Patent ID: 7148615

Claim:
A color cathode ray tube including a panel to display image, a neck where electron gun is housed and a funnel which connect the panel and the neck, an outer surface of the panel having a film is formed substantially flat, an inner surface of the panel having a phosphor layer has a curvature, and a wall thickness differs between a center portion and a peripheral portion of the panel, wherein the panel formed of a tinted glass, a peripheral transmissivity ratio which is a ratio of transmissivities of the peripheral portion and the central portion of the panel before the film is set to a value not greater than 60%, and body color of the panel is set such that L*=30 to 40, a*= − 8.5 to 1.5, b*= −b to 5 at the center portion, and L*=13.5 to 23.5, a*= − 7.5 to 2.5, b*= − 6.5 to 3.5 at the peripheral portion, where color difference Δa*b* is set at Δa*b*=<3, and the film formed on the outer surface of the panel is constituted of a wavelength selective absorption layer which is thick at the panel center portion and thin at the panel peripheral portion and an electrical conductive layer which is formed over the wavelength selective absorption layer, and the transmissivity ratio at the panel peripheral portion after the formation of the film is set to a value not less than 60% and the color difference is set to satisfy a following relationship the color difference Δa*b* after the formation of the film ≦ color difference Δa*b* before the formation of the film, where L* is luminance at L* a* b* colorimetric system of CIE 1976 L*a*b* colour space, a* and b* are psychometric chroma coordinates at L* a* b* colorimetric system of CIE 1976 L*a*b* colour space.