Semiconductor device including level shifter, display device including the semiconductor device and method of operating the semiconductor device

A display device comprising:

• a display panel comprising a plurality of pixel regions;
• a source driver comprising:
• a code generator generating a code comprising one bit that is in a first logic state and at least one other bit that is in a second and different logic state;
• a level shifter including a plurality of output terminals, the level shifter configured to output a second signal at a second voltage level through one of the output terminals and first signals at a first and different voltage level through the other output terminals in response to the code;
• and
• a decoder that outputs one voltage from among a plurality of voltages in response to output signals of the output terminals,
• wherein the source driver drives source lines of the display panel in response to the one voltage output from the decoder;
• a gate driver driving gate lines of the panel;
• and
• a controller controlling the source driver and the gate driver.

A method of operating a semiconductor device comprising a level shifter, the method comprising:

• receiving a code comprising one bit that is in a first logic state and at least one bit that is in a second logic state;
• controlling first signals output through all but one of a plurality of output terminals of the level shifter, to be at a first voltage level in response to the bit that is in the second logic state;
• and
• controlling a second signal output through the remaining output terminal of the level shifter, to be at a second voltage level in response to the bit that is in the first logic state and the first signals.