| 摘要 |
PURPOSE:To obtain a convergence-free color picture tube having excellent resolution on the entire part by improving shape of electron beam spot in the periphery of displayed picture through application of deflected field control element. CONSTITUTION:The electron beam releasing pores 5, 6, and 7 are arranged in line, and a pair of deflected field control elements 9a, 9b are provided to the center beam releasing pore 6, while a pair of deflected field control elements 8a, 8b and 10a, 10b are respectively provided to the beam releasing pores 5 and 7 in both sides. These deflected field control elements are arranged in both sides of the electron beam releasing pores in such a manner that the interval (Go) on the in-line arranging axis (X axis) or the line connecting the electron beam releasing pores in the interval opposing in the in-line arranging direction becomes maximum as compared with the interval at the other portion. The opposing area of field control element is formed in such a way as corresponding to the outline of circular electron beam releasing pores, namely to a circle. Therefore, in regard to the interval of the deflected field control elements opposing each other in both sides of the electron beam releasing pores, the minimum part is considered as (GE) while the maximum part as (GO). |
