Patent
Electron gun assembly for color cathode ray tube apparatus
TLDR
In this article, a focusing voltage which is varied depending on an deflection of the electron beam is applied to the focusing electrode and an accelerating voltage is applied on the accelerating electrode, and the lens powers of the convergent and divergent lenses are varied in accordance with the adjustment of the variable resistor.Abstract:
In an electron gun assembly, three electron beams emitted from cathodes are passed through an electrode arrangement in which two intermediate electrodes are arranged between focusing are accelerating electrodes. A focusing voltage which is varied depending on an deflection of the electron beam is applied to the focusing electrode and an accelerating voltage is applied to the accelerating electrode. A resistor is connected between the accelerating electrode and the earth through a variable resistor and intermediate points of the resistor are connected to the intermediate electrodes. Thus, convergent and divergent lenses are formed between the focusing electrode and the intermediate electrode and between the accelerating electrode and the intermediate electrode. The lens powers of the convergent and divergent lenses are varied in accordance with the adjustment of the variable resistor.read more
Citations
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Patent
Color cathode ray tube apparatus
TL;DR: In this article, a color cathode ray tube with an electron gun and a disk-like intermediate electrode is presented, and Voltages are applied to the disk and intermediate electrodes such that they form an electron lens similar to that formed when the intermediate electrode does not exist.
Patent
Color picture tube
TL;DR: In this paper, a curve formed by an inner surface of a face panel in a cross-section including a tube axis of a color picture tube is defined, and a minimum value of an angle formed by the tangent of the curve and the plane orthogonal to the tube axis between the inflection point and the circumferential edge of the effective display region is defined.
Patent
Color cathode ray tube
TL;DR: In this article, a color cathode-ray tube including a main lens section comprising an anode to which an anodes voltage is applied, and a focus electrode, which is obtained by superposing on a predetermined voltage a voltage that changes depending upon the deflecting amount of the electron beams.
Patent
Color CRT system and process with dynamic quadrupole lens structure
Hsing-Yao Chen,Richard M. Gorski +1 more
TL;DR: In this article, a color cathode ray tube (CRT) having a self-converging yoke for applying an asymmetric magnetic field in a synchronous manner to a plurality of inline electron beams for deflecting the electron beams across a phosphorescing screen in the CRT, wherein the magnetic field causes defocusing of and an astigmatism of the electron beam where incident upon the cathode screen in off-center regions of the screen.
Patent
Cathode-ray tube apparatus
Junichi Kimiya,Shunji Ookubo +1 more
TL;DR: In this article, an electric field expansion type main lens portion is constituted by including a focus electrode to which a focus voltage on a first level is applied, an anode electrode with a second level higher than the first level and two auxiliary electrodes arranged between the focus and the anode.
References
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Patent
Electron gun having an extended field electrostatic focus lens
TL;DR: In this paper, a general purpose electron gun is depicted for receiving supply voltages from the power supply to produce a sharply focused beam of electrons at the cathode ray tube screen.
Patent
Color cathode ray tube apparatus
TL;DR: In this article, the focusing grid of the quadrupole electric field (8) which comprises the horizontal-electric-field boosting grids (11) and (11') and the vertical-electric field boosting grids(12) and(12') is disposed between the first focusing grid (7) and the second focusing grid(9).
Patent
Deflection device for use with in-line type color cathode ray tubes
TL;DR: In this paper, a deflection yoke for use with an in-line color cathode ray tube is presented. But the use of the deflection Yoke with an electron beam is restricted to the case where the electron beam converges on a screen at the front of the tube.
Patent
Regulation of the scan width of a raster scanned CRT deflection system
TL;DR: In this article, the input voltage to the deflection system of a raster scanned CRT is made variable and is controlled by a feedback network in such a way that the width of the raster remains constant regardless of scanning frequency variations.
Patent
Deflection yoke for use with in-line cathode ray tubes
TL;DR: A deflection yoke for use with an in-line cathode ray tube in which a plurality of electron beams are laid, for example, in a horizontal plane, which has a horizontal deflection winding formed in the saddle shape with front and rear bends for producing a pincushion type magnetic field, and a vertical deflection wound wound toroidally around a magnetic core to surround the horizontaldeflection winding between the front and reverse bends as mentioned in this paper.