New first subfield waveform for improving low gray level linearity in AC-plasma display panel

A new first subfield waveform is proposed to enhance the low gray level linearity in an AC-PDP. The proposed first subfield uses a ramp-type sustain pulse instead of a square sustain pulse, thereby generating the stable lower minimum-luminance level. The addition of the proposed first subfield can lead to more powerful low gray level expression and reduce a low gray level contour.