EP1580714A2 - Gerät und Verfahren zum Steuern einer Plasmaanzeige - Google Patents

Gerät und Verfahren zum Steuern einer Plasmaanzeige Download PDF

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Publication number
EP1580714A2
EP1580714A2 EP05004423A EP05004423A EP1580714A2 EP 1580714 A2 EP1580714 A2 EP 1580714A2 EP 05004423 A EP05004423 A EP 05004423A EP 05004423 A EP05004423 A EP 05004423A EP 1580714 A2 EP1580714 A2 EP 1580714A2
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EP
European Patent Office
Prior art keywords
sustain
polarity
scan
switching means
electrodes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05004423A
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English (en)
French (fr)
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EP1580714A3 (de
Inventor
Seong Hak Moon
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LG Electronics Inc
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LG Electronics Inc
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Publication date
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Publication of EP1580714A2 publication Critical patent/EP1580714A2/de
Publication of EP1580714A3 publication Critical patent/EP1580714A3/de
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G09G3/296—Driving circuits for producing the waveforms applied to the driving electrodes
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K13/00—Seats or covers for all kinds of closets
    • A47K13/24—Parts or details not covered in, or of interest apart from, groups A47K13/02 - A47K13/22, e.g. devices imparting a swinging or vibrating motion to the seats
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G09G3/291—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes
    • G09G3/294—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for lighting or sustain discharge
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K15/00—Acoustics not otherwise provided for
    • G10K15/04—Sound-producing devices
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/06—Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation

Definitions

  • the present invention relates to an apparatus and method for driving a plasma display panel, and more particularly, to an apparatus and method for driving a plasma display panel, wherein electromagnetic interference is minimized and stability is improved.
  • a plasma display panel (hereinafter, referred to as a ' PDP' ) is adapted to display an image including characters or graphics by light-emitting phosphors with ultraviolet of 147nm generated during the discharge of a gas such as He + Xe, Ne + Xe or He + Ne + Xe.
  • This PDP can be easily made thin and large, and it can provide greatly increased image quality with the recent development of the relevant technology.
  • a three-electrode AC surface discharge type PDP has advantages of lower driving voltage and longer product lifespan as a voltage necessary for discharging is lowered by wall charges accumulated on a surface upon discharging and electrodes are protected from sputtering caused by discharging.
  • FIG.1 is a perspective view illustrating the structure of a discharge cell of a conventional three-electrode AC surface discharge type PDP.
  • a discharge cell of a three-electrode AC surface discharge type PDP includes a scan electrodes Y and a sustain electrode Z which are formed on the bottom surface of an upper substrate 10, and an address electrode X formed on a lower substrate 18.
  • the scan electrodes Y includes a transparent electrode 12Y, and a metal bus electrode 13 which has a line width smaller than that of the transparent electrode 12Y and is disposed at one side edge of the transparent electrode.
  • the sustain electrode Z includes a transparent electrode 12Z, and a metal bus electrode 13Z which has a line width smaller than that of the transparent electrode 12Z and is disposed at one side edge of the transparent electrode.
  • the transparent electrodes 1 2Y and 1 2Z which are generally made of ITO (indium tin oxide), are formed on the bottom surface of the upper substrate 10.
  • the metal bus electrodes 13Y and 13Z are generally formed on the transparent electrodes 12Y and 12Z made of metal such as chromium (Cr), and serves to reduce a voltage drop caused by the transparent electrodes 1 2Y and 12Z having high resistance.
  • On the bottom surface of the upper substrate 10 in which the scan electrodes Y and the sustain electrode Z are placed parallel to each other is laminated an upper dielectric layer 14 and a protective layer 16.
  • the upper dielectric layer 14 is accumulated with a wall charge generated during plasma discharging.
  • the protective layer 16 is adapted to prevent damages of the upper dielectric layer 14 due to sputtering caused during plasma discharging, and improve efficiency of secondary electron emission.
  • magnesium oxide (MgO) is generally used as the protective layer 16.
  • a lower dielectric layer 22 and barrier ribs 24 are formed on the lower substrate 18 in which the address electrode X is formed.
  • a phosphor layer 26 is applied to the surfaces of both the lower dielectric layer 22 and the barrier ribs 24.
