CN1971692A - Apparatus and method for driving plasma display panel - Google Patents
Apparatus and method for driving plasma display panel Download PDFInfo
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- CN1971692A CN1971692A CNA2006101417173A CN200610141717A CN1971692A CN 1971692 A CN1971692 A CN 1971692A CN A2006101417173 A CNA2006101417173 A CN A2006101417173A CN 200610141717 A CN200610141717 A CN 200610141717A CN 1971692 A CN1971692 A CN 1971692A
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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
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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
- G09G3/292—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 reset discharge, priming discharge or erase discharge occurring in a phase other than addressing
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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
A plasma display panel driving device comprises a rise slope waveform supply unit which supplies a rise slope waveform with multiple different slopes during rise time of resetting period, and a fall slop waveform supply unit which supplies a fall slope waveform with multiple different slopes during fall time of resetting period. A plasma display panel driving method comprises a stage of supplying a rise slope waveform with multiple different slopes during rise time of resetting period, and a stage of supplying a fall slope waveforms with multiple different slopes during fall time of resetting period. The invention can generates a rise slope waveform with multiple different slopes and a fall slope waveform with multiple different slopes, thereby can perform a stable weak discharge operation and increase discharge characteristic. Meanwhile, the slope of portions failed to perform weak discharge in the rise slope waveform and in the fall slope waveform is larger than the slope of portions which perform weak discharge, absolute lightness, scanning time and luminance representation are increased.
Description
Technical field
The present invention is the relevant invention of Plasmia indicating panel (Plasma Display Panel: be designated hereinafter simply as PDP) drive unit and method, particularly about adjusting the PDP drive unit and the method for (reset period) length during reset (Reset).
Background technology
Original interchange shape face discharge PDP is in order to embody the briliancy of portrait, a frame (Frame) is divided into the different a plurality of subdomains (sub-field) of number of light emission times carries out the timesharing driving, at this moment, each subdomain (sub-field) is selected to carry out during reset (Reset) of full frame initial stageization and scanning (Scan) row (Line), during the scanning of selection (Scan) is gone during the addressing (address) that is divided into selection cell (cell) in (Line) and embodied the keeping of briliancy (Sustain) according to discharge time.
Fig. 1 is the drive waveforms synoptic diagram that supplies to the PDP of two subdomains (sub-field).Show the signal Y supply in the scan electrode among the figure, supply to the signal of keeping in (Sustain) electrode (Z) and supply to signal X in addressing (Address) electrode.
With reference to Fig. 1, during each subdomain (sub-field) is divided into reset (Reset), during the addressing (Address) and keep during (Sustain), in during the rising edge during reset (Reset), import rising ramp waveform Ramp-up among all scan electrode Y simultaneously, faint discharge (being designated hereinafter simply as weak discharge) takes place in the cell (cell) of full frame according to this rising ramp waveform, therefore, generate the wall electric charge in the cell (cell).After supplying with rising ramp waveform Ramp-up during the negative edge, be lower than the decline ramp waveform Ramp-down that descends in the positive polarity voltage of rising ramp waveform Ramp-up the highest (peak) voltage and be input to simultaneously among the scan electrode Y.Faint elimination discharge (being designated hereinafter simply as weak discharge) takes place in decline ramp waveform Ramp-down in cell (cell), wall electric charge that the rising edge discharge is generated and the electric charge that do not need in the space charge are eliminated, and can carry out the wall electric charge that needs in addressing (Address) discharge residual uniformly in the cell of full frame.When the pulse of negative polarity scanning Scan voltage is input to scan electrode Y successively in during the addressing (Address), input positive polarity data data pulse in addressing electrode X, the wall voltage that generates during the voltage difference of this scanning impulse and data pulse and reset (Reset) is deepened, therefore, data pulse is input to addressing (Address) discharge takes place in the cell (cell).Keep during (Sustain) interscan electrode Y and keep the pulse sus that voltage is kept in the input that replaces among (Sustain) electrode Z.
As mentioned above, original PDP driving method is the wall electric charge that utilizes during the addressing (Address) in order to be formed on, resetting all needs in each subdomain (sub-field) during (Reset), at this moment, for common weak discharge takes place during the rising edge during reset (Reset) and during the negative edge, the slope of rising ramp waveform Ramp-up or decline ramp waveform Ramp-down will be guaranteed to some extent, therefore, original PDP driving method is to exist to reduce the time that takies during reset (Reset) in each subdomain (sub-field) problem of gauge is arranged during ratio, and, increase during the rising edge (set-up) or during the negative edge (set-down) and have influence on and keep guaranteeing of (sustain) is interval and addressing (Address) is interval time, also be accompanied by the absolute briliancy minimizing of set, problems such as the minimizing of scanning scan time and briliancy performance.
