SCAN CONVERSION METHOD AND APPARATUS

摘要

PURPOSE: To achieve scanning conversion with the minimum hardware and processing time by addressing each pixel in an array with the minimum number of times and retaining peak data during current antenna scanning. CONSTITUTION: A scanning conversion device 26 corresponds to a display screen with pixels arranged in Cartesian coordinates and the pixel and some of them have a refresh storage that is constituted of a matrix consisting of storage locations that cannot be addressed by the converted Cartesian coordinates. First, each polar coordinate is converted to the corresponding Cartesian coordinates and R1 -θtable 29 with an address for storing a charge signal corresponding to the polar coordinate of data is addressed. Further, a storage location that cannot be addressed is accessed by the charge signal and charge data are stored at a storage location that is accessed by the charge signal.