Back to results
US 6,243,084 B1Granted
Method for driving plasma display
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorTakayoshi Nagai
Life of this patent
Estimating the term…
Abstract
Before applying a pulse (Vp) of the first voltage for uniforming charges between each of the first electrodes X and each of the second electrode Y1 to Yn which are adjacent to each other, a pulse (Vpp) of the fifth voltage which has a reverse polarity to that of the pulse of the first voltage and is lower than the pulse of the first voltage and higher than the pulse of the fourth voltage for sustaining a discharge is applied between the first and second electrodes. Thus, in a method for driving a plasma display in which cells are provided at intersections of a plurality of electrodes, a full write discharge is surely caused even if residual wall charges are left, and luminous efficiency is increased.
Claims18
A method for driving a plasma display,
- said plasma display having first and second substrates respectively defining first and second surfaces facing each other,
- electrode pairs disposed on said first surface and respectively defining parallel display lines, each of said electrode pairs pairing first and second electrodes parallel to each other,
- a dielectric layer covering said first and second electrodes for accumulation of wall charges on a surface thereof, said dielectric layer defining a space between said surface thereof and said second surface, and
- third electrodes disposed on said second surface and intersecting said electrode pairs without contact,
- wherein said space is filled with a discharge gas and discharge cells are respectively defined at intersections of said electrode pairs and said third electrodes,
- said method comprising a repeating step of repeatedly executing a cycle, said cycle including:
- a resetting step of applying a pulse of a first voltage across said first and second electrodes so as to cause a discharge;
- a writing step of applying a pulse of a second voltage across said second electrode of one of said electrode pairs and one of said third electrodes corresponding to one of said cells to be turned on so as to cause a discharge and thereby accumulate first and second wall charges, which are reversed in polarity to each other and define a third voltage thereacross, on portions of said surface of said dielectric layer respectively over said first and second electrodes of said one of said electrode pairs;
- and
- a discharge sustaining step of applying an AC voltage pulse as a pulse of a fourth voltage across said first and second electrodes belonging to each one of said electrode pairs to thereby turn on any one of said cells where sum of said third and fourth voltages having same polarity exceeds a firing voltage defined across said first and second electrodes of each one of said electrode pairs and sustain discharge at said any one of cells alternately changing polarity of said first and second wall charges in response to alternate change of said fourth pulse in polarity, and
- said method further comprising:
- an inserting step of inserting a prepriming step into said cycle, said prepriming step being a step of applying a pulse of a fifth voltage across said first and second electrodes belonging to each one of said electrode pairs simultaneously among a plurality of said pairs after said discharge sustaining step and before said writing step, wherein said fifth voltage is in a range between said first and fourth voltage and is reverse to said first voltage in polarity.
9 more elements
A method for driving a plasma display,
- said plasma display having first and second substrates respectively defining first and second surfaces facing each other,
- electrode pairs disposed on said first surface and respectively defining parallel display lines, each of said electrode pairs pairing first and second electrodes parallel to each other,
- a dielectric layer covering said first and second electrodes for accumulation of wall charges on a surface thereof, said dielectric layer defining a space between said surface thereof and said second surface, and
- third electrodes disposed on said second surface and intersecting said electrode pairs without contact,
- wherein said space is filled with a discharge gas and discharge cells are respectively defined at intersections of said electrode pairs and said third electrodes,
- said method comprising a repeating step of repeatedly executing a cycle, said cycle including:
- a resetting step of applying a pulse of a first voltage across said first and second electrodes so as to cause a discharge;
- a writing step of applying a pulse of a second voltage across said second electrode of one of said electrode pairs and one of said third electrodes corresponding to one of said cells to be turned on so as to cause a discharge and thereby accumulate first and second wall charges, which are reverse in polarity to each other and define a third voltage thereacross, on portions of said surface of said dielectric layer respectively over said first and second electrodes of said one of said electrode pairs;
- and
- a discharge sustaining step of applying an AC voltage pulse as a pulse of a fourth voltage across said first and second electrodes belonging to each one of said electrode pairs to thereby turn on any one of said cells where sum of said third and fourth voltages having same polarity exceeds a firing voltage defined across said first and second electrodes of each one of said electrode pairs and sustain discharge at said any one of cells alternately changing polarity of said first and second wall charges in response to alternate change of said fourth pulse in polarity, and
- said method further comprising:
- an inserting step of inserting a prepriming step into said cycle, said prepriming step being a step of applying a pulse of a fifth voltage across said first and second electrodes belonging to each one of said electrode pairs after said discharge sustaining step and before said writing step wherein said fifth voltage is in a range between said first and fourth voltage and is reverse to said first voltage in polarity, wherein
- in said inserting step, said prepriming step is inserted immediately before said resetting step, and wherein
- said fifth voltage is lower than said firing voltage.
