In order to reduce the power consumption of OLED displays and guarant ee image quality at the same time,a new OLED low-power approach based on hue,sa turation and value (HSV) color space is proposed.The approach applies value and saturation scaling (SS) integration technique to save display power.Further,the original input image is divide into two area,i.e.,region of interest (ROI) and region o f non-interest,and then a technique, gradually decreasing the value and increasing the saturation from ROI to the edge,is applied to improve image quality which can be evaluated by the mean structural similarity index (MSSIM). The MSSIM quality metric is widely used to evalua te the amount of image distortion and adopted to account for the human visual perc eption among the image processing community,which divides the original image and the output image into several windows and compares the luminance,the contrast a nd the structural similarity iwth the other windows.As a result,obvious of power OLED displays is saved without significantly affecting the perceived image qual ity.The experimental results show that the proposed approach keeps the MSSIM at a high level of 80.31% and save 57.93% OLED power when the gradual level equals 15.