Image display apparatus using non-interlace scanning system.

摘要

A display apparatus such as a liquid crystal display apparatus capable of a superimposed display of one signal on the other of a plurality of signals on different scanning systems, such as a television signal and a character and graphic signal, without deteriorating the quality of image. When only a television signal is to be displayed, double line sequential scanning is performed with priority given to the resolution of the image. When a character and graphic signal is to be displayed as superimposed on the television signal, double line sequential non-interlace scanning is performed by force (with first priority given thereto) so that trouble of sticking of the character and graphic signal may be reduced. To achieve a display of a character and graphic signal superimposed on a television signal by adding the character and graphic signal to the television signal and displaying the mixed signal, the displaying system is switched to a non-interlace displaying system by force.