CN1975840A - Plasma display panel driving device and its driving method - Google Patents
Plasma display panel driving device and its driving method Download PDFInfo
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- CN1975840A CN1975840A CNA2006101394523A CN200610139452A CN1975840A CN 1975840 A CN1975840 A CN 1975840A CN A2006101394523 A CNA2006101394523 A CN A2006101394523A CN 200610139452 A CN200610139452 A CN 200610139452A CN 1975840 A CN1975840 A CN 1975840A
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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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- 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
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- Power Engineering (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 device and its driving method, containing: a maintaining signal affixation portion; and a residue voltage portion applying residue voltage to the first maintaining pulse. The applied first maintaining pulse during the maintaining section period is made to have higher voltage than the other maintaining pulse, and it stably takes place the primal maintaining discharge. When the maintaining pulse arises, in order to not pass the first route disconnecting switch, a part of the energy recovery portion is provided near the output terminal of the circuit, thus reducing the heat generating phenomena of the said switch and the maintaining waveform distortion phenomena resulted by the autoeciousness component of the circuit board.
Description
Technical field
The invention relates to plasma display panel driving apparatus and driving method thereof, especially about, during keeping the interval, other are kept pulse and have the plasma display panel driving apparatus of the waveform of noble potential more and driving method thereof to keep ratio of pulse length to the total cycle length to additional first of scan electrode.
Background technology
Plasma display be the vacuum ultraviolet (VUV) that utilizes panel internal gas discharge generation with the fluorophor bump of panel inside luminous display device.Plasma display is roughly formed by front substrate A and back substrate B as shown in Figure 1.
Above-mentioned front substrate A comprises: the scan electrode 1 of Xing Chenging and keep electrode 2 successively; Accumulate in above-mentioned scan electrode and keep dielectric layer 3 on the electrode; The dielectric protective seam 4 that forms on the above-mentioned dielectric layer.
Above-mentioned scan electrode 1 and keep electrode 2 and comprise: have the amplitude of relative broad, be the transmission visible light, the transparency electrode that forms by transparency electrode material (ITO); Amplitude with relative narrower, in order to compensate the surface resistance of above-mentioned transparency electrode, the bus electrode that forms by metallics.
If to above-mentioned scan electrode 1 and keep electrode 2 and provide and drive the plasma display panel driving signal; to pile up the wall electric charge on the then above-mentioned dielectric layer 3; above-mentioned dielectric layer diaphragm 4 prevents the damage of sputter to above-mentioned dielectric layer 3, improves the emission efficiency of 2 electronics.
Above-mentioned back substrate B goes up formation and above-mentioned scan electrode 1 and keeps the keeper electrode 6 that electrode 2 intersects vertically, and above-mentioned keeper electrode top forms the dielectric layer 8 of piling up the wall electric charge successively.
Form the interlayer 7 in dividing discharge interval on the above-mentioned dielectric layer 8 and be sprayed at the side and the discharge space bottom of above-mentioned interlayer, and produce the fluorophor 9 of any one visible rays in red, green or the blueness by the ultraviolet ray excited of discharge generation.
Above-mentioned plasma display, reach a plurality of scan electrodes (Y electrode or scan electrode) of arranging with line direction and keep generation discharge between electrode (Z electrode or common electrode), display frame by a plurality of keeper electrodes (X electrode or data electrode) of arranging with column direction.
For display frame in having the plasma display of said structure, a frame (frame) is divided into different several subdomains (sub-field) of number of light emission times carries out the timesharing driving.Above-mentioned each subdomain as shown in Figure 2, by reseting period R, A during being decided to be, three of S are interval during keeping forms.
During the above-mentioned interval R that resets, provide rising edge reset signal R_up and negative edge reset signal R_dn continuously.
When above-mentioned rising edge reset signal R_up was provided, scan electrode Y and keep and produce reset discharge (surface-discharge) between electrode Z gathered the wall electric charge simultaneously in above-mentioned scan electrode and the dielectric layer of keeping electrode.When negative edge reset signal R_dn is provided, remove the wall electric charge in the discharge cell (cell), guarantee to drive the margin of operation (margin) in loop.
During A between positioning area, according to view data, to additional just (+) polar number word pulse dp of above-mentioned keeper electrode X, additional and opposite polarity negative (-) polarity scanning impulse scp of above-mentioned digit pulse to above-mentioned scan electrode Y.In the cell of additional above-mentioned digit pulse, because the potential difference (PD) between above-mentioned digit pulse and scanning impulse will produce orientation discharge (discharge relatively).
