US 2003/0193452 A1 · Method of driving ac-discharge plasma display panel

Abstract

A method of driving an ac-discharge type PDP is provided, which ensures a satisfactorily long sustain period and prevents the luminance of the display screen from lowering even if the count of the scan lines is increased. The PDP has row electrodes and column electrodes that form pixels arranged in a matrix array, and a dielectric layer formed to cover the pixels. In the step (a), scan pulses are applied successively to the row electrodes while data pulses are applied to the column electrodes according to a display signal in a scan period, thereby generating wall discharge in the dielectric layer due to writing discharge. The amount of the wall charge in each of the pixels varies according to the display signal. In the step (b), conversion discharge is caused in a conversion period after the scan period, thereby decreasing the amount of the wall charge in the pixels. The conversion discharge is caused in a different state in each of the pixels according to the amount of the wall charge. In the step (c) sustain pulses are applied to the row electrodes in a sustain period after the conversion period, thereby causing sustain discharge. The sustain discharge occurs in part of the pixels according to the state of the conversion discharge that has been caused in the conversion period, resulting in emission of light.

Claims32

Dependent claims

A method of driving an ac-discharge PDP, in which said PDP has row electrodes and column electrodes that form pixels arranged in a matrix array, and a dielectric layer formed to cover said pixels;

said method comprising the steps of:
(a) successively applying scan pulses to said row electrodes while applying data pulses to said column electrodes according to a display signal in a scan period, thereby generating wall discharge in said dielectric layer due to writing discharge;
an amount of said wall charge in each of said pixels varying according to said display signal;
(b) Causing conversion discharge in a conversion period after said scan period, thereby decreasing the amount of said wall charge in said pixels;
said conversion discharge being caused in a different state in each of said pixels according to the amount of said wall charge;
and
(c) applying sustain pulses to said row electrodes in a sustain period after said conversion period, thereby causing sustain discharge;
said sustain discharge occurring in part of said pixels according to the state of said conversion discharge that has been caused in said conversion period, resulting in emission of light.

5 more elements

A method of driving an ac-discharge PDP, in which the PDP has row electrodes and column electrodes that form pixels arranged in a matrix array, and a dielectric layer formed to cover said pixels;

said method comprising the steps of:
(a) commonly applying a first preliminary discharge pulse to said row electrodes in a preliminary discharge period;
said first preliminary discharge pulse serving to induce discharge only when discharge has occurred in an adjoining, previous sustain period;
(b) commonly applying a second preliminary discharge pulse to said row electrodes in said preliminary discharge period;
said second preliminary discharge pulse serving to induce discharge only when discharge has not occurred in said adjoining, previous sustain period;
(c) successively applying scan pulses to said row electrodes while data pulses are applied to said column electrodes according to a display signal in a scan period subsequent to said preliminary discharge period, thereby generating wall discharge in said dielectric layer due to writing discharge;
and
(d) Applying sustain pulses to said row electrodes in a sustain period subsequent to said scan period, thereby causing sustain discharge;
wherein a state of wall charge that has been generated in said adjoining, previous sustain period is reset by said first or second preliminary discharge pulse for initialization in said preliminary discharge period.

6 more elements

A method of driving an ac-discharge PDP, in which said PDP has scan electrodes and common electrodes and data electrodes;

said common electrodes and said scan electrodes extending parallel to each other, and said data electrode extend perpendicular to said scan and common electrodes, thereby forming pixels arranged in a matrix array;
said method comprising the steps of:
(a) successively applying scan pulses to said scan electrodes while data pulses are applied to said data electrodes according to a display signal in a scan period, thereby causing writing discharge;
and
(b) alternately applying sustain pulses to said scan electrodes and said common electrodes in a sustain period subsequent to said scan period, thereby causing sustain discharge for light emission;
wherein when a first one of said sustain pulses is applied to said scan electrodes or said common electrodes in said sustain period, a voltage applied across said scan electrodes and said data electrodes is set to be lower than a voltage applied across said scan electrodes and said common electrodes.

3 more elements

Dependencies are inferred from the claim text.

Method of driving ac-discharge plasma display panel

Life of this patent

Method of driving ac-discharge plasma display panel

Life of this patent

Abstract

Claims32