Variable tap gamma amplifier, gamma voltage generator, and display driving integrated circuit

A display driving integrated circuit comprising:

• a row driver configured to control a plurality of gate lines connected to a display panel;
• a gamma voltage generation circuit configured to generate a plurality of gamma voltages;
• a data driver configured to control a plurality of data lines connected to the display panel based on line data using the plurality of gamma voltages;
• and
• a gamma control logic circuit configured to control the gamma voltage generation circuit,
• wherein the gamma voltage generation circuit includes a first variable tap gamma amplifier configured to generate a first tap voltage corresponding to a first gamma voltage among the plurality of gamma voltages,
• wherein the gamma control logic circuit is configured to selectively activate a first tap change signal based on a first grayscale ratio of the line data, and
• wherein the first variable tap gamma amplifier is configured to generate a second tap voltage corresponding to a second gamma voltage, different from the first gamma voltage, from among the plurality of gamma voltages in response to activation of the first tap change signal.

A variable tap gamma amplifier comprising:

• an input switch configured to select one of a first reference voltage or a second reference voltage as a non-inverting input voltage in response to a first tap change signal;
• a feedback switch configured to select one of a first tap voltage or a second tap voltage as an inverting input voltage in response to the first tap change signal;
• an input stage configured to generate a pull-up voltage and a pull-down voltage based on the inverting input voltage and the non-inverting input voltage;
• a main-output stage configured to generate the first tap voltage based on the pull-up voltage and the pull-down voltage;
• and
• a sub-output stage configured to generate the second tap voltage based on the pull-up voltage and the pull-down voltage,
• wherein the first tap voltage is provided to an external data driver as a first gamma voltage,
• wherein the second tap voltage is provided to the external data driver as a second gamma voltage, and
• wherein the first tap change signal is generated based on a grayscale ratio of a gamma range including the second gamma voltage from among line data provided to the external data driver.