A method comprising: obtaining at least one of a first current amount or a first pulse width that correspond to a first luminance level; obtaining at least one of a second current amount or a second pulse width that correspond a second luminance level; detecting at least one of a difference between the first current amount and the second current amount or a difference between the first pulse width and the second pulse width; and generating, by an electronic device, a new luminance level based on at least one of the difference between the first current amount and the second current amount or the difference between the first pulse width and the second pulse width, wherein the new luminance level is higher than the first luminance level and lower than the second luminance level.