MALS(Multi Astigmatism Lens System)電子銃の開発(<論文小特集>ディスプレイ)

概要

論文の詳細を見る
A new electron gun with a multi astigmatism lens system (MALS) for 41 cm (17 inch) color display tubes has been developed that improves the uniformity of resolution over the entire screen. The features of this lens system are three static astigmatism lenses (G1,G2 and a main lens) and two dynamic astigmatism lenses (G3 and G5). At the screen comer, the static astigmatism lenses cancel the deflection defocusing. At the screen center, the dynamic astigmatism lenses cancel the effect of the above static astigmatism lenses. As a result, the vertical and horizontal ratio (Sv : Sh) of the spot size has been improved from 1 : 2 to 1 : 1.3,and the horizontal spot size has been improved by 25% at the screen corner. Moreover, by using an electric feature that makes the dynamic focus voltage and static focus voltage equal at the screen corner, scattering of the beam spot size at the screen corner was reduced.
社団法人映像情報メディア学会の論文
1997-07-20