Keep during the interval S, to above-mentioned scan electrode Y with keep electrode Z and replace additional maintenance pulse sus, to the cell additional maintenance pulse of above-mentioned generation orientation discharge, then keep discharge, thus can display frame.
With above-mentioned keep interval S during, to above-mentioned scan electrode Y or the difference of keeping the high-potential voltage of keeping pulse that electrode Z provides and low-potential voltage be called and keep voltage (Vs), above-mentioned high-potential voltage and the low-potential voltage of keeping pulse is when keeping half Vs/2 of voltage, it is referred to as partly to keep (half sustain) type of drive.
The above-mentioned low-potential voltage of keeping pulse sus is not a base voltage, that is, be not ground voltage, but has the voltage of negative (-) polarity, and the size of above-mentioned voltage is to keep half Vs/2 of voltage.
As shown in Figure 2, to the additional reset signal of scan electrode Y, above-mentioned rising edge reset signal R_up is a benchmark with ground voltage GND, rises to half Vs/2 that keeps voltage, is ramp waveform then and rises to rising edge voltage Vset_up during the interval R that resets.Negative edge reset signal R_dn at first is reduced to half Vs/2 that keeps voltage, is ramp waveform then and drops to about pact-300V.
Between positioning area during the A to scan electrode Y additional scanning voltage Vsc, be in the minimum voltage of above-mentioned negative edge reset signal R_dn-Vy state following time, additional scanning voltage at above-mentioned scan electrode.
At this moment,, then add and the opposite polarity scanning impulse scp of above-mentioned digit pulse to above-mentioned scan electrode Y to keeper electrode X additional character pulse dp according to view data, if added above-mentioned scanning impulse, then above-mentioned scan electrode will be reduced to-Vy voltage.
Enter and keep interval S, then to above-mentioned scan electrode Y and keep electrode Z and replace additional maintenance pulse sus.Above-mentioned to keep pulse be benchmark with ground voltage GND, rises to Vs/2 to (+) polar orientation just, drops to Vs/2 to negative (+) polar orientation.
Promptly, originally be benchmark with ground voltage GND, additional reset signal, positioning signal and keep signal, but in contrast, partly keep type of drive with-Vs/2 is a benchmark, additional reset signal, positioning signal and keep signal, thus reduce the electric quantity consumption of plasma display, stably drive, improve the driving surplus simultaneously.
Above-mentionedly partly keep type of drive, and keep pulse in the prior art, at above-mentioned scan electrode Y and keep and form the wall electric charge among the electrode Z repeatedly at ground voltage and keep rising/decline between voltage and to keep discharge similar.
As mentioned above, in order to drive plasma display with partly keeping type of drive, as shown in Figure 3, should possess: the rising edge signal appendix 10 of additional rising edge signal R_up, the negative edge signal appendix 30 of additional negative edge signal R_dn, reclaim idle current of storing in the panel and the ER of energy recovery portion that reuses, the also additional maintenance pulse that links to each other with above-mentioned energy recovery portion keep signal appendix 20, the sweep signal appendix 40 of additional scanning signal.
At this moment, above-mentioned rising edge signal appendix 10 and keep 20 of signal appendix when additional rising edge signal, is kept the signal appendix in order to prevent that above-mentioned rising edge signal R_up from flowing into, and is possessed the 1st path blocking swtich PASS_BOTTOM.
Again, 30 of above-mentioned rising edge signal appendix 10 and sweep signal appendix 40 and negative edge signal appendix, when additional negative edge signal R_dn or scanning impulse scp, the electric current inflow is above-mentioned keeps signal appendix 20 or the ER of energy recovery portion in order to block, and possesses the 2nd path blocking swtich PASS_TOP.
Have said structure, plasma display panel driving apparatus of the prior art, the additional pulse of keeping with same-amplitude during keeping the interval, thus keep discharge.At this moment, first is kept discharge instability and will cause the whole instability of keeping discharge.Again, when keeping discharge repeatedly, signal transmits by the 1st path blocking swtich PASS_BOTTOM, causes the 1st path blocking swtich heating.Energy recovery portion is positioned at the position far away with signal output part, therefore because circuit board parasitic component will cause keeping the waveform distortion.
