Patent ID: 7170564
Filing Date: 2007-01-30
Classification: G09G,H04N

Abstract:
1. An on-screen display device that provides an on-screen display of a display character, including: a character generator ROM having n pieces of areas from 1st to n-th areas (n is an integer that is equal to or larger than 3), and storing predetermined font data in the respective areas; a flag holding unit for outputting an area designation flag that designates a desired number of areas among the n pieces of areas in the character generator ROM; a display character setting unit for writing a desired character code at a predetermined position in a video RAM; and a display control unit for reading the character code from the video RAM, reading font data corresponding to the character code from an area designated by the area designation flag in the character generator ROM, and outputting an on-screen output signal using the font data at a predetermined timing with respect to an input video signal.