Method for improving the flicker problem of plasma display panel using RBC

The PDP (Plasma Display Panel) is a light-emitting matrix display device using the luminescence of a gas discharge. It has such features as thin depth, wide view angle, freedom from geographical distortion, and high brightness. The gray scale is controlled by a subfield driving method using binary weighted pulse width modulation (LSB to MSB sequences). The subfield method essentially has a flicker problem in displaying moving images. When two similar gray values are displayed in a particular interval (field frequency), the flicker phenomenon appears. In this paper, the time-amplitude comodulation subfield method using RBC (Redundant Binary Code) is proposed. This driving method increases the conventional two-level gray scale {0, 1} to a three-level gray scale {0, 1/2, 1}, combining the light-emitting time and amplitude, and selecting the driving waveform so as not to produce flicker. Even if two similar gray values are displayed alternately in field time, the light-emitting frequency is no longer divided into frame frequencies. The proposed driving method improves flicker compared to the conventional subfield method.