Summary of the invention
In view of this, in order to address the above problem, the object of the present invention is to provide and first stably takes place keep discharge, when pulse is risen, for without the 1st path blocking swtich, and near the outlet terminal of loop, arrange the part of energy recovery portion, and reduce the heating phenomenon of above-mentioned switch, reduce plasma display panel driving apparatus and the driving method thereof that waveform is distorted phenomenon of keeping that circuit board parasitic component causes.
In order to reach the foregoing invention purpose, the present invention takes following technical scheme to realize:
Plasma display panel driving apparatus comprises: keep the signal appendix and keep the surplus voltage portion of pulse additional margin voltage to first.
Aforesaid plasma display panel driving apparatus is characterized in that above-mentioned plasma display panel driving apparatus also comprises, from the energy recovery portion that panel capacitance (panel capacitor is called for short Cp) reclaims invalid electric weight.
Aforesaid plasma display panel driving apparatus is characterized in that above-mentioned energy recovery portion comprises: because and the resonance between panel capacitance, to above-mentioned panel capacitance charging and improve the 1st energy recovery portion that keeps pulse; Because and the resonance between panel capacitance, recover energy and reduce the 2nd energy recovery portion that keeps pulse from above-mentioned panel capacitance.Aforesaid plasma display panel driving apparatus is characterized in that above-mentioned the 1st energy recovery portion drives above-mentioned surplus voltage portion, makes its only additional above-mentioned surplus voltage when first is kept pulse and rises.
Aforesaid plasma display panel driving apparatus, it is characterized in that above-mentioned plasma display panel driving apparatus also comprises: when additional rising edge signal, negative edge signal or sweep signal, anti-stop signal adverse current, at least more than one path blocking swtich.
Aforesaid plasma display panel driving apparatus is characterized in that above-mentioned path blocking swtich comprises: close when adding the rising edge signal, prevent the 1st path blocking swtich of the adverse current of rising edge signal; Close when additional negative edge signal or sweep signal, prevent the 2nd path blocking swtich of the adverse current of negative edge signal or sweep signal.
Aforesaid plasma display panel driving apparatus is characterized in that above-mentioned the 1st energy recovery portion is connected between above-mentioned the 1st path blocking swtich and above-mentioned the 2nd path blocking swtich.
Aforesaid plasma display panel driving apparatus is characterized in that above-mentioned the 2nd energy recovery portion is connected on the other end of the 1st path blocking swtich that is connected with above-mentioned the 1st energy recovery portion.
Aforesaid plasma display panel driving apparatus is characterized in that above-mentioned the 1st energy recovery portion is formed by inductance, diode, switch series connection, and above-mentioned surplus voltage portion is connected between above-mentioned inductance and diode.
Aforesaid plasma display panel driving apparatus is characterized in that above-mentioned surplus voltage portion comprises: the power supply unit that power supply is provided in order to produce surplus voltage; Because the power supply that above-mentioned power supply unit provides is kept the surplus voltage appendix of the additional above-mentioned surplus voltage of pulse to first.
Aforesaid plasma display panel driving apparatus is characterized in that having the power supply unit of the above-mentioned surplus voltage M of portion and the voltage of keeping the identical size of signal generation voltage source.
Aforesaid plasma display panel driving apparatus is characterized in that the power supply that the power supply unit to above-mentioned surplus voltage portion provides is to keep 1/2 of pulse voltage.
Driving method of plasma display panel comprises: to the 1st stage of keeping pulse additional margin voltage; To additional above-mentioned the 2nd stage of keeping pulse of plasma display with surplus voltage.
Aforesaid driving method of plasma display panel is characterized in that in above-mentioned the 1st stage, only kept additional above-mentioned surplus voltage in the pulse at first.
The beneficial effect of ionic medium body display panel drive device of the present invention and driving method thereof is to make to keep during the interval additional first and keep ratio of pulse length to the total cycle length other are kept pulse and have higher current potential, makes it that initial discharge of keeping stably take place.When keeping pulse and rising, for without the 1st path blocking swtich, and near the outlet terminal of loop, arrange the part of energy recovery portion, reduce the heating phenomenon of above-mentioned switch and the waveform of keeping that circuit board parasitic component causes and distort phenomenon.
Description of drawings
Fig. 1 is the structural representation of plasma display.
Fig. 2 is the drive waveforms synoptic diagram additional in order to drive plasma display.
Fig. 3 is the synoptic diagram of prior art ionic medium body display panel drive device.