  • the address electrode X is formed on the lower substrate 18 in the direction in which the scan electrodes Y and the sustain electrode Z intersect with each other.
  • the barrier ribs 24 are in the form of stripe or lattice to prevent leakage of an ultraviolet and a visible light generated by discharging to an adjacent discharge cell.
  • the phosphor layer 26 is excited with an ultraviolet generated during the plasma discharging to generate any one visible light of red, green and blue lights.
  • An inert mixed gas is injected into the discharge spaces defined between the upper substrate 10 and the barrier ribs 24 and between the lower substrate 18 and the barrier ribs 24.
  • This PDP is driven with one frame being time-divided into a plurality of sub-fields having a different number of emission in order to implement the gray scale of an image.
  • Each of the sub fields is divided into an initialization period for initializing the entire screen, an address period for selecting a scan line and selecting a cell from the selected scan line, and a sustain period for implementing gray scales according to the number of discharging.
  • the initialization period is divided into a set-up period where a ramp-up waveform is applied, and a set-down period where a ramp-down waveform is applied.
  • a frame period (16.67ms) corresponding to 1/60 seconds is divided into eight sub-fields SF1 to SF8, as shown in FIG. 2.
  • Each of the sub-fields SF1 to SF8 is subdivided into the initialization period, the address period and the sustain period, as described above.
  • FIG. 3 is a block diagram of an apparatus for driving a PDP in the prior art.
  • the conventional apparatus for driving the PDP includes an address driving unit 32 for driving address electrodes X1 to Xm disposed in a panel 30, a scan driving unit 34 for driving scan electrodes Y1 to Yn disposed in the panel 30, a sustain driving unit 36 for driving sustain electrodes Z1 to Zn disposed in the panel 30, a driving voltage generator 40 for supplying driving voltages to the driving units 32, 34 and 36, and a timing controller 38 for supplying control signals SCS1 to SCS3 to the driving units 32, 34 and 36.
  • the driving voltage generator 40 generates a variety of driving voltages so that a driving waveform as shown in FIG. 4 can be generated, and supplies the generated voltages to the address driving unit 32, the scan driving unit 34 and the sustain driving unit 36.
  • the driving voltage generator 40 generates voltages, such as Vsetup, -Vw, Vr and Vs, and supplies the voltages to the scan driving unit 34. It generates a voltage Vs, and provides the voltage to the sustain driving unit 36.
  • the driving voltage generator 40 generates a voltage Va, and provides it to the address driving unit 32.
  • the timing controller 38 generates a variety of the switching control signals so that the driving waveform as shown in FIG. 4 can be generated, and supplies the generated switching control signals to the address driving unit 32, the scan driving unit 34 and the sustain driving unit 36.
  • the timing controller 38 generates a first switching control signal SCS1 and a second switching control signal SCS2, and supplies the signals to the scan driving unit 34 and the sustain driving unit 36, respectively.
  • the timing controller 38 generates a third switching control signal SCS3 and a data clock DCLK, and supplies them to the address driving unit 32.
  • the address driving unit 32 serves to supply image data data, which are received from the outside, to the address electrodes X1 to Xm, under the control of the data clock DCLK and the third switching control signal SCS3, both of which are supplied from the timing controller 38.
  • the scan driving unit 34 supplies a reset pulse, a scan pulse scan and a sustain pulse sus to the scan electrodes Y1 to Ym, under the control of the first switching control signal SCS1 outputted from the timing controller 38.
  • the sustain driving unit 36 supplies a positive polarity voltage (Vs), the sustain pulse sus and an erase pulse erase to the sustain electrodes Z1 to Zn, under the control of the second switching control signal SCS2 outputted from the timing controller 38.
  • a ramp-up waveform Ramp-up is applied to all the scan electrodes Y at the same time.
  • a weak discharge is generated within cells of the entire screen by the ramp-up waveform Ramp-up, thus generating wall charges within the cells.
  • a ramp-down waveform Ramp-down which falls from a voltage of the positive polarity that is lower than the peak voltage of the ramp-up waveform Ramp-up, is applied to the scan electrodes Y at the same time.
