摘要:
A method of manufacturing a phosphor screen of a cathode ray tube for reducing required manufacturing process operations and time in comparison with a well-known slurry process, and preventing generation of noise due to smear of index stripes in a beam index type cathode ray tube. The method includes forming black matrix layers on a panel, transferring G color layers to the panel by scanning laser beams to a first transfer film having the G color layers as a transfer layer, transferring B color layers to the panel by scanning laser beams to a second transfer film having the B color layer as a transfer layer, transferring R color layers to the panel by scanning laser beams to a third transfer film having the G color layer as a transfer layer, forming an organic layer and an aluminum reflection layer on the whole surface of the panel, and removing the organic material by carrying out a baking process with relation to the panel.
摘要:
A screen for a beam index tube includes a fluorescent surface having a pattern of color stripes respectively producing red, green, and blue light in unit areas within the stripes in response to an incident electron beam and index unit areas regularly arranged in the pattern, the color stripes being arranged side-by-side and along a vertical direction with color unit areas of vertical stripes being in registration along a horizontal direction, each color unit area being spaced in the horizontal and vertical directions from the nearest color unit area by one unit area, and the index unit areas being disposed among the color unit areas and spaced from the nearest index unit area by three unit areas in the horizontal direction and one unit area in the vertical direction. A beam index tube may include the screen in combination with a tube assembly and an electron gun. Since the index unit areas are not spaced from nearest color unit areas, vertical deflection correction of the electron beam is not required and can be omitted. Thus, the picture quality produced is not adversely affected by the earth's magnetic field and manufacturing costs are reduced by avoiding the elements needed for the vertical deflection correction.
摘要:
A color reference CRT of the type employing a screen of a pattern of individual phosphor elements of different color components, is produced by adjusting the screen weights of the different color components to achieve the desired reference color when the screen is scanned by an electron beam of predetermined beam current and anode potential.
摘要:
A multiple color imaging device such as a beam index CRT (FIG. 3a/b), with red, green and blue phosphor stripes arranged in triplets each defining one color image pixel in the line scan direction having at least the red and green phosphor stripes coated with an electrically insulating barrier layer 38 on which is formed a thin layer 39 of blue emitting phosphor. In color display mode the beam energy is sufficient to penetrate the barrier layer and excite the principal stripe phosphor to give the desired color emission but also excites the blue phosphor, blue emissions being perceived at lower luminance than the red and not detrimental to perceived color purity. In monochrome mode the beam energy is reduced to excite only the blue phosphor. As each stripe is able to emit blue when excited the image resolution for monochrome is increased from color triplet dimensions to individual stripe dimensions or better. The low level of blue emissions is suitable, and preferred, for night viewing of FLIR images, particularly with night vision goggles. Individual phosphor grains may be given a skin of the monochrome phosphor (FIG. 4) or it may be mixed with the principal phosphor without a barrier but with a red/green filter in front of the screen for monochrome operation (FIG. 2).
摘要:
An index type color picture tube having a stripe type fluorescent screen with strips of a zinc sulfide-based green color phosphor, a zinc sulfide-based blue color phosphor, a red color phosphor which is a mixture of a Y.sub.2 O.sub.2 S:Eu phosphor containing not more than 2 ppm of Tb and a Y.sub.2 O.sub.3 :Eu phosphor, or a Y.sub.2 O.sub.2 S:Eu phosphor containing 5 to 30 ppm of Tb, and a phosphor for index detection has a uniform current-brightness characteristic of tricolor phosphors, and a less variation in white color tone of the picture reproduced over a range of from low current to high current.
摘要翻译:一种索引型彩色显像管,具有带硫化锌系绿色荧光体,硫化锌系蓝色荧光体,红色荧光体的条状荧光屏,其为不含有Y2O2S:Eu荧光体的混合物 或比例为2ppm的Tb和Y 2 O 3:Eu荧光体,或含有5〜30ppm的Tb的Y 2 O 2 S:Eu荧光体,并且用于指示检测的荧光体具有三色荧光体的均匀的电流 - 亮度特性,并且白色变化较小 在低电流到高电流范围内再现图像的色调。
摘要:
A cathode ray tube gun structure for minor deflection of an electron beam and employing electrostatic beam deflecting electrodes ultimately controlled by a deflection signal at a low voltage level for minor deflection of the beam. The minor beam deflection electrodes may be positioned in the low beam potential focus region of the gun to provide for minor deflection of the beam. The electrodes may be enclosed in a cylindrical electrode, the latter being used for focusing the beam, or the cylindrical electrode may be omitted in which case focusing and deflection functions are provided by the minor beam deflection electrodes. The minor beam deflection electrodes may be positioned in a high beam potential region, in which case low voltage control is provided by capacitive coupling through the envelope of the tube. The deflection electrodes may also be employed as the conventional second grid structure in a cathode ray tube gun structure.A cathode ray tube gun structure having a grooved cathode surface in conjunction with grid structures containing rectangular apertures therein for the formation of a beam substantially rectangular in cross section having uniform beam density across the section.A screen for a cathode ray tube having a mosaic of elements, in which one or combinations of elements located between the glass face plate and a conventional backing layer are employed to enhance or inhibit secondary emission of electrons, as desired, for various regions of the mosaic.A screen for a cathode ray tube having a curvature defined by a radius R, the center of curvature of which is positioned at the center of magnetic deflection of the major beam deflection structure.
摘要:
Point light sources and elongated light sources are disclosed which comprise light pipes in the form of elongated and funnel shaped transparent scintillators. To increase the intensity of the light at the exit terminal of the light pipes, they have tapered sides where the thickness increases in the direction of the exit terminal. Application of these light sources to the photo-fabrication of line-screen and dot-screen cathode ray tubes is disclosed.
摘要:
An electron emission display including an electron emission substrate having at least one electron emission device formed thereon and an image forming substrate spaced apart from the electron emission substrate. The image forming substrate includes an effective region where electrons emitted from the electron emission device collide with the effective region to form images and a black region surrounding the effective region. The effective region includes a fluorescent layer formed in an arbitrary pattern and a metal layer formed on the fluorescent layer. The metal layer has a structure extending onto at least a portion of the black region.
摘要:
A single gun color cathode ray tube (CRT) having a screen consisting of alternating red, blue and green vertical phosphor strips in groups of three, with strips of conductive or photovoltaic material overlaying each phosphor strip, or placed between adjacent strips. The same color conductive strips are connected in parallel in three arrays, and connected to three individual trigger buses. The conductive lines are connected to a positive bias voltage such that when the electron beam within the CRT strikes a conductive strip, a pulse is generated and fed to the corresponding trigger bus. As the single electron beam scans the screen, trigger pulses are generated in the conductive strips and are fed to a trigger pulse amplifier and then to a multiplexer and used as control signals. The multiplexer in turn gates the color video signals from a remote source, such as a workstation or television set, such that the corresponding video signal for that color is modulating the beam as the electron beam strikes a phosphor strip corresponding to that color.