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US 6,633,268 B2Granted
AC-type plasma display apparatus
AssigneeHitachi, Ltd.
InventorsAkihiko Kougami, Keizo Suzuki, Hiroshi Kajiyama
Life of this patent
Estimating the term…
Abstract
The present invention relates to an AC-type plasma display apparatus, an object of the invention is to provide the AC-type plasma display apparatus improved a quality of a picture of a display image by realizing a multi-sub-field arrangement and a high gray scale arrangement, after by being realized an address discharge at high speed. As illustrated in FIG. 1, an address discharge is constituted so as to be driven at high speed by applying preset pulses 105 of a narrow width prior to time of application of a scanning pulse 106 exceeding a value of a discharge breakdown voltage, and by carrying out growth (growing process of Townsent) of a space charge by the preset pulses 105.
Claims25
An AC-type plasma display apparatus comprising:
- (a) display electrodes composed of paired first electrodes and second electrodes in parallel with each other;
- (b) address electrodes intersecting the display electrodes;
- and
- (c) drive circuits conducting address discharges between the display electrodes and the address electrodes;
- wherein the drive circuits conducting the address discharges include means for applying pulses equal to or more than one piece of a narrow width predetermined as preset pulses prior to a time of applying a scanning pulse applied to the display electrode;
- and
- wherein an applied voltage of the preset pulses is set as a voltage value exceeding a discharge breakdown voltage value determined by a wall charge of a reset discharge.
4 more elements
An AC-type plasma display apparatus comprising:
- (a) display electrodes composed of paired first electrodes and second electrodes in parallel with each other;
- (b) address electrodes intersecting the display electrodes;
- and
- (c) drive circuits conducting address discharges between the display electrodes and the address electrodes;
- wherein the drive circuits conducting the address discharges include means for applying pulses equal to or more than one piece of a narrow width predetermined as preset pulses prior to a time of applying a scanning pulse applied to the display electrode;
- wherein an applied voltage of the preset pulses is set as a voltage value exceeding a discharge breakdown voltage value determined by a wall charge of a reset discharge;
- wherein the AC-type plasma display apparatus provides a plurality of sub-fields within one field, the sub-field includes a reset period for at least making uniform a wall charge, an address period for writing-in, and a display sustain period for display light emission, and has a function for applying scanning pulses sequentially to an electrode corresponding to a display line during the address period;
- wherein in the address period, the drive circuits conducting the address discharges include means for applying pulses equal to or more than one piece of a narrow width predetermined as preset pulses prior to a time of applying the scanning pulse;
- and
- wherein an applied voltage of the preset pulses is a voltage value larger than a discharge breakdown voltage determined by a wall charge formed after the reset period is terminated, and the preset pulse is sequentially scanned keeping a constant time interval with the scanning pulse.
7 more elements
An AC-type plasma display apparatus comprising:
- (a) display electrodes composed of paired first electrodes and second electrodes in parallel with each other;
- (b) address electrodes intersecting the display electrodes;
- and
- (c) drive circuits conducting address discharges between the display electrodes and the address electrodes;
- wherein the drive circuits conducting the address discharges include means for applying pulses equal to or more than one piece of a narrow width predetermined as preset pulses prior to a time of applying a scanning pulse applied to the display electrode;
- wherein an applied voltage of the preset pulses is set as a voltage value exceeding a discharge breakdown voltage value determined by a wall charge of a reset discharge;
- wherein the AC-type plasma display apparatus includes a paired plurality of first display electrodes and second display electrodes in parallel with each other and a plurality of address electrodes intersecting the display electrodes, at least the display electrode includes a panel covered by dielectric layer, a time of one field is divided into a plurality of sub-fields, the sub-field includes at least a reset period, an address period, and a display sustain period;
- wherein in case of conducting write-in by applying a scanning pulse to the first display electrodes during the address period and by applying an address pulse to the address electrode, the sub-field described above includes means for applying pulses equal to or more than one piece of a narrow width having the same polarity as the scanning pulse predetermined as preset pulses prior to a time of applying the scanning pulse applied to the first display electrode;
- and
- wherein an applied voltage of the preset pulses is set as a voltage value exceeding an address discharge breakdown voltage.
7 more elements
An AC-type plasma display apparatus comprising:
- (a) display electrodes composed of paired first electrodes and second electrodes in parallel with each other;
- (b) address electrodes intersecting the display electrodes;
- and
- (c) drive circuits conducting address discharges between the display electrodes and the address electrodes;
- wherein the drive circuits conducting the address discharges include means for applying pulses equal to or more than one piece of a narrow width predetermined as preset pulses prior to a time of applying a scanning pulse applied to the display electrode;
- wherein an applied voltage of the preset pulses is set as a voltage value exceeding a discharge breakdown voltage value determined by a wall charge of a reset discharge;
- wherein the AC-type plasma display apparatus divides one field into a plurality of sub-fields and the sub-field includes at least a reset period, an address period, and a display sustain period;
- wherein during the reset period, in case of conducting write-in operation by applying an entire reset pulse accompanied by a self erasing discharge to the second display electrodes, by resetting a remained wall charge of a plasma display panel, and by applying a scanning pulse to the first display electrodes during the address period and by applying a scanning pulse to the first display electrode, the sub-field described above includes means for applying preset pulses equal to or more than one piece predetermined prior to applying the scanning pulse applied to the display electrode;
- and
- wherein an applied voltage of the preset pulses is set as a voltage value larger than that of the scanning pulse, and a voltage value exceeding a discharge breakdown voltage.
7 more elements
An AC-type plasma display apparatus comprising:
- (a) display electrodes composed of paired first electrodes and second electrodes in parallel with each other;
- (b) address electrodes intersecting the display electrodes;
- and
- (c) drive circuits conducting address discharges between the display electrodes and the address electrodes;
- wherein the drive circuits conducting the address discharges include means for applying pulses equal to or more than one piece of a narrow width predetermined as preset pulses prior to a time of applying a scanning pulse applied to the display electrode;
- wherein an applied voltage of the preset pulses is set as a voltage value exceeding a discharge breakdown voltage value determined by a wall charge of a reset discharge;
- wherein the AC-type plasma display apparatus divides one field into a plurality of sub-fields and the sub-field includes at least a reset period, an address period, and a display sustain period;
- and
- wherein, during the reset period, the sub-field described above includes
- means for conducting a lamp wave reset discharge, for resetting, and for lessening a terminated voltage value of the lamp wave to be smaller than a voltage value of a scanning pulse applied during the address period, and
- means for applying pulses equal to or more than one pieces of a narrow width of a voltage value approximately similar to the scanning pulse predetermined as a preset pulse prior to a time of applying the scanning pulse, in case of application of a scanning pulse to the first display electrodes during the address period.
8 more elements
Dependencies are inferred from the claim text.