42.2: An Electron Gun for 76cm 120‐degree 16:9 Color TV Tubes

Wada, Yasufumi; Daimon, T.

doi:10.1889/1.1831754

Cited by 3 publications

(1 citation statement)

References 2 publications

(6 reference statements)

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“…The horizontally enlarged spot degrades horizontal resolution while the vertically compressed spot causes scanning moire. In order to overcome these problems, some technologies [3][4][5] and computer-aided simulation techniques 6,7 have been developed. Computer-aided numerical simulation is useful and convenient to predict the spot shape on the screen by taking various design parameters into account.…”

Section: Introductionmentioning

confidence: 99%

A study on spot distortion for an in‐line self‐converging system for color CRTs

Wada

2008

J Soc Info Display

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The spot distortion at the screen periphery of an in-line self-converging CRT is formulated by considering four factors; (a) oblique incidence of the beam at the screen periphery, (b) increased path length of the beam, (c) beam compression due to the deflection, and (d) the astigmatism due to the deflection field. The analytic spot size calculated with the formulas agrees well with measurement, though the effects of a particular gun system, spherical aberration, and space-charge repulsion are not taken into consideration in the formulas while assuming an ideal deflection field. The analytic formulas enable easy evaluation of spot distortion at the screen periphery because they give an intuitive understanding of beam behavior in the in-line self-converging system. In addition to the derivation of the formulas, "transposed scanning" is analyzed with the use of the formulas for one of the ways to optimize the spot distortion at the screen periphery.

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