Gamma reference voltage generator selecting one of black candidate voltages as black gamma voltage and display apparatus including the same

A display apparatus, comprising:

• a display panel configured to display an image;
• a driving controller configured to receive input image data and to convert the input image data into a data signal;
• a gamma reference voltage generator configured to generate a black gamma voltage and a plurality of gamma voltages corresponding to the data signal;
• and
• a data driver configured to output the black gamma voltage to the display panel based on the data signal with the plurality of gamma voltages,
• wherein the gamma reference voltage generator is configured to select one of a plurality of black candidate voltages as the black gamma voltage to be output to the display panel based on a selection signal,
• wherein the plurality of gamma voltages is generated based on a first voltage,
• wherein the selection signal is based on a black level command signal from a host,
• wherein the first voltage is predetermined from the black candidate voltages independently from the black gamma voltage, and
• wherein the gamma reference voltage generator comprises:
• a first resistor string configured to receive a first reference voltage and a second reference voltage;
• a plurality of black voltage setters configured to extract the black candidate voltages from the first resistor string;
• a selector configured to select the one of the black candidate voltages as the black gamma voltage based on the selection signal;
• and
• a second resistor string configured to receive the first voltage which is the predetermined one of the black candidate voltages and a second voltage extracted from the first resistor string,
• wherein the first voltage is extracted from the first resistor string and transmitted from one of the black voltage setters to the second resistor string without being transmitted through the selector.