Fig. 4 is the synoptic diagram of ionic medium body display panel drive device of the present invention.
Fig. 5 is a signal output waveform synoptic diagram among the present invention.
Fig. 6 is that signal flow of the present invention is to synoptic diagram.
Equivalent circuit synoptic diagram when Fig. 7 is a resonance of the present invention.
Fig. 8 is the waveform synoptic diagram of test findings of the present invention.
Fig. 9 is first waveform enlarged drawing of keeping pulse in the test findings waveform of the present invention.
The symbol description of major part in the diagram
110: rising edge signal appendix 120: keep the signal appendix
130: negative edge signal appendix 140: sweep signal appendix
150: the M of scanner driver portion: surplus voltage portion
ER1: the 1st ER2 of energy recovery portion: the 2nd energy recovery portion
Embodiment
Below, lift preferred embodiment, and conjunction with figs. is described in detail as follows:
Fig. 4 is the synoptic diagram of ionic medium body display panel drive device of the present invention.
For display frame in plasma display, a frame is divided into several different subdomains of number of light emission times carries out the timesharing driving.Above-mentioned each subdomain is divided into: the interval R that resets of initialization whole image; Select scan line (line), and in selected scan line, select A between the positioning area of discharge cell; Show the interval S of keeping of multipole GTG according to discharge time.
In this detail list only to describing partly to keep mode or TERES mode (Technology of ReciprocalSustainer) plasma display panel driven drive unit.But content of the present invention is not to be subject to the mode of partly keeping, and can also be suitable for when driving with other modes.
A subdomain is from the interval R that resets, and in the above-mentioned interval that resets, has the just rising edge signal R_up of (+) polarity ramp waveform, a then additional negative edge signal R_dn with negative (-) polarity ramp waveform to all scan electrode Y are additional.
Because above-mentioned rising edge signal R_up, the voltage on the scan electrode Y is kept voltage Vs/2 from positive polarity gradually and is risen to higher rising edge voltage Vset_up.Because reset discharge takes place between scan electrode Y in whole discharge cell and keeper electrode X in above-mentioned rising edge signal.
At this moment, generally to keeping the additional 0V voltage of electrode Z or keeper electrode X, in order to produce above-mentioned reset discharge effectively, also can be to above-mentioned additional negative (-) polarity of electrode of keeping.
Follow above-mentioned rising edge signal R_up, to the additional ramp waveform negative edge signal R_dn that is reduced to negative (-) polarity negative edge voltage Vset_dn of above-mentioned scan electrode Y.At this moment, to above-mentioned additional negative (-) polarity bias voltage of electrode Z of keeping, make it that stable reset discharge take place.
Promptly, additional above-mentioned negative edge signal R_dn, then between above-mentioned scan electrode Y and keeper electrode X reset discharge takes place, remove the inner wall electric charge that too much generates of above-mentioned discharge cell, the potential difference (PD) between above-mentioned scan electrode Y and keeper electrode X will be near discharge initiation voltage.
A between positioning area, to additional negative successively (-) polarity scanning impulse scp of scan electrode Y, simultaneously, with above-mentioned scanning impulse synchronously, to keeper electrode X additional character pulse dp.
The voltage of above-mentioned scanning impulse scp is the scanning voltage Vsc that reduces to attached polarity scanning minimum voltage-Vy from negative (-) polarity scan bias voltage Vby.
In a discharge cell, provide scanning impulse scp and digit pulse dp respectively to the scan electrode Y and the keeper electrode X that intersect, orientation discharge will will take place above discharge initiation voltage in the potential difference (PD) between then above-mentioned scan electrode and keeper electrode between above-mentioned electrode Y and X.
Keep interval S to above-mentioned scan electrode Y with keep electrode Z and replace additional maintenance pulse sus, above-mentionedly keep pulse, keep voltage-Vs/2 by negative (-) polarity and keep voltage Vs/2 to (+) polarity just and alternately transfer, and to the additional pulse with certain amplitude of above-mentioned electrode.
Especially, keeping in the pulse first keeps the pulse pulse additional than the back and has higher voltage.Promptly keeping the certain surplus of maintenance in the pulse at first, the initial discharge stability ground of keeping is taken place.
