PDP-TV varies the emission luminance of gray-levels because PDP-TV controls the total number of sustain pulses according to average picture level (APL) change, which is quite essential for power management of PDP. Thus, one inverse gamma correction LUT using the peak white luminance of PDP leads to the distortion of the perceived luminance in actual PDP-TV. A new method is proposed to enhance the image quality by using variable inverse gamma corrections according to the APL change. The proposed variable correction method can minimize the distortion of the perceived luminance caused by the inherent background luminance in PDP.