CN1975836A - Plasma display panel driving circuit and method - Google Patents

Plasma display panel driving circuit and method Download PDF

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Publication number
CN1975836A
CN1975836A CNA2006101394400A CN200610139440A CN1975836A CN 1975836 A CN1975836 A CN 1975836A CN A2006101394400 A CNA2006101394400 A CN A2006101394400A CN 200610139440 A CN200610139440 A CN 200610139440A CN 1975836 A CN1975836 A CN 1975836A
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China
Prior art keywords
mentioned
plasma display
display panel
driving circuit
voltage
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CNA2006101394400A
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Chinese (zh)
Inventor
郑海英
安炳南
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LG Electronics Nanjing Plasma Co Ltd
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LG Electronics Nanjing Plasma Co Ltd
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Publication of CN1975836A publication Critical patent/CN1975836A/en
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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
    • G09G3/2965—Driving circuits for producing the waveforms applied to the driving electrodes using inductors for energy recovery

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of Gas Discharge Display Tubes (AREA)

Abstract

The present invention relates to a plasma display panel driving circuit using disproportion maintaining. In the present invention, the plasma display panel driving circuit using the orientation discharge and the maintaining discharge, includes: a panel capacitance equally diaplaying the capacitance formed between the following first power supply and second power supply; a first power supply using the first polarity maintaining voltage to charge the said panel capacitance; a second power supply using a maintaining voltage having a opposite polarity with the the first polarity and having a different absolute value; and the first and the second energy recovery circuit. Therefore, the present inventive plasma display panel driving circuit can reduce production cost, and reduce the occupation space of the said driving circuit.