  • the ramp-down waveform Ramp-down generates a weak erase discharge within the cells to erase the wall charges generated by a set-up discharge and unnecessary charges among space charges and also to allow the wall charges necessary for an address discharge to uniformly remain within the cells of the entire screen.
  • the address discharge is generated within cells to which the data pulse data is applied.
  • the wall charges are generated within cells selected by the address discharge.
  • a positive DC voltage of the sustain voltage level (Vs) is applied to the sustain electrodes Z.
  • the sustain pulse sus is alternately applied to the scan electrodes Y and the sustain electrodes Z. Then, in cells selected by the address discharge, a sustain discharge is generated in the form of a surface discharge between the scan electrodes Y and the sustain electrodes Z whenever every sustain pulse sus is applied as wall voltages within the cells and the sustain pulse sus are added. After the sustain discharge is completed, an erase ramp waveform erase having a small pulse width is applied to the sustain electrodes Z to erase the wall charges within the cells.
  • the scan electrodes Y and the sustain electrodes Z are alternately applied with the sustain pulse sus.
  • the sustain electrodes Z is supplied with the ground voltage GND.
  • the scan electrodes Z is supplied with the ground voltage GND. That is, since a high current flows when the sustain pulse sus is provided to a given electrodes Y or Z, the remaining electrode to which the sustain pulse sus is not supplied is connected to the ground voltage GND, so that the operation is stabilized.
  • any one of the scan electrodes Y and the sustain electrodes Z has to be connected to the ground voltage GND so that a voltage level can be stabilized. Practically, however, if any one of the scan electrodes Y and the sustain electrodes Z is connected to the ground voltage GND, introduction of external noise, generation of EMI, etc. can be minimized. In the prior art, however, since a variety of driving waveforms are supplied to the scan electrodes Y and the sustain electrodes Z, it is difficult to secure the stability of a PDP.
  • the scan driving unit 34 and the sustain driving unit 36 include switching means which are connected to the scan electrodes Y and the sustain electrodes Z, respectively, in a push-pull type. If the switching means are connected in the push-pull type as such, lots of the switching means are needed. As a result, there are problems in that the manufacture cost is increased, leakage current is generated, etc.
  • the present invention has been made in view of the above problems occurring in the prior art, and it is an object of the present invention to provide an apparatus and method for driving a plasma display panel, wherein electromagnetic interference can be minimized and stability can be also improved.
  • an apparatus for driving a PDP including a plurality of scan electrodes and sustain electrodes, which are formed parallel to each other, and a scan driving unit for alternately supplying sustain pulses of the positive polarity and the negative polarity to the scan electrodes during a sustain period, wherein the sustain electrodes are connected to a ground voltage source, and thus always keep a ground voltage.
  • the scan driving unit includes a first switching means disposed between a sustain voltage source of the positive polarity and the scan electrodes, a second switching means disposed between a sustain voltage source of the negative polarity and the scan electrodes, a third switching means disposed between the ground voltage source and the scan electrodes, and fourth switching means and diodes, which are connected between a common terminal of the first to third switching means and the scan electrodes, respectively, in a parallel manner.
  • the voltage of the positive polarity of the sustain voltage source is applied to the scan electrodes as the sustain pulse of the positive polarity through the first switching means and the diodes.
  • the sustain pulse of the negative polarity is applied to the scan electrodes.
  • the third switching means and the fourth switching means are turned on, and after the sustain pulse of the negative polarity is applied, the third switching means are turned on.
  • the voltage of the ground voltage source is applied to the scan electrodes.
  • the scan driving unit includes a first switching means disposed between a sustain voltage source of the positive polarity and the scan electrodes, a second switching means disposed between a sustain voltage source of the negative polarity and the scan electrodes, a third switching means disposed between the ground voltage source and the scan electrodes, fourth switching means respectively disposed between the second switching means and the scan electrodes, and fifth switching means and diodes, which are connected between a common terminal of the first and third switching means and the scan electrodes, respectively, in a parallel manner.
  • the voltage of the positive polarity of the sustain voltage source is applied to the scan electrodes as the sustain pulse of the positive polarity through the first switching means and the diodes.
  • the sustain pulse of the negative polarity is applied to the scan electrodes.
