| 单词 | shadow mask |
| 释义 | > as lemmasshadow mask shadow mask n. Television a perforated metal screen situated directly behind the phosphor screen in certain types of colour television tube, and having a pattern of precisely located holes through which the electron beams pass so as to strike the correct dots on the phosphor screen; frequently attributive, as shadow-mask tube. ΘΚΠ society > communication > broadcasting > television > transmitting or receiving apparatus > [noun] > television set > part of specific type of set shadow mask1951 1951 Proc. IRE 39 1187/1 The first public demonstration of..shadow-mask color tubes..was made in March, 1950. 1951 Proc. IRE 39 1188/2 The triangular pattern [of holes] was chosen for the shadow mask in experimental tubes primarily because of its mechanical properties. 1965 Wireless World July 354/2 The Mullard colour-selection shadow mask with graded holes. 1975 K. Wicks Television 54 The most common type of picture tube in use today is the shadow~mask tube. < as lemmas |
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