Color cathode ray tube correcting beam landing errors

A cathode ray tube comprising:

• a panel on inner surface of which a phosphor screen is formed;
• a funnel joined to the panel;
• an electron gun generating electron beams;
• a shadow mask mounted to the panel, the shadow mask having a faceplate portion and a peripheral skirt portion bent back from said faceplate portion, said faceplate portion further comprising an apertured portion and a non-apertured portion surrounding said apertured portion;
• and
• a frame having a supporting portion joined to said skirt portion and a bottom portion bent inward from said supporting portion and extending by width Da from the short side of said supporting portion, wherein
• Da satisfies:
• Da<Ha×La/P+Na
• where La represents distance between center point Fx of said faceplate portion and a short side of said apertured portion;
• Na represents distance between the short side of said apertured portion and a short side of border of said faceplate portion from which said skirt portion is bent;
• P represents distance between the electron beams deflection center Dx and the center point Fx of said faceplate portion;
• Ha represents distance between the short side of the border of said faceplate portion and a short side of rear end line of said supporting portion from which said bottom portion is bent.