Method and system for displaying static and moving images on a display device

摘要

An on-screen display unit solves a problem of a conventional on-screen display unit. The conventional unit cannot implement a moving display of an image with a small amount hardware. The novel on-screen display unit includes a first memory for storing the image code of each of images to be displayed. A second memory stores font data of the images. A latch circuit stores information indicating one of a moving display ON mode and a moving display OFF mode. A line memory stores at least one horizontal line image. An image data generating unit generates image data to be stored in the line memory. A selector selects output data from the second memory when the latch circuit stores information indicating the moving display OFF mode and selects output data from the line memory when the latch circuit stores information indicating the moving display ON mode.