Flat tension mask having apertures with a constant vertical...

Details Flat tension mask having apertures with a constant vertical... Flat tension mask having apertures with a constant vertical...

H - Electricity

01

J

313/35.16

H01J 29/07 (2006.01) H01J 29/32 (2006.01)

Patent

CA 1274270

ABSTRACT OF THE DISCLOSURE A planar tension mask is disclosed for use in a color cathode ray tube having a substantially flat faceplate. The shadow mask according to the invention has an aperture pattern characterized by the vertical pitch of the aperture being constant, but with the horizontal pitch of the apertures increasing outwardly from the mask center according to a function which is parabolic with horizontal displacement, and parabolic with vertical displacement. The horizontal pitch increase is isotropic in the sense that the increase in pitch is the sum of the horizontal displacement increase and the vertical displacement increase. A color cathode ray tube front assembly having such a shadow mask is also disclosed.

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