A low-power driving apparatus comprising: an illuminance-sensing module configured to sense ambient illuminance; a minimum-perceivable-brightness-determination module configured to determine a minimum perceivable brightness perceived by a user having non-linear characteristics corresponding to the sensed ambient illuminance; a driving-power-level-determination module configured to determine a driving power level based on the determined minimum perceivable brightness; a first power-reduction-amount-determination module configured to determine a value of α, being 0 < α < 1, corresponding to a ratio of a consumption power to a maximum power based on the determined driving power level; an image-input module configured to receive an image; an image information extraction module configured to sample image information of the image supplied by the image-input module and to identify image characteristics based on the sampled image information; an image conversion module configured to convert the image based on the identified characteristics; a second power-reduction-amount-determination module configured to determine a value of β, being 0 < β < 1, corresponding to a ratio of the power consumed to the maximum power based on the image characteristics identified by the image information-sampling module; a final-power-reduction-amount-determination module configured to obtain a ratio αβ of finally consumed driving power to the maximum power based on the α value determined by the first power-reduction-amount-determination module and the β value determined by the second power-reduction-amount-determination module and to calculate a final power reduction of 1-αβ; a driving module configured to provide a light source and to supply power to the light source for displaying the input image according to the calculated final power reduction of 1-αβ; and a display module configured to display the converted image output by the image conversion module using the provided light source. an illuminance-sensing module configured to sense ambient illuminance; a minimum-perceivable-brightness-determination module configured to determine a minimum perceivable brightness perceived by a user having non-linear characteristics corresponding to the sensed ambient illuminance; a driving-power-level-determination module configured to determine a driving power level based on the determined minimum perceivable brightness; a first power-reduction-amount-determination module configured to determine a value of α, being 0 < α < 1, corresponding to a ratio of a consumption power to a maximum power based on the determined driving power level; an image-input module configured to receive an image; an image information extraction module configured to sample image information of the image supplied by the image-input module and to identify image characteristics based on the sampled image information; an image conversion module configured to convert the image based on the identified characteristics; a second power-reduction-amount-determination module configured to determine a value of β, being 0 < β < 1, corresponding to a ratio of the power consumed to the maximum power based on the image characteristics identified by the image information-sampling module; a final-power-reduction-amount-determination module configured to obtain a ratio αβ of finally consumed driving power to the maximum power based on the α value determined by the first power-reduction-amount-determination module and the β value determined by the second power-reduction-amount-determination module and to calculate a final power reduction of 1-αβ; a driving module configured to provide a light source and to supply power to the light source for displaying the input image according to the calculated final power reduction of 1-αβ; and a display module configured to display the converted image output by the image conversion module using the provided light source.