| 摘要 |
PURPOSE:To adjust the white chromaticity point at an optional desired level and to absorb the variance between devices by providing a circuit consisting of an amplitude adjusting circuit, a phase adjusting circuit and an adder in order to adjust the phase and the amplitude at a proper level respectively. CONSTITUTION:When the white color is reproduced on the surface of an tube 1, the amplitude is set at zero for the carrier chrominance signal impressed to a terminal 8. Thus no signal emerges at the output terminal of a multiplier 9. However a fixed frequency coincident with the triplet frequency is obtained at the output terminal of a phase adjusting circuit 14. therefore a certain hue is reproduced on the surface of the tube 1 despite reception of a white signal by adding 15 the output signal of the circuit 14 to the output signal of an adder 12 to drive the tube 1. Furthermore the reproduced hue can be selected at an optional chromaticity point by adjusting an amplitude adjusting circuit 13 and the circuit 14. |