The cell of orientation discharge (relative discharge) takes place in A between positioning area between scan electrode Y and keeper electrode X, keeping the additional above-mentioned pulse sus that keeps of interval S, then above-mentioned scan electrode Y and keep between electrode Z and will keep discharge (surface-discharge), fluorophor is with luminous simultaneously, form in all subdomains of a frame, repeatedly keep discharge and be accumulated in together, discharge cell will show multipole GTG.
As mentioned above, for to the additional above-mentioned signal of plasma display, need loop structure as shown in Figure 4.Among the present invention, the additional rising edge signal R_up of the main above-mentioned scan electrode Y of subtend, negative edge signal R_dn, scanning impulse scp and the loop structure of keeping pulse sus describe, so itself and non-limiting detail list.
That is, the loop structure that possesses for additional maintenance pulse sus among the present invention can use in driving above-mentioned loop of keeping electrode Z too.
Among the present invention, panel is assumed to be the panel capacitance that has appearance value of equal value in the loop.
For to the additional rising edge signal R_up of above-mentioned panel capacitance,, negative edge signal R_dn, scanning impulse scp and keep pulse sus, as shown in Figure 4, should comprise: the rising edge signal appendix 110 of additional rising edge signal R_up; The negative edge signal appendix 130 of additional negative edge signal R_dn; The sweep signal appendix 140 of additional scanning signal; Reclaim the idle current of storing in the panel and reuse the 1st,, the 2nd ER1 of energy recovery portion, ER2; Link to each other with above-mentioned the 2nd ER2 of energy recovery portion and the additional maintenance pulse keep signal appendix 120; When additional first kept pulse, additional certain surplus voltage keep the surplus voltage M of portion.
For to the additional above-mentioned signal of panel capacitance, also comprise scanner driver portion 150 again.The output signal of above-mentioned scanner driver portion 150 is attached in the panel capacitance.
Above-mentioned scanner driver portion 150 is connected on the output terminal in loop with push-pull type (push-pull) form, and comprise the additional above-mentioned energy recovery ER1 of portion, ER2, keep signal appendix 120, rising edge signal appendix 110, negative edge signal appendix 130, the 1st, 2 driver switch 151,152 of the signal of output such as sweep signal appendix 140 grades.
Above-mentioned rising edge signal appendix 110 links to each other with external power source Vset_up, and possesses the rising edge switch S ET_UP to the above-mentioned scanner driver 150 additional rising edge signal R_up of portion.The other end of above-mentioned rising edge switch links to each other with the 2nd node n2 in loop.Again, above-mentioned rising edge switch S ET_UP links to each other with the variable resistor of adjusting rising edge signal tilt degree.Above-mentioned variable resistor is adjusted the degree of tilt of rising edge signal during the rising edge interval.Like this, will add just (+) polarity ramp waveform signal in the scanner driver portion 150.
For voltage more stably is provided, above-mentioned rising edge signal appendix 110 also comprises, among the rising edge voltage source V set_up, with above-mentioned rising edge switch S ET_UP electric capacity in parallel.
Above-mentioned rising edge switch S ET_UP has (+) polarity just at above-mentioned scan electrode Y and keeps and open (turn on) under the state of voltage Vs/2, to the additional lentamente rising edge voltage Vset_up of scanner driver portion 150.Because the rising edge voltage of above-mentioned ramp waveform will form the wall electric charge in the panel.
For the signal that prevents 110 outputs of rising edge signal appendix flows into above-mentioned signal appendix 120 or the 2nd ER2 of energy recovery portion of keeping, also comprise the 1st path blocking swtich PASS_BOTTOM that is connected between the 1st node n1 and the 2nd node n2 again.
Above-mentioned negative edge signal appendix 130 comprises the negative edge switch S ET_DN that links to each other with external power source-Vy.Above-mentioned negative edge switch S ET_DN is identical with above-mentioned rising edge switch S ET_UP, links to each other with variable resistor, adjusts above-mentioned variable resistor, the negative edge signal R_dn of additional ramp waveform.
Above-mentioned negative edge switch S ET_DN conducting, voltage additional in the then above-mentioned panel capacitance will be reduced to negative (-) polarity negative edge voltage-Vy gradually.
Said scanning signals appendix 140 comprises: above scanning switch SCAN, the NSCAN of additional scanning voltage Vsc, the scanning impulse switch SW of additional above-mentioned scanning impulse scp.
Enter A between positioning area, then above-mentioned the 1st scanning switch SCAN conducting, to the above-mentioned scanner driver 150 additional scanning voltage Vsc of portion, in the panel capacitance the most at last by additional than risen negative (-) polarity bias voltage-Vb of scanning voltage Vsc size of scanning minimum voltage-Vy.
