专利汇可以提供Beam index type color television receiver专利检索,专利查询,专利分析的服务。并且PURPOSE:To decrease cross modulation and to eliminate the need for a bias current, by using a switche a signal from two different index fluorescent substances from luminous specrum according to reproduced color. CONSTITUTION:An index type color cathode ray tube 7 has two types of index fluorescent substances (X,Y) different from luminous spectrum per three-color fluorescent substance. Luminance from the fluorescent bodies X and Y is photoelectric-converted at photoelectric coverting elements 11 and 12 via filters 9 and 10 and connected to a changeover switch 14 through a filter 13. The changeover switch 14 is switched with a switch control circuit 15 controlled with a phase detector 16 detecting the hue inputted from a color signal Ec(t) and a subcarrier wave ER(t). An index signal from a switch 14, after being shaped, processes the color signal Ec(t) at a color signal processing circuit 18, and a monochrome signal EM(t) is added at an addition circuit 19 and a color signal is applied to a cathode 8. Thus, an index type color picture tube with less cross modulation and not requiring bias current can be obtained.,下面是Beam index type color television receiver专利的具体信息内容。
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