Summary of the invention
For addressing the above problem, the purpose of this invention is to provide the rising oblique wave pulse that whether has mutual Different Slope that during reset (Reset), takes place and have the PDP drive unit and the method for the decline oblique wave pulse generation of Different Slope according to weak discharge.
In order to address the above problem, the present invention adopts following scheme to realize:
Plasma display panel drive device is included in the rising ramp waveform supply units of supplying with a plurality of rising ramp waveform with Different Slope during the rising edge during reset (Reset) and supplies with a plurality of decline ramp waveform supply units with decline ramp waveform of Different Slope during the negative edge during above-mentioned the resetting (Reset).
Aforesaid plasma display panel drive device, it is characterized in that time in above-mentioned rising ramp waveform or the above-mentioned decline ramp waveform go up forward slope ratio on the time subsequently slope more steep.
Aforesaid plasma display panel drive device is characterized in that on the above-mentioned time in the slope subsequently weak discharge taking place.
Aforesaid plasma display panel drive device, it is characterized in that it comprises that also above-mentioned rising ramp waveform supply unit checks the level (Level) of above-mentioned rising ramp waveform, outgoing inspection result's the 1st level (Level) inspection portion and determine the 1st slope determination section of the above-mentioned rising ramp waveform of slope ground supply according to the check result of above-mentioned the 1st level (Level) inspection portion output.
Aforesaid plasma display panel drive device, it is characterized in that above-mentioned the 1st slope determination section comprise level (Level) above-mentioned inspection and the 1st reference level (Level) relatively the 1st comparing section and according to being the decision of the slope of above-mentioned rising ramp waveform the 1st or the 2nd slope behind relatively the result in above-mentioned the 1st comparing section, constitute the 1st waveform generating unit with the above-mentioned rising ramp waveform of decision slope ground generation.
Aforesaid plasma display panel drive device is characterized in that the 1st reference level (Level) is variable.
Aforesaid plasma display panel drive device, it is characterized in that it comprises that also above-mentioned decline ramp waveform supply unit checks the level (Level) of above-mentioned decline ramp waveform, outgoing inspection result's the 2nd level (Level) inspection portion and decide the 2nd slope determination section of the above-mentioned decline ramp waveform of slope ground supply according to the check result of above-mentioned the 2nd level (Level) inspection portion output.
Aforesaid plasma display panel drive device, it is characterized in that above-mentioned the 2nd slope determination section comprise level (Level) above-mentioned inspection and the 2nd reference level (Level) relatively the 2nd comparing section and according to being the decision of the slope of above-mentioned decline ramp waveform the 3rd or the 4th slope behind the comparative result in above-mentioned the 2nd comparing section, constitute the 2nd waveform generating unit with the above-mentioned decline ramp waveform of decision slope ground generation.
Aforesaid plasma display panel drive device is characterized in that above-mentioned the 2nd reference level (Level) is variable.
The Plasmia indicating panel driving method comprises the stage of supplying with the decline ramp waveform of a plurality of Different Slope during stage of the rising ramp waveform of supplying with a plurality of Different Slope during the rising edge during reset (Reset) and the negative edge during above-mentioned the resetting (Reset).
As mentioned above, the invention has the beneficial effects as follows:
1. the rising ramp waveform that has a plurality of slopes has the decline ramp waveform of a plurality of slopes, therefore, can carry out the weak discharge running of stability, improves flash-over characteristic.
2. the slope that the weak discharge part does not take place in rising ramp waveform and the decline ramp waveform is greater than the slope that the weak discharge part takes place, reduce shared time ratio during reset (Reset) of each subdomain (sub-field), an absolute brightness that increases set of keeping in interval (sustain) and addressing (Address) interval, increase scanning (scan) time, improve the briliancy performance.
3. can freely adjust a plurality of slopes in rising ramp waveform and the decline ramp waveform, carry out the coupling of flash-over characteristic easily.
4. variable in the 1st and the 2nd reference level (Level), have the effect that can freely change the point of inflection that slope changes.
Description of drawings
Fig. 1 is the drive waveforms synoptic diagram that supplies to the PDP of two subdomains (sub-field).
Fig. 2 is the summary Block figure of plasma display panel drive device of the present invention.
Fig. 3 (a) reaches (b) for the oscillogram of plasma display drive apparatus of the present invention and method is described.
Fig. 4 (a) reaches and (b) is the original Plasmia indicating panel driving method oscillogram of explanation.
Fig. 5 is a kind of effective embodiment circuit diagram of rising ramp waveform supply unit of the present invention shown in Figure 2.
