Patent ID: 7145541
Filing Date: 2006-12-05
Classification: G09G

Abstract:
1. A display driver control circuit formed on a semiconductor substrate, the display driver control circuit comprising: an input interface for receiving externally input display data comprising first display data and second display data; a first selector coupled to the input interface and having a first output and a second output; a first register coupled to the first selector to control an operation of the first selector so that the first display data is provided to the first output of the first selector and the second display data is provided to the second output of the first selector; a display memory coupled to the first output of the first selector to store the first display data provided from the first output of the first selector; a second selector coupled to the second output of the first selector and coupled to an output of the display memory; a latch circuit coupled an output of the second selector and which stores data corresponding to one horizontal line of a display panel; an output driver coupled to the latch circuit and which generates and outputs drive signals of gradation voltages based on the first or the second display data; a second register that stores a setting value for setting a display position on the display panel for the first display data stored in the display memory; and a display position control portion coupled to the second register and controlling operations of both the second selector and the latch circuit in accordance with the setting value of the second register so that the first display data read from the display memory and the second display data provided from the first selector can be simultaneously stored in the latch circuit.