Method for driving AC-type plasma display panel (PDP)
First Claim
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1. A method of driving a surface discharge Plasma Display Panel, comprising:
- placing a plurality of common electrodes, scanning electrodes and data electrodes between a first substrate and a second substrate, the common electrodes and the scanning electrodes being arranged in parallel with each other, the data electrodes being arranged orthogonal to the common electrodes and the scanning electrodes;
forming a cell at an intersection where the common and scanning electrodes cross the data electrode, each cell being discharged when scanning and data pulses are applied at the same time; and
dividing a screen into a plurality of upper bits subfields and lower bits subfields, setting discharge times of the subfields different from each other, and scanning each subfield without a recess for discharging by combining at least two subfields and determining a time to apply an erasing pulse to improve brightness and contrast of the panel.
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Abstract
A method for driving an AC-type Plasma Display Panel (PDP), and more particularly, for improving the brightness and contrast of the panel by reducing the time of scanning while increasing the discharge time of cells. Accordingly, a video signal is designed to change, as needed, the sequential order of two bits, to insert appropriate erasing pulses into vertical electrodes according to the sequential order of the two bits, and to select the erasing time of each cell being connected to horizontal electrodes. Thus, combining any two or a plurality of subfields reduces the time of scanning while increasing the discharging time of the cells.
15 Citations
20 Claims
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1. A method of driving a surface discharge Plasma Display Panel, comprising:
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placing a plurality of common electrodes, scanning electrodes and data electrodes between a first substrate and a second substrate, the common electrodes and the scanning electrodes being arranged in parallel with each other, the data electrodes being arranged orthogonal to the common electrodes and the scanning electrodes; forming a cell at an intersection where the common and scanning electrodes cross the data electrode, each cell being discharged when scanning and data pulses are applied at the same time; and dividing a screen into a plurality of upper bits subfields and lower bits subfields, setting discharge times of the subfields different from each other, and scanning each subfield without a recess for discharging by combining at least two subfields and determining a time to apply an erasing pulse to improve brightness and contrast of the panel. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of driving a surface discharge plasma display panel having a two dimensional array of cells, each cell having a data electrode, a common electrode, and a scanning electrode passing therethrough, wherein a cell discharge is initiated by applying substantially simultaneously a data pulse and a scanning pulse to the cell, wherein the cell discharge is terminated by applying at least one erasing pulse to the cell, and wherein the time between the initiation of a cell discharge and the termination of a cell discharge is a cell discharge time, said method comprising:
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receiving a signal to display an image on the plasma display panel, the signal comprising a luminosity value for each cell, wherein each luminosity value is a binary number controlling the total discharge time of a cell during the display of the image, wherein a luminosity value of a cell comprises a plurality of bits, wherein each bit represents a subfield, and wherein a value of each bit represents an on or off discharge state of the cell during the subfield corresponding to the bit; converting the signal into a discharge initiation-termination pulse pattern, wherein the conversion includes linking the plurality of subfields together to form combination subfields, wherein the combination subfields comprise at least two subfields linked together, and wherein a portion of the discharge initiation-termination pulse pattern corresponding to a single combination subfield has at most a single discharge initiation and a single discharge termination; and applying the pulse pattern to the cells of the plasma display panel. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A method of converting a signal into an image on a surface discharge plasma display panel having a two dimensional array of cells, the signal comprises a luminosity value for each cell of the surface discharge plasma display panel, said method comprising:
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translating the signal into a discharge initiation-termination pulse pattern, wherein for each cell the translation comprises receiving the luminosity value for the cell, wherein the luminosity value comprises a plurality of bits, wherein each bit corresponds to a subfield, wherein each bit is either in an on or off state, and wherein a bit in an on state corresponds to a discharge time, creating combination subfields by separating the plurality of subfields into groups of at least two subfields, scheduling at most one discharge initiation and one discharge termination for each combination subfield; and applying pulses corresponding to the discharge initiation-termination pulse pattern to the two dimensional array of cells. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification