Display apparatus including a gamma voltage control circuit and electronic apparatus including the same

A display apparatus comprising:

• a display panel including at least one pixel;
• a reference voltage generator configured to output a pixel reference voltage to the display panel;
• a data driver configured to output a data voltage to the display panel;
• a gamma voltage generating circuit configured to output a gamma voltage to the data driver;
• and
• a gamma voltage control circuit configured to output a first reference voltage and a second reference voltage to the gamma voltage generating circuit,
• wherein the at least one pixel comprises,
• a light emitting element;
• a driving switching element configured to apply a driving current to the light emitting element;
• a data writing switching element configured to apply the data voltage to a data writing node;
• and
• a reference switching element configured to apply the pixel reference voltage to the data writing node, and
• wherein the pixel reference voltage is provided from the display panel to the gamma voltage control circuit.

An electronic apparatus comprising:

• a display panel including at least one pixel;
• a reference voltage generator configured to output a pixel reference voltage to the display panel;
• a data driver configured to output a data voltage to the display panel;
• a gamma voltage generating circuit configured to output a gamma voltage to the data driver;
• a gamma voltage control circuit configured to output a first reference voltage and a second reference voltage to the gamma voltage generating circuit;
• a driving controller configured to control the data driver;
• a processor configured to output input image data and an input control signal to the driving controller;
• a power voltage generator configured to generate an analog power voltage based on a battery voltage and output the analog power voltage to the gamma voltage control circuit;
• and
• a power supply configured to output the battery voltage to the power voltage generator,
• wherein the at least one pixel comprises,
• a light emitting element;
• a driving switching element configured to apply a driving current to the light emitting element;
• a data writing switching element configured to apply the data voltage to a data writing node;
• and
• a reference switching element configured to apply the pixel reference voltage to the data writing node,
• wherein the gamma voltage control circuit is configured to generate an analog reference voltage based on the analog power voltage and to generate a first primitive reference voltage, a second primitive reference voltage and an internal reference voltage based on the analog reference voltage, and
• wherein the gamma voltage control circuit is configured to generate the first reference voltage and the second reference voltage based on the pixel reference voltage provided from the display panel, the first primitive reference voltage, the second primitive reference voltage, and the internal reference voltage.