Description

Plasma display panel driving circuit and driving method
Technical field
The invention relates to one of the novel picture display device of multimedia era plasma display (Plasma Display Panel is called PDP below), more specifically say, about plasma display panel driving circuit and driving method.
Background technology
Along with the arriving of multimedia era, need more accurate, bigger, more approaching self-colored display device in the life.PDP compares with self luminous CRT, and the big picture (60-80inch) that can make thickness and be the following ultrathin plane of 10cm is made simple, and type (style) or appearance design (design) have tangible difference with existing C RT.PDP is light and thin, self is luminous can to show image more true to nature, that have more presence, and simple in structure, can make big picture flat display apparatus (display) simply, therefore, just obtained since very early HDTV (High Definition Television) actively certainly.
The most representative PDP is the 3 electrode AC creeping discharge type PDP that possess 3 electrodes and drive with alternating voltage, and it possesses the scan electrode that forms on the keeper electrode that forms on the lower basal plate and the upper substrate and keeps electrode.The discharge cell (cell) of above-mentioned 3 electrode AC creeping discharge type PDP, by keeping relative discharge between electrode and scan electrode and selected, then, keep discharge by scan electrode with keeping interelectrode surface-discharge, at this moment, the ultraviolet ray that produces in the PDP discharge cell (cell) makes light-emitting phosphor, makes visible light emit to the outside.
The GTG (Gray level) of above-mentioned PDP in order to keep image, drive with a frame (frame) being divided into ADS (the Address and Displayperiod Seperated) mode that different several subdomains (sub-field) of number of light emission times drive, each subdomain (sub-field) is divided into again: the reseting period that discharges; During selecting during the location of discharge cell (cell) and showing keeping of GTG according to discharge time.
As above the orientation discharge of the AC creeping discharge type PDP of Qu Donging and keeping needs the above high pressure of hundreds of volts in the discharge, for with orientation discharge and keep the required driving electric weight of discharge and reduce to minimum and use energy recycle device, energy recycle device reclaims scan electrode and keeps interelectrode voltage, and the driving voltage the when voltage that reclaims is used for discharging next time.
Fig. 1 is the calcspar in the energy recycle device loop of prior art ionic medium body display panel.With reference to figure 1, the energy recycle device of plasma display of the prior art is described as follows:
Energy recycle device 10,40 is the center symmetry with panel capacitance (panel capacitor is called for short panel Cp).Above-mentioned panel capacitance panel Cp and scan electrode and keep the electric capacity equivalence that forms between electrode.The 1st energy recycle device 10 provides to scan electrode and keeps pulse, and the 2nd energy recycle device 40 and 10 alternations of above-mentioned the 1st energy recycle device also provide and keep pulse to keeping electrode.Above-mentioned the 1st energy recycle device 10 comprises: be connected the inductance L between panel capacitance panel Cp and source electric capacity (source capacitor is hereinafter to be referred as Cs); Be connected in parallel on the 1st and the 3rd switch S 1 between source capacitor C s and inductance L, S3; And be connected in parallel on the 2nd and the 4th switch S 2, S4 between panel capacitance panel Cp and inductance L.Above-mentioned the 2nd switch S 2 with keep voltage source V sus and link to each other, above-mentioned the 4th switch S 4 links to each other with the base voltage source.Source capacitor C s reclaims the charging voltage among the panel capacitance panel Cp when keeping discharge, simultaneously charging voltage is offered once more panel capacitance panel Cp.Therefore, as shown in Figure 2, will charge among the capacitor C s of source and be equivalent to keep half Vs/2 voltage of voltage source V s.Again, above-mentioned inductance L and panel capacitance panel Cp together form resonant tank, the flow direction of above-mentioned the 1st to the 4th switch Control current, and above-mentioned the 1st, 2 diode D1, D2 prevent the adverse current of electric current.
Fig. 2 is the output waveform synoptic diagram in loop shown in Figure 1.Keep power supply and scanning power supply among Fig. 2 and export respectively with dotted line and the illustrated voltage of solid line, and alternately output mutually.
But as mentioned above, the energy recycle device of plasma display of the prior art has following problem points.
The first, need other door (Gate) voltage source, therefore, expense will increase.
The second, need other door (gate) voltage source, therefore, the space of circuit board (board space) also will increase.
Summary of the invention
In view of this,, the objective of the invention is to not use other door (gate) voltage source, implement the electric weight recovery operation of plasma display in order to address the above problem.
Another object of the present invention is to provide does not use other door (gate) voltage source, and therefore, expense reduces and save the plasma display panel driving circuit and the driving method in the space of circuit board.
For addressing the above problem, the present invention adopts following method to realize:
