Ray Montie - An Overview
これ以外の様々な業界でもご協力をさせて頂いております。 夢テクノロジーが提供するUS 5405722A, "Method for mixed baking-out and sealing of an electrophotographically processed display assembly for any cathode-ray tube" ^
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US 7138755B2, "Colour photograph tube apparatus owning beam velocity modulation coils overlapping with convergence and purity unit and ring formed ferrite Main" ^
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The funnel is coated on the inside and out of doors using a conductive coating,[209][210] generating the funnel a capacitor, assisting stabilize and filter the anode voltage from the CRT, and drastically lowering the period of time necessary to turn on a CRT. The soundness provided by the coating solved difficulties inherent to early electric power provide designs, because they utilized vacuum tubes. Since the funnel is employed as a capacitor, the glass used in the funnel needs to be an excellent electrical insulator (dielectric). The internal coating contains a beneficial voltage (the anode voltage that could be various kV) although the outer coating is linked to ground.
The deflection coils are driven by sawtooth signals[324][325][295] that may be shipped through VGA as horizontal and vertical sync indicators.[326] A CRT demands two deflection circuits: a horizontal along with a vertical circuit, which happen to be similar apart from the horizontal circuit runs at a Significantly larger frequency (a Horizontal scan level) of fifteen to 240 kHz depending upon the refresh amount in the CRT and the volume of horizontal strains to get drawn (the vertical resolution of the CRT). The higher frequency makes it more vulnerable to interference, so an computerized frequency Command (AFC) circuit may very well be accustomed to lock the period of the horizontal deflection sign to that of the sync signal, to prevent the graphic from getting to be distorted diagonally.
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Some displays for early pcs (people who required to Show extra textual content than was realistic working with vectors, or that necessary substantial velocity for photographic output) applied Charactron CRTs. These include a perforated steel character mask (stencil), which shapes a wide electron beam to kind a personality within the display. The technique selects a personality about the mask making use of one list of deflection circuits, but that triggers the extruded beam for being aimed off-axis, so a 2nd set of deflection plates needs to re-intention the beam so it really is headed toward the middle of the screen.
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The display, funnel and neck are fused with each other into a single envelope, quite page possibly using direct enamel seals, a hole is designed inside the funnel onto which the anode navigate to this site cap is mounted and also the phosphor, aquadag and aluminum are utilized Later on.[64] Beforehand monochrome CRTs utilised ion traps that required magnets; the magnet was accustomed to deflect the electrons away from the more difficult to deflect ions, letting the electrons by whilst allowing the ions collide into a sheet of metallic In the electron gun.
Those who use magnetic deflection may perhaps make use of a yoke which has two pairs of deflection coils; a person pair for vertical, and another for horizontal deflection.[316] The yoke is often bonded (be integral) or detachable. Those that were bonded utilized glue[317] or even a plastic[318] to bond the yoke to the world between the neck and the funnel on the CRT though Individuals with removable yokes are clamped.[319][169] The yoke generates warmth whose elimination is essential For the reason that conductivity of glass goes up with growing temperature, the glass should be insulating for that CRT to remain usable as a capacitor.
Dynamic color convergence and purity are one of many most important main reasons why until late of their heritage, CRTs have been extensive-necked (deep) and experienced biaxially curved faces; these geometric style and design traits are essential for intrinsic passive dynamic color convergence and purity. Only starting off throughout the nineteen nineties did advanced active dynamic convergence payment circuits come to be available that made quick-necked and flat-confronted CRTs workable.
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