Image display apparatuses having a delta arrangement type screen and image conversion methods for display

摘要

In order to reduce aliasing as much as possible in a display apparatus (100) that has a delta arrangement type screen (60), an image filter for performing a neighborhood operation is incorporated as a previous stage of a screen driving circuit (70). The image filter realizes low pass filtering including space frequency limitation in the diagonal direction that is suitable for a display on the delta arrangement type screen (60). Coefficients that constitute the filter matrix are optimised so that frequency components that exceed a Nyquist limit in the delta arrangement are suppressed. Coefficients that give optimal filter characteristics for any scale of filter matrix are defined by an expression.