A new adjustable adaptive local dimming method is proposed. In the proposed method, backlight brightness values calculated by existing local backlight algorithms are used to construct the constraint condition. Then, the backlight obtained by the local backlight algorithm is adjusted according to human visual characteristics. Based on the light-emitting diode-liquid crystal display (LED-LCD) prototype, the brightness of the backlight with the best quality is chosen as the highest backlight brightness of the image under the condition that the display image is not distorted. Finally, pixel compensation is conducted based on the optimal backlight. Experimental results show that the proposed method can make the displayed image closer to real scene perception and improve the image contrast to a certain extent.