Gamma voltage generating circuit, source driver and display device including the same

A source driver comprising:

• a gamma voltage generator configured to generate gamma voltages having voltage levels different from each other in response to a gamma enable signal;
• a digital-to-analog converter configured to generate a data voltage corresponding to a gray scale value using the gamma voltages;
• and
• a source buffers configured to output the data voltage,
• wherein the gamma voltage generator includes:
• a first resistor string configured to set a voltage range of the gamma voltages;
• gamma buffers configured to output selected voltages from divided voltages within the voltage range;
• and
• a second resistor string including tabs respectively connected to output terminals of the gamma buffers, the second resistor string being configured to divide a voltage between the tabs to generate the gamma voltages, and
• wherein at least some of the gamma buffers are configured to be turned on in a first period and turned off in a second period different from the first period.

A gamma voltage generating circuit comprising:

• a first resistor string configured to set a voltage range of gamma voltages;
• gamma buffers configured to output selected voltages from divided voltages within the voltage range;
• and
• a second resistor string including tabs respectively connected to output terminals of the gamma buffers, the second resistor string being configured to divide a voltage between the tabs to generate the gamma voltages,
• wherein at least some of the gamma buffers are configured to be turned on in a first period and turned off in a second period different from the first period.