The conducting of above-mentioned scanning impulse switch SW, the voltage that then is attached in the above-mentioned scanning capacitance will be reduced to negative (-) polarity scanning minimum voltage-Vy.
Generally, between above-mentioned negative edge voltage Vset_dn and positioning area during the A additional scanning minimum voltage-Vy very nearly the same, therefore, above-mentioned negative edge switch S ET_DN links to each other with same external power source-Vy with above-mentioned scanning impulse switch SW, or continuous with different external power sources respectively.
Above-mentioned negative edge switch S ET_DN or the conducting of above-mentioned scanning impulse switch SW then will be reduced to negative edge voltage Vset_dn or scanning minimum voltage-Vy to the additional voltage of above-mentioned panel capacitance.
At this moment, an end of above-mentioned negative edge switch S ET_DN and above-mentioned scanning impulse switch SW is kept signal appendix 120 and the ER1 of energy recovery portion, ER2 link to each other with above-mentioned, and therefore, the voltage that is attached in the above-mentioned panel capacitance can't be reduced to-Vy.
Promptly, owing to flow to the current return of above-mentioned negative edge switch S ET_DN or above-mentioned scanning impulse switch SW from above-mentioned scan electrode Y, should be to 150 additional negative edge signal R_dn or the scanning impulse scp of scanner driver portion, but, formed from above-mentioned and kept the current return that signal appendix 120 or the ER1 of energy recovery portion, ER2 flow to scanner driver portion 150, therefore, the voltage that is attached in the above-mentioned panel capacitance will be affected.
As mentioned above, between the interval of additional negative edge signal R_dn or positioning area during the A, in order to block the current return that makes the voltage that is attached on the above-mentioned panel capacitance can't reach above-mentioned negative edge voltage Vset_dn or scanning minimum voltage-Vy, the 2nd path blocking swtich PASS_TOP is connected on the terminal of the 2nd node n2 and scanner driver portion 150 belows.
Above-mentioned the 2nd path blocking swtich PASS_TOP, during A between interval that adds negative edge signal R_dn or positioning area, blocking-up is kept the generation that signal appendix 120 or the ER1 of energy recovery portion, ER2 flow to the current return of above-mentioned scan electrode Y from above-mentioned, or blocking-up from above-mentioned negative edge signal appendix 130 adverse currents to the above-mentioned generation of keeping the current return of signal appendix 120 or the ER1 of energy recovery portion, ER2.
Thereby, to normally additional negative edge signal R_dn of above-mentioned panel capacitance and scanning impulse scp.
The above-mentioned signal appendix 120 of keeping links to each other with the 1st node, and comprises: to additional just the 1st switch S US_UP of (+) polarity external power source Vs/2 of panel capacitance; To additional negative (-) polarity external power source-Vs/2 of panel capacitance, with the 2nd switch S US_DOWN of above-mentioned the 1st switch complementary ground work.
The drain end of above-mentioned the 1st switch S US_UP links to each other with above-mentioned positive polarity external power source Vs/2, and above-mentioned the 2nd switch S US_DOWN is connected on the identical node n1 with the source source of above-mentioned the 1st switch.
The above-mentioned work of keeping signal appendix 120 drives the work of above-mentioned the 1st, the 2nd energy recovery portion, therefore, at first will understand the structure of the 1st, the 2nd energy recovery portion.
(ER1 ER2) comprises respectively: with the inductance of panel capacitance formation resonance current in above-mentioned the 1st, the 2nd energy recovery portion; Link to each other with above-mentioned inductance, and form the current return that reclaims idle current from above-mentioned panel capacitance, above energy recovery switch ER_UP, an ER_DOWN.
At this moment, above-mentioned energy recovery, links to each other with diode respectively in order to prevent the adverse current of resonance current with the end of switch ER_UP, ER_DOWN.
Form the resonance current path of trickling resonance current between above-mentioned the 1st, the 2nd energy recovery portion and panel capacitance.Form the 1st node and the 2nd node on the above-mentioned resonance current path.
Above-mentioned the 1st ER1 of energy recovery portion is positioned between the 1st path blocking swtich and the 2nd path blocking swtich, when driving without the 1st path blocking swtich.
