Patent ID: 7205961

Claim:
A display apparatus having a uniformity function of a pixel luminescence frequency, comprising: a demodulator for demodulating an analog input video signal having a synchronizing component and a signal component into analog R, G and B video signals that are primary color signals of the analog input video signal; an inverter for inverting only levels of the analog R, G and B video signals representing at least one picture displayed on an entire display screen for inverting luminance to generate inverted analog R, G and B video signals representing at least one luminance inverted picture displayed on an entire display screen, without inverting the synchronizing component of said analog input video signal; a switch for receiving both of the analog R, G and B video signals from said demodulator and the inverted analog R, G and B video signals from said inverter, and for selecting either the analog R, G and B video signals or the inverted analog R, G and B video signals on a display screen-by-display screen basis in response to an instruction signal so that the entire display screen is inverted when switched between the analog R, G and B video signals and the inverted analog R, G and B video signals, thereby reducing aged variation of luminance of a pixel fluorescent material; a generator for generating said instruction signal; a converter for receiving and converting the selected video signals from said switch into digital R, G and B video signals; and a plasma display for displaying said digital R, G and B video signals.