| 摘要 |
An OLED device is provided to adjust the luminance of pixels according to the lightness of ambient beams by generating gamma compensation signals. An OLED(Organic Light Emitting Display) device includes a pixel unit(100), scan and data drivers(200,300), an optic sensor(700), a luminance controller(400), a data converter(500), and a switch unit(600). The pixel unit includes pixels which are connected to scan and data lines. The scan driver is electrically connected to the pixel unit through the scan lines. The data driver is connected to the pixel unit through the data lines. The optic sensor generates an optic detection signal corresponding to the lightness of ambient light. The luminance controller selects a gamma value corresponding to the optic detection signal and generates a gamma compensation signal corresponding to the selected gamma value. The data converter stores input image data or variation data varied from the input image data in response to the optic detection signal. The switch unit is formed between the optic sensor and the luminance controller. The luminance controller is driven when luminance is lower than a reference value and the data converter is driven when the luminance is higher than the reference value.
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