Cathode-ray tube having improved 16 x 9 aspect ratio faceplate

Details Cathode-ray tube having improved 16 x 9 aspect ratio faceplate Cathode-ray tube having improved 16 x 9 aspect ratio faceplate

H - Electricity

01

J

313/35.34

H01J 29/10 (2006.01) H01J 29/86 (2006.01)

Patent

CA 2038211

The present invention provides an improvement in a cathode-ray tube that includes a rectangular faceplate having two long sides and two short sides wherein the ratio of the length of the long sides to the length of the short sides is approximately 16 to 9. The tube includes a major axis which parallels the two long sides and a minor axis which parallels the two short sides. The improvement comprises the ratio of the equivalent radius of the faceplate curvature along the major axis to the equivalent radius of the faceplate curvature along the minor axis being in the approximate range of 1.5 to 1.6, the ratio of the equivalent radius of the faceplate curvature along the long sides of the faceplate to the equivalent radius of faceplate curvature along the major axis being in the approximate range of 1.12 to 1.15, and the ratio of the equivalent radius of the faceplate curvature along the long sides of the faceplate to the equivalent radius of faceplate curvature along the short sides being in the approximate range of 1.30 to 1.36.

Cette invention concerne une amélioration d'un tube à rayons cathodiques dont la dalle rectangulaire présente un rapport de longueur des grands et petits côtés d'environ 16 à 9. Le tube a son grand axe parallèle à ses grands côtés et son petit axe parallèle à ses petits côtés. L'amélioration réside dans le rapport du rayon de courbure de la dalle le long de son grand axe à son rayon de courbure le long de son petit axe, qui se situe entre environ 1,5 et 1,6; dans le rapport de son rayon de courbure le long de ses grands côtés au rayon de courbure le long de son grand axe, qui se situe environ entre 1,12 et 1,15; et dans le rapport de son rayon de courbure le long de ses grands côtés à son rayon de courbure le long de ses petits côtés, qui se situe entre environ 1,30 et 1,36.

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