Patent ID: 6657374
Filing Date: 2003-12-02
Classification: H01J

Abstract:
A cathode ray tube comprising:a panel having a face surface whose outer shape is a substantial rectangle and a skirt portion which extends substantially vertically from all areas of an outer peripheral portion of the face surface to the face surface; a funnel which has a funnel shape whose outer shape of a widest open portion of the funnel shape has a same outer shape as the skirt portion of the panel; and a sealing portion for connecting the panel and the funnel, wherein the funnel comprises a body portion having a sealing surface which is connected to the sealing portion, a yoke portion connected to the body portion, wherein a wall thickness of the yoke portion is substantially uniform, and a neck portion connected to the yoke portion, and wherein the cathode ray tube includes a portion whose thickness becomes (2.78+0.0038Ã—D)&lE;t1&lE;(3.7+0.0038Ã—D)(mm), where D is a diagonal axis length (mm) between rectangular corner portions of an effective screen of the panel, and t1 is a thickness (mm) at positions which occupy 75% of a length of the body portion extending from the sealing surface of the body portion to the yoke portion along a tube axis direction.