Patent ID: 6903502

Claim:
An inner shield for color cathode ray tube, composed of two long side parts facing each other and two short side parts facing each other, which form a small opening part at an electron gun's side and a large opening part at a panel's side, comprising: a plurality of first recessed parts recessed for a given depth at one or more slopes from each of diagonal points of said long side parts at a small opening part's side towards a large opening part's side of said long side parts; and a plurality of second recessed parts recessed for a given depth in a round shape in connection with said first recessed parts, wherein said slopes are corresponding to the ratio of a length of said first recessed parts in the direction of center axis of said long side parts to a length of said first recessed parts at the right angle to center axis of said long side parts, and wherein an absolute value of said slopes become smaller as said first recessed parts become far from said small opening part's side of said long side parts and close to said large opening part's side of said long side parts.