  • the third switching means and the fifth switching means are turned on, and after the sustain pulse of the negative polarity is applied, the third switching means are turned on.
  • the voltage of the ground voltage source is applied to the scan electrodes.
  • a method of driving a PDP including the steps of alternately supplying sustain pulses of the positive polarity and the negative polarity to scan electrodes during a sustain period of sub-fields, and supplying a ground voltage to sustain electrodes, which are formed parallel to scan electrodes, during a sub-field period.
  • sustain electrodes since sustain electrodes always keep a ground voltage, introduction of external noise, generation of EMI, etc. can be minimized. Furthermore, in the present invention, sustain electrodes are always kept to a ground voltage, i.e., the flow path of current shortens. Due to this, generation of additional noise can be prevented, and the stability of a PDP can be thus secured.
  • FIG.1 is a perspective view illustrating the structure of a discharge cell of a conventional three-electrode AC surface discharge type PDP;
  • FIG. 2 shows one frame of a PDP
  • FIG. 3 is a block diagram of an apparatus for driving a conventional PDP
  • FIG. 4 is a waveform showing a method of driving a conventional PDP
  • FIG. 5 is a block diagram showing an apparatus for driving a PDP according to an embodiment of the present invention.
  • FIG. 6 is a detailed circuit diagram of the scan driving unit shown in FIG. 5;
  • FIG. 7 shows sustain pulses supplied to scan electrodes corresponding to the timing diagram of the switches shown in FIG. 6;
  • FIG. 8 is another detailed circuit diagram of the scan driving unit shown in FIG. 5.
  • FIG. 9 shows sustain pulses supplied to scan electrodes corresponding to the timing diagram of the switches shown in FIG. 8.
  • FIG. 5 is a block diagram showing an apparatus for driving a PDP according to an embodiment of the present invention.
  • the apparatus for driving the PDP includes a address driving unit 52 for driving address electrodes X1 to Xm disposed in a panel 50, a scan driving unit 54 for driving scan electrodes Y1 to Yn disposed in the panel 50, a driving voltage generator 58 for applying a driving voltage to the driving units 52, 54, and a timing controller 56 for applying control signals SCS1, SCS2 to the driving units 52, 54.
  • sustain electrodes Z1 to Zn (omitted) disposed in the panel 50 are connected to a ground voltage GND.
  • the driving voltage generator 58 generates a variety of driving voltages, and supplies the generated voltages to the address driving unit 52 and the scan driving unit 54 so that a predetermined driving waveform can be generated.
  • the timing controller 56 generates various switching control signals, and applies them to the address driving unit 52 and the scan driving unit 54 so that a predetermined driving waveform can be generated. For example, the timing controller 56 generates a first switching control signal SCS1, and applies it to the scan driving unit 54. It also generates a second switching control signal SCS2 and a data clock DCLK, and applies them to the address driving unit 52.
  • the address driving unit 52 supplies image data data, which are supplied from the outside, to the address electrodes X1 to Xm according to the data clock DCLK and the second switching control signal SCS2, both of which are supplied from the timing controller 56.
  • the scan driving unit 54 applies a reset pulse, a scan pulse, and sustain pulses of the negative polarity and the positive polarity to the scan electrodes Y1 to Ym, according to the first switching control signal SCS1 that is supplied from the timing controller 56.
  • the scan driving unit 5 supplies the sustain pulses, which switch from the negative polarity and the positive polarity, and vice versa, to the scan electrodes Y1 to Ym in order to generate a sustain discharge together with the sustain electrodes Z1 to Zn to which the ground voltage GND is always applied.
  • FIG. 6 is a detailed circuit diagram of the scan driving unit shown in FIG. 5.
  • the scan driving unit 54 includes a driving voltage supply unit 60, and fourth switches S4 connected to the scan electrodes Y1 to Ym, respectively.
  • the fourth switches S4 are disposed between the driving voltage supply unit 60 and the scan electrodes Y, and supply the driving voltage received from the driving voltage supply unit 60 to the scan electrodes Y. At this time, the fourth switches S4 are connected in the open drain manner.
