Patent ID: 8289304

Claim:
A display device for receiving and displaying an image signal, the display device comprising: a display screen; a light sensor installed near the display screen for detecting an ambient luminance; a light information determining unit for calculating a first luminance adjusting value according to the ambient luminance; an image analysis unit for analyzing the image signal to obtain a color level value; a luminance determining unit for calculating a second luminance adjusting value according to the color level value, and determining a final luminance adjusting value according to the first luminance adjusting value and the second luminance adjusting value; and a control unit for adjusting the luminance of the display screen according to the final luminance adjusting value; wherein the final luminance adjusting value is obtained with the following equation: L=L 1 Â±L 2 +S, where L is the final luminance adjusting value, L 1 is the first luminance adjusting value, L 2 is the second luminance adjusting value, S is a compensation value; and wherein the first luminance adjusting value L 1 is obtained with the following equation: L 1 =( B max âˆ’B min )*( Leâˆ’Le min )/( Le max âˆ’Le min )+ B min, where Le is the ambient luminance, Le max is a detectable maximum ambient luminance, Le min is a detectable minimum ambient luminance level, B max is an adjustable maximum luminance limit, and B min is an adjustable minimum luminance limit.