11 more elements
A method for driving a plasma display,
- said plasma display having first and second substrates respectively defining first and second surface facing each other,
- electrode pairs disposed on said first surface and respectively defining parallel display lines, each of said electrode pairs pairing first and second electrodes parallel to each other,
- a dielectric layer covering said first and second electrodes for accumulation of wall charges on a surface thereof, said dielectric layer defining a space between said surface thereof and said second surface, and
- third electrodes disposed on said second surface and intersecting said electrode pairs without contact,
- wherein said space is filled with a discharge gas and discharge cells are respectively defined at intersections of said electrode pairs and said third electrodes,
- said method comprising a repeating step of repeatedly executing a cycle, said cycle including:
- a resetting step of applying a pulse of a first voltage across said first and second electrodes so as to cause a discharge;
- a writing step of applying a pulse of a second voltage across said second electrode of one of said electrode pairs and one of said third electrodes corresponding to one of said cells to be turned on so as to cause a discharge and thereby accumulate first and second wall charges, which are reverse in polarity to each other and define a third voltage thereacross, on portions of said surface of said dielectric layer respectively over said first and second electrodes of said one of said electrode pairs;
- and
- a discharge sustaining step of applying an AC voltage pulse as a pulse of a fourth voltage across said first and second electrodes belonging to each one of said electrode pairs to thereby turn on any one of said cells where sum of said third and fourth voltages having same polarity exceeds a firing voltage defined across said first and second electrodes of each one of said electrode pairs and sustain discharge at said any one of cells alternately changing polarity of said first and second wall charges in response to alternate change of said fourth pulse in polarity, and
- said method further comprising:
- an polarity changing step of changing said first voltage in polarity during said repeating step alternately.
9 more elements
A method for driving a plasma display,
- said plasma display having first and second substrates respectively defining first and second surface facing each other,
- electrode pairs disposed on said first surface and respectively defining parallel display lines, each of said electrode pairs pairing first and second electrodes parallel to each other,
- a dielectric layer covering said first and second electrodes for accumulation of wall charges on a surface thereof, said dielectric layer defining a space between said surface thereof and said second surface, and
- third electrodes disposed on said second surface and intersecting said electrode pairs without contact,
- wherein said space is filled with a discharge gas and discharge cells are respectively defined at intersections of said electrode pairs and said third electrodes,
- said method comprising a repeating step of repeatedly executing a cycle, said cycle including:
- a resetting step of applying a pulse of a first voltage across said first and second electrodes so as to cause a discharge;
- a writing step of applying a pulse of a second voltage across said second electrode of one of said electrode pairs and one of said third electrodes corresponding to one of said cells to be turned on so as to cause a discharge and thereby accumulate first and second wall charges, which are reverse in polarity to each other and define a third voltage thereacross, on portions of said surface of said dielectric layer respectively over said first and second electrodes of said one of said electrode pairs;
- and
- a discharge sustaining step of applying an AC voltage pulse as a pulse of a fourth voltage across said first and second electrodes belonging to each one of said electrode pairs to thereby turn on any one of said cells where sum of said third and fourth voltages having same polarity exceeds a firing voltage defined across said first and second electrodes of each one of said electrode pairs and sustain discharge at said any one of cells alternately changing polarity of said first and second wall charges in response to alternate change of said fourth pulse in polarity,
- wherein said fourth voltage is so set that said first and second wall charges caused by an application of said pulse of said fourth voltage define a voltage thereacross higher than said firing voltage, and a period from a trailing edge to a leading edge of said AC voltage pulse is set shorter than a decay time constant of space charges produced by a discharge arising at said trailing edge.
8 more elements
A method for driving a plasma display,
- said plasma display having first and second substrates respectively defining first and second surfaces facing each other,
- electrode pairs disposed on said first surface and respectively defining parallel display lines, each of said electrode pairs pairing first and second electrodes parallel to each other,
- a dielectric layer covering said first and second electrodes for accumulation of wall charges on a surface thereof, said dielectric layer defining a space between said surface thereof and said second surface, and
- third electrodes disposed on said second surface and intersecting said electrode pairs without contact,
- wherein said space is filled with a discharge gas and discharge cells are respectively defined at intersections of said electrode pairs and said third electrodes,
- said method comprising a repeating step of repeatedly executing a cycle, said cycle including:
- a resetting step of making uniform a state of said wall charges among all the cells;
- a writing step of changing a state of said wall charges in a selected one of said cells;
- and
- a discharge sustaining step of applying an AC voltage pulse as a pulse of a voltage across said first and second electrodes belonging to each one of said electrode pairs while alternately changing polarity of said pulse of said voltage,
- wherein said voltage is set so that wall charges caused by an application of said pulse of said voltage define a voltage there across higher than a firing voltage defined across said first and second electrodes belonging to each one of said electrode pairs, and a period from a trailing edge to a leading edge of said AC voltage pulse is set shorter than a decay time constant of space charges produced by a discharge arising at said trailing edge.
8 more elements
Dependencies are inferred from the claim text.