  • the switches according to the present invention can be implemented using MOS TR, FET, IGBT, SCR, and the like. If the fourth switches S4 are connected in the open drain manner, leakage current between the scan electrodes Y1 to Yn, etc. can be prevented from occurring. Since the fourth switches S4 are also disposed in the scan electrodes Y one by one, the number of components mounted in the scan driving unit 54 can be minimized. Further, fourth diodes D4, which are respectively connected to the fourth switches S4 in a parallel manner, are further disposed between the driving voltage supply unit 60 and the scan electrodes Y (where, the fourth diodes D4 can be diodes within the fourth switches S4 or external diodes additionally disposed). The fourth diodes D4 serve to supply the driving voltage, which is supplied from the driving voltage supply unit 60, to the scan electrodes Y, and also to prevent the driving voltage from the scan electrodes Y from being supplied to the driving voltage supply unit 60.
  • the driving voltage supply unit 60 includes a first switch S1 connected between a sustain voltage source +Vs of the positive polarity and the fourth switches S4, a second switch S2 connected between a sustain voltage source -Vs of the negative polarity and the fourth switches S4, and a third switch S3 connected between a ground voltage GND and the fourth switches S4.
  • the first to third switches S1 to S3 are turned on and off under the control of the timing controller 56.
  • FIG. 7 shows sustain pulses supplied to the scan electrodes corresponding to the timing diagram of the switches shown in FIG. 6.
  • the sustain electrodes Z are kept to the ground voltage GND, and the scan electrodes Y are alternately supplied with the sustain pulse sus + of the positive polarity and the sustain pulse sus- of the negative polarity (actually, the ground voltage GND is provided between the voltage +Vs, -Vs of the positive polarity and the negative polarity for a predetermined time).
  • a sustain discharge is generated in the form of surface discharge between the scan electrodes Y and the sustain electrodes Z whenever the sustain pulses sus+, sus- are applied.
  • the first switch S1 When the sustain pulse sus+ of the positive polarity is applied, the first switch S1 is turned on. If the first switch S1 is turned on, a voltage of the sustain voltage source +Vs of the positive polarity is supplied to the scan electrodes Y1 to Yn through the first switch S1 and the fourth diodes D4. At this time, the scan electrodes Y1 to Yn are supplied with the sustain pulse sus + of the positive polarity.
  • the third and fourth switches S3, S4 are turned on. If the third switch S3 is turned on, the ground voltage GND is applied to the scan electrodes Y1 to Yn through the third and fourth switches S3, S4.
  • the third switch S3 is turned off and the second switch S2 is turned on. If the second switch S2 is turned on, the voltage of the sustain voltage source -Vs of the negative polarity is applied to the scan electrodes Y1 to Yn through the second and fourth switches S2, S4. At this time, the scan electrodes Y1 to Yn are supplied with the sustain pulse sus- of the negative polarity.
  • the third switch S3 is turned on, and the second and fourth switches S2, S4 are also turned off. If the third switch S3 is turned on, the ground voltage GND is applied to the scan electrodes Y1 to Yn via the third switch S3 and the fourth diodes D4. Practically, in the present invention, while this process is repeatedly performed, the sustain pulses sus+, sus- of the positive polarity and the negative polarity are alternately supplied to the scan electrodes Y1 to Yn.
  • the second switch S2 keeps turned on. Further, when the second switch S2 keeps turned on, the fourth switches S4 are sequentially turned on to supply the scan pulse scan to the scan electrodes Y. At this time, the address driving unit 52 supplies the data pulse, which is synchronized to the scan pulse scan, to the data lines X1 to Xm.
  • the sustain electrodes Z are always (during one sub-field period) supplied with the ground voltage GND. If the ground voltage GND is always supplied to the sustain electrodes Z as such, introduction of external noise, generation of EMI, etc., can be minimized, and the stability of a PDP can be improved accordingly.
  • the sustain electrodes Z are always connected to the ground voltage GND.
  • a sustain driving unit as in the prior art can be omitted, and EMI, etc., which is generated due to driving of the sustain driving unit, can be prevented.
  • the sustain electrodes Z are directly connected to the ground voltage GND, additional generation of noise can be prevented.
  • only one switching means S4 is connected to each of the scan electrodes Y in the off drain mode. Therefore, the number of components can be minimized, the manufacture const can be reduced, and leakage current between electrodes can be thus prevented.