Above-mentioned the 1st ER1 of energy recovery portion to the pulse of panel capacitance additional maintenance the time, keeps pulse and rises, and the then above-mentioned the 1st reclaims switch ER_up conducting, forms from the above-mentioned the 1st and reclaims switch flows to above-mentioned panel capacitance through inductance current return.At this moment, the inductance in above-mentioned the 1st energy recovery portion and panel capacitance produce resonance, and above-mentioned panel capacitance just will be filled (+) polarity and keep voltage Vs/2.
Then, keep the 1st switch S US_UP conducting of signal appendix 120, panel capacitance just will be kept (+) polarity and keep voltage Vs/2.
On the contrary, the 2nd of above-mentioned the 2nd energy recovery portion reclaims switch ER_DOWN conducting, then form the current return that flows to above-mentioned the 2nd recovery switch from above-mentioned panel process inductance, charge stored is recovered in the above-mentioned panel, and the voltage of above-mentioned scan electrode Y will be reduced to negative (-) polarity and be kept voltage-Vs/2.
Then, keep the 2nd switch S US_DOWN conducting of signal appendix 120, panel capacitance will be kept negative (-) polarity and keep voltage-Vs/2.
Carry out said process formation repeatedly and keep pulse, especially, the plasma display panel driving apparatus among the present invention will be because the surplus voltage M of portion when first keeps pulse in formation, will form than the current potential of generally keeping the high Δ V of pulse voltage Vs/2.
The above-mentioned surplus voltage M of portion comprises: the power supply unit that power supply is provided in order to produce surplus voltage; Because the power supply that above-mentioned power supply unit provides is kept the surplus voltage appendix of the additional above-mentioned surplus voltage of pulse to first.
The power supply unit of the above-mentioned surplus voltage M of portion is by forming with the power supply that additional just (+) polarity is kept the identical size of power supply Vs/2 in the signal.But be not to be subject to this, can also use other big or small power supplys.
The surplus margin voltage appendix of the above-mentioned surplus voltage M of portion can be used more than one electric capacity and diode, and for example: be connected above-mentioned power supply unit at resistance with an end of capacitor C parallel connection, the other end connects reciprocal diode D.The other end of above-mentioned diode D is connected between inductance L 1 and diode D1 in above-mentioned the 1st energy recovery portion.
The above-mentioned surplus voltage M of portion is when above-mentioned the 1st energy recovery portion improves first and keeps pulse, with above-mentioned the 1st ER1 of energy recovery portion additional margin voltage synchronously.Above-mentioned surplus voltage because the inductance of above-mentioned the 1st energy recovery portion and the resonance of panel capacitance are compared with generally keeping pulse voltage Vs/2, has the surplus of Δ V size.
Fig. 5 is in the plasma display panel driving apparatus of the present invention, the current direction synoptic diagram when above-mentioned surplus voltage portion drives.
Fig. 6 is the sweep signal synoptic diagram of ionic medium body display panel drive device output of the present invention.
As above-mentioned shown in Figure 6, first keep the amplitude ratio of pulse follow-up keep the big Δ V of pulse-response amplitude.Because above-mentioned Δ V can obtain the more stable initial discharge of keeping.It is also passable to improve the whole amplitude of keeping pulse, but only adds surplus in initial pulse, can reduce electric quantity consumption.If initial discharge takes place accurately and stably, then remaining discharge can also stably take place.
Fig. 7 is an above-mentioned surplus voltage portion when driving, and synchronously forms the equivalent circuit that first keeps the path of pulse with above-mentioned the 1st energy recovery portion.
At this moment, the voltage that is attached on the above-mentioned panel capacitance owing to resonance is:
The maximal value of Vp is Vs+2 Δ V, and during between positioning area, the panel capacitance voltage that will have scanning base voltage-Vb value rises to above-mentioned maximal value.
At this moment, the value of Δ V is as follows:
Fig. 8 has the synoptic diagram of keeping waveform in the test findings of test plasma display panel driving apparatus among the present invention of said structure, and Fig. 9 amplifies to show the synoptic diagram of keeping segment pulse at first.
Above-mentioned enforcement does not limit the present invention in any form, and 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 (14)
1, plasma display panel driving apparatus comprises: keep the signal appendix; Keep the surplus voltage portion of pulse additional margin voltage to first.
2, plasma display panel driving apparatus according to claim 1 is characterized in that above-mentioned plasma display panel driving apparatus also comprises: the energy recovery portion that reclaims invalid electric weight from panel capacitance.
