Patent ID: 7116304

Claim:
A liquid crystal display apparatus comprising: a liquid crystal display panel including a common driver and a line driver; a liquid crystal display controller which includes a FIFO for storing display data for the liquid crystal display panel, the FIFO having a capacity of a plurality of words; a UMA memory for storing executable code and data used for an operation by a central processing unit and for storing a display data for the liquid crystal display controller, the UMA memory including a predetermined image-display memory area for storing display data; an interface means with the central processing unit; and a detection device including an address comparator that detects whether the display data in the image-display memory area in the UMA memory is updated by comparing a memory rewrite address of a memory rewrite instruction with an image-display area address of the UMA memory, the image-display area address corresponding to the predetermined image-display memory area; wherein the line driver includes a display-data storage memory so as to allow the liquid crystal display panel to refresh with display data; the detection device sends a signal to the liquid crystal display controller when the detection device detects that the display data in the image-display memory area in the UMA memory is updated; when receiving the signal from the detection device, the liquid crystal display controller obtains the display data from the UMA memory and writes the display data into the FIFO; and wherein the liquid crystal display controller sends the display data from the FIFO when the liquid crystal display panel requires the display data.