| 摘要 |
PURPOSE:To make it possible not to make a display color change when adjusting in a broad band, by connecting the constant voltage power source and the variable voltage power source across the fixed terminals of a variable resistor of each DC regeneration circuit and to one terminal of the above resistor. CONSTITUTION:Each primary color signal is applied to capacitors 11, 11, 11 through the primary color signal amplifiers 9R, 9G, 9B, and is provided to each cathode of a color CRT having 3 electronic guns through DC regeneration devices 10R, 10G, 10B. In this case, the DC regeneration devices 10R, 10G, 10B are equipped with variable resistors 14, 14, 14 separately generate a DC component of each primary color signal, and it is possible not to make a display color change when adjusting luminance in a broad band, by connecting the constant-voltage power source 18 and the variable voltage power source 19 across the fixed terminals of this resistor 14 and to one terminal of this resistor 14, respectively. |
