| 21. | GE's system improved on the RCA shadow mask by replacing the small round holes with slightly larger rectangles.
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| 22. | For this reason, Trinitron systems are easier to focus than shadow masks, and generally had a sharper image.
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| 23. | These stabilizing wires provide the easiest way to distinguish aperture grille and shadow mask displays at a glance.
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| 24. | The modern RGB shadow mask technology for color CRT displays was patented by Werner Flechsig in Germany in 1938.
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| 25. | "' Doming "'is a phenomenon found on some CRT televisions in which parts of the shadow mask become heated.
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| 26. | By the time the next set of presentations was ready, shadow mask tubes using one or three guns were available.
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| 27. | As a consumer system it was enormous, expensive, impractical, and dropped as soon as the shadow mask system was successful.
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| 28. | RCA had, by this time, produced experimental shadow mask sets that were an enormous leap in quality over any competitors.
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| 29. | Atari used the term " color quadrascan " to describe the shadow mask version when used in their video arcade games.
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| 30. | Their demonstration unit had eight more tubes than a similar shadow mask system, which at that time represented a significant cost.
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