Display controller and display device

A display device, comprising a display controller and a display panel, wherein the display controller comprises:

• a timing controlling unit, for providing at least a signal;
• a buffer unit for storing image information and outputting the image information processed with certain algorithm;
• a power management unit for managing the power of the display controller;
• and
• a data driving unit for providing a signal to a data line of a display device and controlling the image which is displayed, wherein
• the timing controlling unit is electrically connected to the buffer unit, the buffer unit and the power management unit are integrated in a first circuit, and the timing controlling unit and the data driving unit are integrated in a second circuit,
• wherein, the buffer unit comprises a plurality of pins configured for connecting to the timing controlling unit, a plurality of lines are connected between the pins of the buffer unit and the timing controlling unit, and a number of the lines is less than a number of the pins configured for connecting to the timing controlling unit such that at least one of the pins configured for connecting to the timing controlling unit is floated.