  • the scan driving unit 54 can be constructed in various forms.
  • the scan driving unit 54 can be constructed, as shown in FIG. 8.
  • FIG. 8 is another detailed circuit diagram of the scan driving unit shown in FIG. 5.
  • the scan driving unit 54 includes a driving voltage supply unit 64, and fourth switches S4 and fifth switches S5, which are disposed between scan electrodes Y1 to Ym respectively.
  • the driving voltage supply unit 64 includes a first switch S1 connected to a sustain voltage source +Vs of the positive polarity, a third switch S3 connected to the ground voltage GND, and a second switch S2 connected to a sustain voltage source -Vs of the negative polarity.
  • the first to third switches S1 to S3 are turned on and off under the control of the timing controller 56.
  • the fourth switches S4 are connected between the second switch S2 and the scan electrodes Y1 to Ym, respectively, and are turned on and off under the control of the timing controller 56.
  • the fifth switches S5 are connected between a common terminal of the first and third switches S1, S3 and the scan electrodes Y1 to Ym, respectively, and are turned on and off under the control of the timing controller 56.
  • the fourth switches S4 are connected to the fourth diodes D4 in a parallel manner
  • the fifth switches S5 are connected to the fifth diodes D5 in a parallel manner.
  • the fourth and fifth diodes D4 and D5 serve to prevent a driving voltage, which is supplied from the scan electrodes Y1, from being applied to the driving voltage supply unit 64.
  • the first switch S1 is turned on. If the first switch S1 is turned on, the voltage of the sustain voltage source +Vs of the positive polarity is applied to the scan electrodes Y1 to Yn via the first switch S1 and the fifth diode D5. At this time, the scan electrodes Y1 to Yn are supplied with the sustain pulse sus + of the positive polarity.
  • the first switch S1 is turned off, and the third and fifth switches S3 and S5 are also turned on. If the third and fifth switches S3 and S5 are turned on, the ground voltage GND is applied to the scan electrodes Y1 to Yn through the third and fifth switches S3 and S5.
  • the third and fifth switches S3, S5 are turned off, and the second and fourth switches S2, S4 are also turned on. If the second and fourth switches S2, S4 are turned on, the voltage of the negative polarity of the sustain voltage source -Vs is applied to the scan electrodes Y1 to Yn through the second switch S2 and the fourth switch S4. At this time, the scan electrodes Y1 to Yn are supplied with the sustain pulse sus- of the negative polarity.
  • the second and fourth switches S2, S4 are turned off, and the third switch S3 is also turned on. If the third switch S3 is turned on, the ground voltage GND is applied to the scan electrodes Y1 to Yn through the third switch S3 and the fifth diode D5. Practically, in the present invention, while this process is repeatedly performed, the sustain pulses sus + , sus- of the positive polarity and the negative polarity are alternately applied to the scan electrodes Y1 to Yn.
  • the second switch S2 keeps turned on. Further, when the second switch S2 keeps turned on, the fourth switches S4 are sequentially turned on to sequentially apply scan pulses scan to the scan electrodes Y. At this time, the address driving unit 52 applies the data pulse, which is synchronized to the scan pulse scan, to the data lines X1 to Xm.
  • the sustain electrodes Z are always (during one sub-field period) supplied with the ground voltage GND. If the ground voltage GND is always applied to the sustain electrodes Z as such, introduction of external noise, generation of EMI, etc. can be minimized, and the stability of a PDP can be improved accordingly.
  • the sustain electrodes Z are always connected to the ground voltage GND, a sustain driving unit as in the prior art can be omitted.
  • Generation of EMI which is generated due to driving of the sustain driving unit, can be also prevented.
