An electronic device, comprising: a display panel including a plurality of source channels; and a display driver integrated circuit, which includes: a source driver including source amplifiers configured to supply signals to the source channels, respectively, and decoders connected with input terminals of the source amplifiers, respectively; a gamma generator configured to supply gamma voltages to the source driver; and a timing controller configured to control gamma voltage generation of the gamma generator, wherein the gamma generator includes: circuit devices for sub-pixels, the circuit devices configured to supply the gamma voltages to the decoders; and a switch (235,236,237,238) configured to selectively connect a first circuit device among the circuit devices, which is configured to supply a first gamma voltage to a first decoder among the decoders, with a second circuit device configured to supply a second gamma voltage to a second decoder among the decoders, in response to a control signal, characterized in that the circuit devices for the sub-pixels comprise: a digital gamma block configured to: supply a gamma setting value of a specified sub-pixel among the sub-pixels in a first screen display configuration, and supply a gamma setting value of each of the sub-pixels in a second screen display configuration, which is different from the first screen display configuration; and an analog gamma block configured to: generate the gamma tap voltages based on the gamma setting value received from the digital gamma block, and supply a gamma voltage corresponding to the generated gamma tap voltages to the decoders, respectively. a display panel including a plurality of source channels; and a display driver integrated circuit, which includes: a source driver including source amplifiers configured to supply signals to the source channels, respectively, and decoders connected with input terminals of the source amplifiers, respectively; a gamma generator configured to supply gamma voltages to the source driver; and a timing controller configured to control gamma voltage generation of the gamma generator, a source driver including source amplifiers configured to supply signals to the source channels, respectively, and decoders connected with input terminals of the source amplifiers, respectively; a gamma generator configured to supply gamma voltages to the source driver; and a timing controller configured to control gamma voltage generation of the gamma generator, circuit devices for sub-pixels, the circuit devices configured to supply the gamma voltages to the decoders; and a switch (235,236,237,238) configured to selectively connect a first circuit device among the circuit devices, which is configured to supply a first gamma voltage to a first decoder among the decoders, with a second circuit device configured to supply a second gamma voltage to a second decoder among the decoders, in response to a control signal, characterized in that the circuit devices for the sub-pixels comprise: a digital gamma block configured to: supply a gamma setting value of a specified sub-pixel among the sub-pixels in a first screen display configuration, and supply a gamma setting value of each of the sub-pixels in a second screen display configuration, which is different from the first screen display configuration; and an analog gamma block configured to: generate the gamma tap voltages based on the gamma setting value received from the digital gamma block, and supply a gamma voltage corresponding to the generated gamma tap voltages to the decoders, respectively. a digital gamma block configured to: supply a gamma setting value of a specified sub-pixel among the sub-pixels in a first screen display configuration, and supply a gamma setting value of each of the sub-pixels in a second screen display configuration, which is different from the first screen display configuration; and supply a gamma setting value of a specified sub-pixel among the sub-pixels in a first screen display configuration, and supply a gamma setting value of each of the sub-pixels in a second screen display configuration, which is different from the first screen display configuration; and an analog gamma block configured to: generate the gamma tap voltages based on the gamma setting value received from the digital gamma block, and supply a gamma voltage corresponding to the generated gamma tap voltages to the decoders, respectively. generate the gamma tap voltages based on the gamma setting value received from the digital gamma block, and supply a gamma voltage corresponding to the generated gamma tap voltages to the decoders, respectively.