Abstract: A display device includes a display unit, a gamma voltage generator, a gamma voltage unit, a data driver, and a timing controller. The display unit includes pixels emitting light according to data signals supplied through data lines. The gamma voltage generator is configured to generate a first set of reference gamma voltages, and to supply the first set of reference gamma voltages to a gamma voltage unit. The gamma voltage unit is configured to generate gamma voltages using the first set of reference gamma voltages and a second set of reference gamma voltages, and to supply the generated gamma voltages to a data driver. The data driver is configured to generate the data signals using the generated gamma voltages, and to supply the generated data signal to the data lines. The timing controller is configured to control the data driver according to an image signal.

Abstract: An organic light emitting display apparatus that is transparent and in which transmittance of external light is high and transmittance is locally different. The organic light emitting display apparatus includes: a first region comprising a plurality of pixels for displaying an image, a first transmitting unit, and a second transmitting unit, the first and second transmitting units being for transmitting external light, and the first transmitting unit being formed smaller than the second transmitting unit; and a second region comprising a plurality of pixels for displaying an image and another first transmitting unit for transmitting external light.

Abstract: A display device includes a display unit, a gamma voltage generator, a gamma voltage unit, a data driver, and a timing controller. The display unit includes pixels emitting light according to data signals supplied through data lines. The gamma voltage generator is configured to generate a first set of reference gamma voltages, and to supply the first set of reference gamma voltages to a gamma voltage unit. The gamma voltage unit is configured to generate gamma voltages using the first set of reference gamma voltages and a second set of reference gamma voltages, and to supply the generated gamma voltages to a data driver. The data driver is configured to generate the data signals using the generated gamma voltages, and to supply the generated data signal to the data lines. The timing controller is configured to control the data driver according to an image signal.

Abstract: An organic light emitting display apparatus that is transparent and in which transmittance of external light is high and transmittance is locally different. The organic light emitting display apparatus includes: a first region comprising a plurality of pixels for displaying an image, a first transmitting unit, and a second transmitting unit, the first and second transmitting units being for transmitting external light, and the first transmitting unit being formed smaller than the second transmitting unit; and a second region comprising a plurality of pixels for displaying an image and another first transmitting unit for transmitting external light.