| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and an apparatus for controlling the voltage of an electron source having a matrix structure while adjusting an emission electric charge. SOLUTION: In the method for controlling the voltage of the electron source having the matrix structure, wherein the electron source is provided with rows and columns for addresses, the intersecting points define discharge regions referred to pixels, and the electron is given by the columns, first, an electron emission is generated by giving an electrical potential having an appropriate value enabling radiation to the selected row and the selected column, then, the value is maintained while emitting the electrical potential, the sampling of the emission current of each pixel and the analog recording of the related column are carried out at the time of start of radiative time, and other electric currents which are given by an electric current generator and are proportional to the values of measured emission currents circulating in the column are used. Secondly, the amount of electric charges distributed by each electric current generator to all or part of remaining row time is measured, and when the amount reaches a required value, the electrical potential of the column to be combined with the electric current generator is replaced by a value to reliably interrupt the electron emission from the pixels of the column. COPYRIGHT: (C)2003,JPO
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