  • the sustain electrodes Z are directly connected to the ground voltage GND, additional generation of noise can be prevented.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Power Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Computer Hardware Design (AREA)
  • Multimedia (AREA)
  • Acoustics & Sound (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of Gas Discharge Display Tubes (AREA)
  • Transforming Electric Information Into Light Information (AREA)
EP05004423A 2004-03-05 2005-03-01 Gerät und Verfahren zum Steuern einer Plasmaanzeige Withdrawn EP1580714A3 (de)

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EP1598798A2 (de) 2004-05-19 2005-11-23 LG Electronics Inc. Plasmaanzeigegerät und Ansteuerungsverfahren dafür
EP1708159A2 (de) * 2005-03-29 2006-10-04 LG Electronics, Inc. Zeilentreiber für eine Treiberschaltung einer Plasmaanzeigetafel und Plasmaanzeigegerät damit
EP1901272A2 (de) * 2006-09-12 2008-03-19 LG Electronics Inc. Plasmaanzeigevorrichtung
EP1901270A1 (de) * 2006-09-12 2008-03-19 LG Electronics Inc. Plasmaanzeigevorrichtung und Verfahren zu ihrer Ansteuerung

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KR100719588B1 (ko) * 2005-12-28 2007-05-17 삼성에스디아이 주식회사 플라즈마 디스플레이 패널
CN100418119C (zh) * 2006-05-24 2008-09-10 乐金电子（南京）等离子有限公司 等离子显示装置

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EP1598798A2 (de) * 2004-05-19 2005-11-23 LG Electronics Inc. Plasmaanzeigegerät und Ansteuerungsverfahren dafür
EP1622118A2 (de) * 2004-07-27 2006-02-01 LG Electronics Inc. Plasmaanzeigegerät und Treiberverfahren dafür
EP1657700A1 (de) * 2004-11-15 2006-05-17 Samsung SDI Co., Ltd. Plasmaanzeigevorrichtung und Verfahren zu ihrer Ansteuerung

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US20020044106A1 (en) * 1998-10-27 2002-04-18 Koki Iseki Plasma display and method of driving the same
EP1065650A2 (de) * 1999-06-30 2001-01-03 Fujitsu Limited Ansteuerungsgerät und Verfahren für eine Plasmaanzeigetafel
EP1598798A2 (de) * 2004-05-19 2005-11-23 LG Electronics Inc. Plasmaanzeigegerät und Ansteuerungsverfahren dafür
EP1622118A2 (de) * 2004-07-27 2006-02-01 LG Electronics Inc. Plasmaanzeigegerät und Treiberverfahren dafür
EP1657700A1 (de) * 2004-11-15 2006-05-17 Samsung SDI Co., Ltd. Plasmaanzeigevorrichtung und Verfahren zu ihrer Ansteuerung

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EP1598798A2 (de) 2004-05-19 2005-11-23 LG Electronics Inc. Plasmaanzeigegerät und Ansteuerungsverfahren dafür
EP1598798A3 (de) * 2004-05-19 2007-09-19 LG Electronics Inc. Plasmaanzeigegerät und Ansteuerungsverfahren dafür
US7701413B2 (en) 2004-05-19 2010-04-20 Lg Electronics Inc. Plasma display apparatus and driving method thereof
EP1708159A2 (de) * 2005-03-29 2006-10-04 LG Electronics, Inc. Zeilentreiber für eine Treiberschaltung einer Plasmaanzeigetafel und Plasmaanzeigegerät damit
EP1708159A3 (de) * 2005-03-29 2008-03-19 LG Electronics, Inc. Zeilentreiber für eine Treiberschaltung einer Plasmaanzeigetafel und Plasmaanzeigegerät damit
EP1901272A2 (de) * 2006-09-12 2008-03-19 LG Electronics Inc. Plasmaanzeigevorrichtung
EP1901270A1 (de) * 2006-09-12 2008-03-19 LG Electronics Inc. Plasmaanzeigevorrichtung und Verfahren zu ihrer Ansteuerung
EP1901272A3 (de) * 2006-09-12 2008-05-14 LG Electronics Inc. Plasmaanzeigevorrichtung
US7733303B2 (en) 2006-09-12 2010-06-08 Lg Electronics Inc. Plasma display apparatus and method of driving the same
US7928931B2 (en) 2006-09-12 2011-04-19 Lg Electronics Inc. Plasma display apparatus

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TW200530984A (en) 2005-09-16
JP2005250489A (ja) 2005-09-15
EP1580714A3 (de) 2006-12-27
RU2005105956A (ru) 2006-08-10
KR101042992B1 (ko) 2011-06-21
KR20050089570A (ko) 2005-09-08
CN1664896A (zh) 2005-09-07

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