Plasma display device and method for driving a plasma display panel
AssigneePanasonic Corporation
InventorsMasaru Nishimura, Tsutomu Tokunaga, Kazuaki Sakata, Atsushi Hirota, Hai Lin
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Abstract
There are provided a plasma display device in which dark contrast can be enhanced without deteriorating an image quality and a method of driving a plasma display panel. In a case of driving a plasma display device in which a magnesium oxide layer containing a magnesium oxide crystal to be excited by the irradiation of an electron beam and performing a cathode luminescence having a peak in a wavelength range of 200 to 300 nm by a sub-field method, in order to initialize all display cells, reset discharge is caused in each of the display cells in M sub-fields of N consecutive sub-fields (0<M<N).
Claims20
A plasma display device in which a plasma display panel provided with display cells having a discharge space formed at intersections of a plurality of row electrode pairs and a plurality of column electrodes arranged to cross said row electrode pairs is driven for respective N sub-fields to display images for one frame, said plasma display device comprising:
- a dielectric layer covering the plurality of row electrode pairs,
- a magnesium oxide layer comprising magnesium oxide crystals disposed on the dielectric layer and facing the discharge space, the magnesium oxide crystals including magnesium oxide single crystals that cause a cathode luminescence having a peak in a wavelength range of 200 to 300 nm when an electron beam is irradiated on to the magnesium oxide single crystals and that have a particle diameter of 2000 angstroms or more;
- an address portion that applies a scanning pulse sequentially to one electrode of each of said row electrode pairs and applies a data pulse corresponding to an input video signal to cause selective discharge in said discharge space of each of the display cells and to set each of said display cells to a turned-on cell state or a turned-off cell state in each of said sub-fields;
- a sustain portion that applies a sustain pulse to said row electrode pairs in each of said sub-fields to cause sustain discharge in said discharge space of each of said display cells set to said turned-on cell state;
- and
- a reset portion that applies a reset pulse to said row electrode pairs in M sub-fields of said N sub-fields (0<M<N) to cause reset discharge in said discharge space of each of said display cells and to initialize all said display cells.
A method for driving a plasma display panel which is provided with display cells having a magnesium oxide layer and a discharge space facing the magnesium oxide layer, formed at intersections between a plurality of row electrode pairs and a plurality of column electrodes arranged to cross the plurality of row electrode pairs, for respective N sub-fields to display images for one frame, said method for driving a plasma display panel comprising:
- an address step for causing selective discharge in said discharge space of each of said display cells based on an input video signal in the respective sub-fields to set each of said display cells to a turned-on cell state or a turned-off cell state;
- a sustain step for causing sustain discharge in said discharge space of each of said display cells set to the turned-on cell state in the respective sub-fields;
- and
- a reset step for causing reset discharge in said discharge space of each of said display cells in M sub-fields of the N sub-fields (0<M<N) to initialize all the display cells;
- wherein said magnesium oxide layer comprises magnesium oxide crystals disposed on a dielectric layer and facing the discharge space, and the magnesium oxide crystals include magnesium oxide single crystals that cause a cathode luminescence having a peak in a wavelength range of 200 to 300 nm when an electron beam is irradiated on to the magnesium oxide single crystals and that have a particle diameter of 2000 angstroms or more.
Dependencies are inferred from the claim text.