCENT SCREEN OF A CATHODE RAY TUBE WHEREIN THE CHARACTERISTICS OF THE PHOSPHOR MATERIAL, I.E., PARTICLE DENSITY, BULK DENSITY, ATOMIC WEIGHT, ATOMIC NUMBER AND AVERAGE PARTICLE SIZE ARE RELATED IN A MANNER TO PROVIDE A SCREEN HAVING A PRESCRIBED PHOSPHOR WEIGHT AND THICKNESS TO EFFECT EFFICIENT UTILIZATION OF THE LUMINESCENT BRIGHTNESS OF THE RESPECTIVE PHOSPHOR MATERIAL WHEN EXCITED BY SUBSEQUENT ELECTRON BEAM IMPINGEMENT.
摘要:
A cathode ray tube comprising an electron gun for producing a plurality of beams located in a flat plane passing through the axis of the electron gun. The electron gun system comprises at least two cylindrical electrodes arranged in consecutive order and surrounding the beams. The ends of the two electrodes confronting each other are shaped to provide an aberration reducing electrostatic field for those electron beams that do not coincide with the axes of the two electrodes.
摘要:
An improved process for aluminizing the screen of a cathode ray tube wherein rapid and uniform dampening of the applied phosphor screen is accomplished prior to lacquering by rinsing with an aqueous solution of an organic solvent wherein the solvent content ranges substantially from one to twenty percent by volume. The solvent is at least one selected alcohol or ketone being a 1, 2, 3, 4 or 5 carbon chain compound having one functional radical group with a melting point below -11* centigrade and a molecular weight ranging between 32.0 and 89.0. After rinsing, a lacquer film is applied over the screen upon which a thin aluminum film is disposed. Subsequent baking removes the lacquer material from the screen.
摘要:
In a cathode ray tube comprising beam producing means to direct a plurality of electron beams from spaced apart locations to impinge on an electron receiving screen, the beams are focused on the screen by a main focusing lens which is common to all of the beams and has an optical center, and an auxiliary lens disposed between the beam producing means and the main focusing lens and having all of the beams passing therethrough with at least two of the beams being at different distances from the optical axis of the auxiliary lens, such auxiliary lens is operative to cause the beams to intersect at the optical center of the main focusing lens and has pre-focusing effects on the beams which are different at least with respect to the said two beams, and an additional focusing lens means is disposed between the main focusing lens and the screen and acts on less than all of the beams to correct for the different pre-focusing effects and thereby cause all of the beams to be focused precisely at the screen.
摘要:
Parallax barrier supporting means comprising substantially flat, rectangular bimetallic elements are disclosed. The elements are attached to the upper portion of the barrier frame and have depending springs attached thereto. The springs have apertures formed therein to mate with studs formed on the tube envelope inner wall.
摘要:
A cathode-ray tube for displaying colored images comprises an in-line three-element gun and a shadow mask. The shadow mask has formed therein a plurality of rectangular holes arranged in an orderly manner in rows and columns. The dimensions and spacing of the rectangular holes is selected to provide for optimum transmission of the electron beams to the screen, while still providing mechanical strength for the shadow mask.
摘要:
A gun structure for a picture tube of the single-gun, plural beam type is provided with a common voltage supplying terminal attached to the funnel portion of the tube and through which both an anode voltage and a convergence voltage are supplied to the tube.
摘要:
In order to check displacement of a shadow mask in a plane at right-angles to the axis of a cathode-ray tube, it is suspended from three flat springs consisting of two strips which are welded together along their narrow sides and constitute a bimetal; the coefficient of expansion of said springs is adapted to the location of the springs on the shadow mask edge by the location of the supporting point of the spring to the envelope, on a line at right-angles to the welding seam at different distances from the welding seam.
摘要:
In a cathode-ray tube in which a plurality of electron beams are focused on a screen by a focusing lens from which at least certain of the beams emerge along paths divergent with respect to the tube axis, and each of the beams emerging along a divergent path is deflected to cause convergence of the beams at a common area of the screen; such deflection of each diverging beam is effected by a pair of plates at different electrical potentials disposed at opposite sides of the respective divergent path and an auxiliary electrode having open areas therein disposed along the outer side of the respective divergent path spaced inwardly from the plate which is at the side of the respective divergent path away from which the beam is deflected, this plate being at a relatively low potential and the auxiliary electrode and the other plate being at substantially the same relatively high potential to establish an electric field between the plates which, in the region thereof located between the other plate and the auxiliary electrode and being traversed by the respective beam, has a potential gradient that is maintained substantially constant irrespective of variations in the relatively high potential to avoid misconvergence due to such variations.
摘要:
The invention relates to novel cathode-ray/vacuum tubes for color television. It was found that the present color television tubes emit considerable amount of X-radiation. The novel tubes described below are characterized by the X-ray absorbing faceplate which prevents the escape of such X-radiation or at least reduces the amount of said escaping X-radiation to the level which is safe for the public. These tubes have a construction in which their light transparent endwall on which the fluorescent screen is mounted has the X-ray absorbing power to accomplish this objective, which means to reduce the transmission of X-ray through said endwall to the amount smaller than 0.04 mr./hr. in addition the faceplate of said tubes is provided with a light partially absorbing material which means light filtering material to improve the contrast of images produced by said tubes.