Patent ID: 7969427

Claim:
A display panel control device, which generates a display driving data to drive a display panel according to supplied display data, comprising: a driving data generation unit, which generates the display driving data to drive the display panel in synchronization with a synchronization signal, based on a current-frame display data and on a previous-frame data including either a previous-frame display data or a display-related data generated from the previous-frame display data; a first buffer memory, to which a current-frame data, including either the current-frame display data or a display-related data generated from the current-frame display data, is written in synchronization with the synchronization signal, and from which the written current-frame data is read in synchronization with a fast synchronization signal faster than the synchronization signal, for writing to a frame memory; a second buffer memory, to which the previous-frame data read from the frame memory is written in synchronization with a fast synchronization signal faster than the synchronization signal, and from which the written previous-frame data is read in synchronization with the synchronization signal, for supplying to the driving data generation unit; a fast synchronization signal generating unit which generates the fast synchronization signal: and a frequency detection unit which controls a frequency of the fast synchronization signal generated by the fast synchronization unit so that the frequency of the fast synchronization signal maintains same fast access to the first and second buffer memories and the frame memory; wherein during a synchronization interval corresponding to the synchronization signal, the previous-frame data is read from the frame memory and then the current-frame data is written to the frame memory.