Plasma display panel driving circuit comprises: the panel capacitance panel Cp that shows the electric capacity that forms between following the 1st power supply and following the 2nd power supply of equal valuely; Keep 1st power supply of voltage with the 1st polarity to above-mentioned panel capacitance panel Cp charging; With having opposite polarity with above-mentioned the 1st polarity, and absolute value different keep 2nd power supply and 1st, 2 energy recovery circuits of voltage to above-mentioned panel capacitance panel Cp charging.
Aforesaid plasma display panel driving circuit is characterized in that said driving circuit also comprises: be connected in parallel on the 2nd, 4 switches between above-mentioned panel capacitance panel Cp and above-mentioned the 1st energy recovery circuit.
Aforesaid plasma display panel driving circuit is characterized in that said driving circuit also comprises: be connected in parallel on the 2nd, 4 switches between above-mentioned panel capacitance panel Cp and above-mentioned the 2nd energy recovery circuit.
Aforesaid plasma display panel driving circuit, it is characterized in that above-mentioned the 1st, 2 energy recovery circuits comprise respectively: when keeping discharge, charging voltage among the recovery panel capacitance panel Cp is also charged, and above-mentioned charging voltage is offered once more the source capacitor C s of panel capacitance panel Cp; Be connected between above-mentioned panel capacitance panel Cp and source capacitor C s, storage is from the inductance of the energy of above-mentioned panel recovery; Be connected in parallel on the 1st, 3 switches between above-mentioned source capacitor C s and inductance; And be positioned at above-mentioned the 1st switch and the 3rd switch room, prevent the 1st, 2 diodes of electric current adverse current.
Aforesaid plasma display panel driving circuit is characterized in that above-mentioned source capacitor C s, should with link to each other utterly.
Aforesaid plasma display panel driving circuit, the charging voltage that it is characterized in that above-mentioned source capacitor C s, be applied to and the above-mentioned voltage source that links to each other utterly, be used for driving at least one transistorized door (gate) driving voltage source of inside or external circuit structure.
The driving method of above-mentioned plasma display panel driving circuit is characterized in that making the 1st power supply different with the 2nd power source voltage absolute value, thereby externally energy electric storage means two ends form voltage source, reclaim and the invalid electric weight of regenerating.
The driving method of aforesaid plasma display panel driving circuit, a node (node) that it is characterized in that said external energy recovery electric storage means should be connected in utterly to be gone up, and said external energy recovery electric storage means is used for and above-mentioned relative utterly voltage source.
The driving method of aforesaid plasma display panel driving circuit is characterized in that above-mentioned voltage source is at least one transistorized door (gate) driving voltage source that is applied to drive in inside or the external circuit structure.
The plasma display panel driving circuit among the present invention and the beneficial effect of driving method are:
The first, door that need not be other (gate) voltage source, the electric weight that can also carry out plasma display reclaims.
The second, therefore door that need not be other (gate) voltage source, has reduced expense and has saved the space of circuit board.
Description of drawings
Fig. 1 is the calcspar in the energy recycle device loop of prior art ionic medium body display panel.
Fig. 2 is the output waveform synoptic diagram in loop shown in Figure 1.
Fig. 3 is the calcspar of unbalanced keeping among the present invention (unbalanced sustain) and energy recovery circuit.
Fig. 4 is the loop example block that the voltage that will obtain by energy recovery circuit shown in Figure 3 is used for door (gate) voltage source.
Fig. 5 a to 5b is when driving the loop primary starting among the present invention, the output waveform of energy electric capacity both end voltage with keep the output waveform synoptic diagram.
Fig. 6 a to 6b is when driving the loop among the present invention and being in normal condition, the output waveform of energy electric capacity both end voltage with keep the output waveform synoptic diagram.
The symbol description of major part in the diagram
10,40: energy recovery circuit Cs: source electric capacity (source capacitor)
Panel Cp: panel capacitance (panel capacitor) Vsus: keep voltage source
Embodiment
Below, lift preferred embodiment, and conjunction with figs. is described in detail as follows:
With ingredient identical in the prior art, give identical title and identical symbol for convenience of description, and will omit detailed description this.
Fig. 3 is the calcspar of unbalanced keeping among the present invention (unbalanced sustain) and energy recovery circuit, and Fig. 4 is the loop example block that the voltage that will obtain by energy recovery circuit shown in Figure 3 is used for door (gate) voltage source.With reference to figure 3 and Fig. 4, in the present invention, an embodiment of plasma display panel driving circuit and driving method is described as follows:
