Patent ID: 6466204
Filing Date: 2002-10-15
Classification: G09G

Abstract:
A color LCD (Liquid Crystal Display) interface circuit for outputting an RGB (Red, Green, Blue) signal for an intended image and either a synchronization signal for horizontal and vertical synchronization or a composite synchronization signal to a color LCD controller in a portable radio terminal having a color LCD and a terminal controller, the circuit comprising:a first memory for storing data needed to execute a color LCD interface program and to represent fonts and color; a main controller for reading the color LCD interface program from said first memory and executing said color LCD interface program; a second memory for storing a page of image information generated during the execution of said color LCD interface program; a color processor for receiving various commands and index data from the terminal controller and generating an internal composite synchronization signal and a digital RGB signal; and a multiplexer for selecting one of the input signals according to whether a graphical display on the color LCD is a picture or represents the operational status of the portable radio terminal, said first input signal being an external RGB signal, and said second input signal being said digital RGB signal generated by said color processor.