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I read that the 15GP22 blocked 86% of the electron energy by its shadow mask, hence the Chromatron and beam index development. I don’t think the color filters blocked that much light. If it’s true that the filters caused a 33% reduction in light, it’s still much better than the 86% light reduction.
The field sequential system could have been viable and had advantages. Simple tube, less parts, no convergence requirements, brighter images, higher resolution, no dot or stripe deposits required, no moire effects.
But the General and his suits made sure the competition would never prevail. Just litigate, litigate and litigate until they broke the will or the financial ability of the competition.
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