Utilize orientation discharge and the plasma display panel driving circuit of keeping discharge display frame among the present invention, comprise: panel capacitance panel Cp; The 1st power supply+Vs; The 2nd power supply-Vs; The 1st energy recovery circuit and the 2nd energy recovery circuit.Above-mentioned panel capacitance panel Cp shows the electric capacity that forms between above-mentioned the 1st power supply+Vs and above-mentioned the 2nd power supply-Vs of equal valuely, above-mentioned the 1st power supply+Vs charges into the 1st polarity to above-mentioned panel capacitance panel Cp and keeps voltage, above-mentioned the 2nd power supply-Vs to above-mentioned panel capacitance panel Cp charge into above-mentioned the 1st power supply+Vs have opposite polarity and absolute value different keep voltage.That is, if above-mentioned the 1st power supply+Vs has (+) voltage, then above-mentioned the 2nd power supply-Vs has (-) voltage, and absolute value difference separately, shown a wherein example among Fig. 4, that is, above-mentioned the 1st power supply+Vs and the 2nd power supply-Vs has the voltage of (+) 120 volts (V) and (-) 80 (V) respectively.Said driving circuit is the center with panel capacitance panel Cp, possesses 1 pair of energy recovery circuit 10,40, and above-mentioned energy recovery circuit 10,40 mutual alternations provide and keep pulse to keeping electrode pair.10,40 the 2nd, 4 switch S 2 in parallel of above-mentioned panel capacitance panel Cp and the 1st, 2 energy recovery circuits, S4, above-mentioned the 2nd switch S 2 is connected on the 1st power supply+Vs, and above-mentioned the 4th switch is connected on the 2nd power supply-Vs, and plays the effect that Control current flows to.
Above-mentioned the 1st, 2 energy recovery circuits 10,40 comprise respectively: source capacitor C s, inductance L, the 1st, 3 switch S 1, S3 and the 1st, 2 diode D1, D2.Above-mentioned source capacitor C s reclaims the charging voltage among the panel capacitance panel Cp when keeping discharge, simultaneously charging voltage is offered once more panel capacitance panel Cp.Among the present invention, and link to each other utterly, with the energy recovery electric storage means, that is, source capacitor C s is used for and above-mentioned relative utterly voltage source.The charging voltage of above-mentioned source capacitor C s is used for and above-mentioned relative utterly voltage source, is used for driving at least one transistorized door (gate) driving voltage source of inside or external circuit structure.Above-mentioned inductance L is connected between above-mentioned panel capacitance panel Cp and source capacitor C s, the energy that storage is reclaimed from above-mentioned panel, above-mentioned the 1st, 3 switch S 1, S3 are connected in parallel between above-mentioned source capacitor C s and inductance L, above-mentioned the 1st, 2 diode D1, D2 are positioned at 3 of above-mentioned the 1st switch S 1 and the 3rd switch S, prevent the adverse current of electric current.
Among the aforesaid embodiment,, keep original discharge potential as the 1st voltage of keeping voltage+Vs and the 2nd voltage-Vs, and adjust its absolute value respectively, energy electric capacity externally then, that is, capacitor C s two ends, source form the required voltage source of user (user).Again, as shown in Figure 3, external energy reclaims electric capacity, that is, the node (node) of source capacitor C s not with+Vs or-the Vs power supply links to each other, and link to each other, thereby can be used for and relative utterly voltage source with (ground) utterly.In the loop shown in Fig. 3, the voltage (Verc) at external energy recovery electric capacity two ends is as follows:
Mathematical formulae:
Verc = Vs + ( - Vs ) 2
That is, the driving method of plasma display panel among the present invention makes above-mentioned the 1st power supply+Vs different with the absolute value of above-mentioned the 2nd power supply-Vs, externally the two ends of energy electric storage means form voltage source, therefore, need not to reclaim and the invalid electric weight of regenerating, form other voltage source.
Among Fig. 4, make external energy electric capacity keep voltage about about 20 volts (V), and above-mentioned voltage is used for inner Fet Gate Drive, additional 5 volts (V) Fet turn-on device when voltage source is used for primary starting in the external energy electric capacity.
Fig. 5 a to 5b is when driving the loop primary starting among the present invention, the output waveform of energy electric capacity both end voltage with keep the output waveform synoptic diagram, Fig. 6 a to 6b is when driving the loop among the present invention and being in normal condition, the output waveform of energy electric capacity both end voltage with keep the output waveform synoptic diagram.With reference to figure 5a to 5b, to aforesaid, the driving loop of ionic medium body display panel of the present invention and the Action Specification of driving method are as follows:
Among Fig. 5 a, when this PDP drove the primary starting in loop, the voltage at energy electric capacity two ends increased gradually from 0 volt (V), near 20 volts (V); Among Fig. 5 b, keep output waveform and go up vibration at+120 volts (V) and-80 volts (V) respectively.Among Fig. 6 a, this PDP drives the loop under normal condition, and energy electric capacity both end voltage is about 20 volts (V) and stablizes, and keeps output waveform and goes up vibration at+120 volts (V) and-80 volts (V) respectively.Shown in above-mentioned Fig. 5 a to 6b, keep the source discharge potential of the 1st voltage+Vs and the 2nd voltage-Vs, adjust its absolute value respectively, then can obtain the required voltage source of user (user), therefore, improve the degree of freedom of voltage source, removed other voltage source, reduce expense, and saved the space (boardspace) of circuit board.
As mentioned above; though the present invention about plasma display panel driving circuit and driving method with preferred embodiment openly as above; right its is not in order to limit the present invention; any those skilled in the art; under the situation that does not break away from the spirit and scope of the present invention; can carry out various changes and modification; therefore protection scope of the present invention is as the criterion when looking the claim restricted portion that is proposed; all technical schemes that form obtained of taking to be equal to replacement or equivalent transformation all drop within protection scope of the present invention.