3, plasma display panel driving apparatus according to claim 2 is characterized in that above-mentioned energy recovery portion comprises: because and the resonance between panel capacitance, to above-mentioned panel capacitance charging and improve the 1st energy recovery portion that keeps pulse; Because and the resonance between panel capacitance, recover energy and reduce the 2nd energy recovery portion that keeps pulse from above-mentioned panel capacitance.
4, plasma display panel driving apparatus according to claim 3 is characterized in that above-mentioned the 1st energy recovery portion drives above-mentioned surplus voltage portion, makes its only additional above-mentioned surplus voltage when first is kept pulse and rises.
5, plasma display panel driving apparatus according to claim 4, it is characterized in that above-mentioned plasma display panel driving apparatus also comprises: when additional rising edge signal, negative edge signal or sweep signal, anti-stop signal adverse current, at least more than one path blocking swtich.
6, plasma display panel driving apparatus according to claim 5 is characterized in that above-mentioned path blocking swtich comprises: close when adding the rising edge signal, prevent the 1st path blocking swtich of the adverse current of rising edge signal; Close when additional negative edge signal or sweep signal, prevent the 2nd path blocking swtich of the adverse current of negative edge signal or sweep signal.
7, plasma display panel driving apparatus according to claim 6 is characterized in that above-mentioned the 1st energy recovery portion is connected between above-mentioned the 1st path blocking swtich and above-mentioned the 2nd path blocking swtich.
8, claim 7 described plasma display panel driving apparatus is characterized in that above-mentioned the 2nd energy recovery portion is connected on the other end of the 1st path blocking swtich that is connected with above-mentioned the 1st energy recovery portion.
9, plasma display panel driving apparatus according to claim 3 is characterized in that above-mentioned the 1st energy recovery portion is formed by inductance, diode, switch series connection, and above-mentioned surplus voltage portion is connected between above-mentioned inductance and diode.
10, plasma display panel driving apparatus according to claim 9 is characterized in that above-mentioned surplus voltage portion comprises: the power supply unit that power supply is provided in order to produce surplus voltage; Because the power supply that above-mentioned power supply unit provides is kept the surplus voltage appendix of the additional above-mentioned surplus voltage of pulse to first.
11, plasma display panel driving apparatus according to claim 10 is characterized in that having the power supply unit of above-mentioned surplus voltage portion (M) and the voltage of keeping the identical size of signal generation voltage source.
12, plasma display panel driving apparatus according to claim 11 is characterized in that the power supply that the power supply unit to above-mentioned surplus voltage portion provides is to keep 1/2 of pulse voltage.
13, driving method of plasma display panel comprises: to the 1st stage of keeping pulse additional margin voltage; To additional above-mentioned the 2nd stage of keeping pulse of plasma display with surplus voltage.
14, driving method of plasma display panel according to claim 13 is characterized in that in above-mentioned the 1st stage, only kept additional above-mentioned surplus voltage in the pulse at first.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020050091432 | 2005-09-29 | ||
| KR1020050091432A KR100728685B1 (en) | 2005-09-29 | 2005-09-29 | Plasma display panel operating device and the operating method of the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1975840A true CN1975840A (en) | 2007-06-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101394523A Pending CN1975840A (en) | 2005-09-29 | 2006-09-22 | Plasma display panel driving device and its driving method |
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| Country | Link |
|---|---|
| KR (1) | KR100728685B1 (en) |
| CN (1) | CN1975840A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101763814B (en) * | 2008-12-31 | 2011-12-07 | 四川虹欧显示器件有限公司 | Drive circuit and method for scanning electrode of plasma display |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07186719A (en) * | 1993-12-27 | 1995-07-25 | Shiroki Corp | Sunvisor with mirror and manufacture thereof |
| KR100521489B1 (en) * | 2003-10-06 | 2005-10-12 | 삼성에스디아이 주식회사 | Driving apparatus and method of plasma display panel and plasma display device |
-
2005
- 2005-09-29 KR KR1020050091432A patent/KR100728685B1/en not_active IP Right Cessation
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2006
- 2006-09-22 CN CNA2006101394523A patent/CN1975840A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101763814B (en) * | 2008-12-31 | 2011-12-07 | 四川虹欧显示器件有限公司 | Drive circuit and method for scanning electrode of plasma display |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100728685B1 (en) | 2007-06-15 |
| KR20070036424A (en) | 2007-04-03 |
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