发明授权
US4707633A Shadow mask for enhanced resolution and brightness in color cathode ray tubes 失效
阴影掩模,用于提高彩色阴极射线管的分辨率和亮度

Shadow mask for enhanced resolution and brightness in color cathode ray
tubes
摘要:
In construction of a shadow mask for color picture tubes, use of Invar for the shadow mask suppresses thermal deformation caused by electron beam impingement and provision of a four pole magnet frame surrounding each mask aperture causes increased convergence of electron beams, thereby enabling production of images with high resolution and brightness.
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