Claims (9)

1, plasma display panel driving circuit comprises: the panel capacitance that shows the electric capacity that forms between following the 1st power supply and following the 2nd power supply of equal valuely; Keep 1st power supply of voltage with the 1st polarity to above-mentioned panel capacitance charging; With having opposite polarity with above-mentioned the 1st polarity, and absolute value different keep 2nd power supply and 1st, 2 energy recovery circuits of voltage to above-mentioned panel capacitance charging.
2, plasma display panel driving circuit according to claim 1 is characterized in that it also comprises: be connected in parallel on the 2nd, 4 switches between above-mentioned panel capacitance and above-mentioned the 1st energy recovery circuit.
3, plasma display panel driving circuit according to claim 1 is characterized in that it also comprises: be connected in parallel on the 2nd, 4 switches between above-mentioned panel capacitance and above-mentioned the 2nd energy recovery circuit.
4, plasma display panel driving circuit according to claim 1, it is characterized in that above-mentioned the 1st, 2 energy recovery circuits comprise respectively: when keeping discharge, charging voltage in the recovery panel capacitance is also charged, and above-mentioned charging voltage is offered once more the source electric capacity of panel capacitance; Be connected between above-mentioned panel capacitance and source electric capacity, storage is from the inductance of the energy of above-mentioned panel recovery; Be connected in parallel on the 1st, 3 switches between above-mentioned source electric capacity and inductance and be positioned at above-mentioned the 1st switch and the 3rd switch room, prevent the 1st, 2 diodes of electric current adverse current.
5, plasma display panel driving circuit according to claim 4 is characterized in that above-mentioned source electric capacity and links to each other utterly.
6, plasma display panel driving circuit according to claim 5, the charging voltage that it is characterized in that above-mentioned source electric capacity, be applied to and the above-mentioned voltage source that links to each other utterly, be used for driving at least one transistorized gate drive voltage source of inside or external circuit structure.
7, the driving method of plasma display panel driving circuit according to claim 1 is characterized in that making the 1st power supply different with the 2nd power source voltage absolute value, thereby externally energy electric storage means two ends form voltage source, reclaim and the invalid electric weight of regenerating.
8, the driving method of plasma display panel driving circuit according to claim 7, it is characterized in that a node that external energy reclaims electric storage means is connected in utterly goes up, and said external energy recovery electric storage means is used for and above-mentioned relative utterly voltage source.
9, the driving method of plasma display panel driving circuit according to claim 8 is characterized in that above-mentioned voltage source is at least one the transistorized gate drive voltage source that is used for driving inside or external circuit structure.
CNA2006101394400A 2005-09-28 2006-09-22 Plasma display panel driving circuit and method Pending CN1975836A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020050090406A KR100762141B1 (en) 2005-09-28 2005-09-28 A driving circuit and a method of Plasma Display Panel
KR1020050090406 2005-09-28

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CN1975836A true CN1975836A (en) 2007-06-06

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3369535B2 (en) * 1999-11-09 2003-01-20 松下電器産業株式会社 Plasma display device
KR100861847B1 (en) * 2002-04-03 2008-10-07 오리온피디피주식회사 Circuit of Driving AC Type Plasma Display Panel

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KR100762141B1 (en) 2007-10-02

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