Color television receiver of beam index type
专利汇可以提供Color television receiver of beam index type专利检索，专利查询，专利分析的服务。并且PURPOSE: To prevent the lowering in the contrast of picture, by obtaining the index signal representing the beam position on the fluorescent screen, without flowing always some beam current as the bias current.
CONSTITUTION: An arbitrary horizontal scanning period in one vertical scanning period is selected with the control signal production circuit 22, and a given voltage W(t) is fed to the cathode 6 through the control of the video signal selection switch 21. Thus, a given beam current flows to the cathode ray tube 1 and the index signal can be obtained as the output of the secondary electron flow level identifier 14. This index signal is written in the memory unit 23, and the content is read out every horizontal scanning in the one vertical scanning period after that. It is fed to the video signal selector switch 21 and correct color picture can be reproduced by sequentially selecting the video signals ER, EB, EG. The readout and write-in control for the memory unit 23 is made with the unit 22.
COPYRIGHT: (C)1980,JPO&Japio，下面是Color television receiver of beam index type专利的具体信息内容。
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