Controller driver, liquid crystal display apparatus using the same, and liquid crystal driving method

A liquid crystal display apparatus including a controller driver and a liquid crystal display section driven by the controller driver, wherein the controller driver comprises:

• a compressing unit compressing received image data to generate first compressed image data and second compressed image data;
• an image memory capable of storing the second compressed image data of at least one frame;
• and
• an overdrive processing unit receiving the first compressed image data or expanded data and also receiving second compressed image data of one frame previous to the first compressed image data or expanded data and generating corrected image data where a tone value of the received image data is corrected based on the data,
• wherein the compressing unit changes compression processes performed in generating the first compressed image data and the second compressed image data with time, and
• compression processing performed in generating the first compressed image data in the compressing unit is the same as compression processing performed in compressing image data of one frame previous to the received image data to generate the second compressed image data.

A liquid crystal driving method comprising:

• receiving image data;
• compressing the received image data to generate first compressed image data;
• generating corrected image data where a tone value of the received image data is corrected based on the first compressed image data or expanded data thereof and second compressed image data of one frame previous to the first compressed image data or expanded data thereof,
• wherein compression processing performed in generating the first compressed image data and the second compressed image data is changed with time, and
• compression processing performed in generating the first compressed image data is the same as compression processing performed in compressing image data of one frame previous to the received image data to generate the second compressed image data.