Patent ID: 7324114

Claim:
A method of updating image frames on a display screen of a display system, the method comprising: transferring image data in the display system by means of a separate controller to the display screen, the display system comprising a display screen for displaying image frames, a frame memory for buffering the image frames before the image frames are transferred to the display screen, a controller functionally connected to the frame memory for incorporating a synchronization signal into the image data, a display interface for receiving the image data into the frame memory, a separate controller for inputting the image data via the display interface in the frame memory, and a display driver for controlling the operation of the display system; feeding back said synchronization signal to a counter from an image frame updated to the display screen; using a limiter register to define the moment when image frame update is prevented, in response to a request presented to the display driver to input the image frame in the frame memory; and comparing the current counter value with an limit value of the limiter register and controlling said separate controller to prevent the input of image frames via the display interface in the frame memory as long as the counter value is within the limits of the limit value of the limiter register.