Videoanzeigegerät mit einer festen zweidimensionalen Matrix von Bildelementen

摘要

A video display apparatus includes an LCD device of the active matrix type and an image memory having an arrangement and storage capacity corresponding to the two-dimensional pixel arrangement thereof. A necessary processing such as conversion of the number of scanning lines, time-base companding in the horizontal direction and so on is applied to the inputted video signal according to the format thereof and then it is written into the two-dimensional arrangement of the image memory. The data written into the image memory is read out by a clock of a fixed frequency within a period shorter than the writing period asynchronously with the writing operation. Then, the LCD is driven by the read data and an image is displayed on the pixel arrangement.