Fig. 6 (a) reaches and (b) is the key diagram that determines the running of the 1st slope shown in Fig. 3 (a).
Fig. 7 (a) reaches and (b) is the key diagram that determines the running of the 2nd slope shown in Fig. 3 (a).
Fig. 8 is a kind of effective embodiment circuit diagram of decline ramp waveform supply unit of the present invention shown in Figure 2.
Fig. 9 is the routine display circuit figure of actual embodiment of rising ramp waveform supply unit of the present invention shown in Figure 5.
Figure 10 is the rising ramp waveform display waveform figure that takes place according to rising ramp waveform supply unit shown in Fig. 9.
Embodiment
Followingly be elaborated with reference to accompanying drawing.
Fig. 2 is the summary Block figure of plasma display panel drive device of the present invention.Comprise rising ramp waveform supply unit 10 and decline ramp waveform supply unit 12.
A plurality of rising ramp waveform with Different Slope take place in the rising ramp waveform supply unit 10 of plasma display drive apparatus of the present invention during the rising edge during reset (Reset), the rising ramp waveform that takes place is exported by output terminal OUT by panel capacitance Cp, for this reason, rising ramp waveform supply unit 10 can be replied the rising ramp waveform that rises with till the level (Level) of the rising edge voltage Vset_up of set-up signal, and the panel capacitance Cp here is the static capacity of display panel of equal value.
A plurality of decline ramp waveform with Different Slope take place in decline ramp waveform supply unit 12 during the negative edge during reset (Reset), the decline ramp waveform that takes place is exported by panel capacitance Cp output terminal OUT, for this reason, decline ramp waveform supply unit 12 can be replied the decline ramp waveform that descends till negative edge voltage-Vy level (Level) with the set-down signal.For improving for the understanding of the present invention, supposed that rising ramp waveform and decline ramp waveform respectively have two slopes plasma display drive apparatus of the present invention and method are described, but the present invention is not limited to this.
Fig. 3 (a) reaches (b) for the oscillogram of plasma display drive apparatus of the present invention and method is described.What Fig. 3 (a) showed is the oscillogram that supplies to the signal in the scanning scan electrode, and what Fig. 3 (b) showed is photooscillogram.
Rising ramp waveform supply unit 10 shown in Figure 2 shown in Fig. 3 (a), t during the rising edge of RSP (ReSet Period) during reset (Reset)
1+ t
2Rising ramp waveform S1 and S2 with 2 Different Slope, the rising ramp waveform that takes place is exported by panel capacitance Cp output terminal OUT, at this moment, can know that the rising ramp waveform shown in Fig. 3 (a), rises to till the rising edge voltage Vset_up.Decline ramp waveform supply unit 12 shown in Fig. 3 (a), t during the negative edge of RSP during reset (Reset)
3+ t
4Decline ramp waveform S3 and S4 with 2 Different Slope, the decline ramp waveform of generation is exported by panel capacitance Cp output terminal OUT, at this moment, can know that the decline ramp waveform drops to till negative edge voltage-Vy shown in Fig. 3 (a).According to the present invention, to go up forward slope S 1 steeper than subsequently slope S 2 on the time time in the rising ramp waveform shown in Fig. 3 (a), identical therewith, to go up forward slope S 3 steeper than subsequently slope S 4 on the time time in the decline ramp waveform shown in Fig. 3 (a), because weak discharge can take place in a side on the time subsequently, that is, compared with the time t shown in Fig. 3 (b)
1Slower time t
2The middle weak discharge 30 that takes place is compared with t
3Slower time t
4In weak discharge 32 also takes place.Here, in order to carry out stable weak discharge 30 and 32, time t
2More than during being set at that weak discharge 30 takes place, time t
4More than during being set at that weak discharge 32 takes place.
Fig. 4 (a) reaches and (b) is the original Plasmia indicating panel driving method oscillogram of explanation.What Fig. 4 (a) showed is the signal waveforms that supplies in the scanning scan electrode, and what Fig. 4 (b) showed is photooscillogram.
Original situation is, shown in Fig. 4 (a), the rising ramp waveform has a slope S ru, and the decline ramp waveform also has a slope S rd, at this moment, and the time t shown in the Fig. 3 that weak discharge 30 and 32 do not take place (a) shown in Fig. 3 (b)
1And t
3Compared with the time t shown in 50 and 52 the Fig. 4 (b) that weak discharge does not take place shown in Fig. 4 (a)
5And t
6Time t can be reduced
1And t
3Compared with time t
5And t
6Reduce, therefore, the shared ratio of RSP can reduce during reset in each subdomain (sub-field) (Reset), the time utilization of minimizing during the addressing (Address) and in keeping during (sustain).
Fig. 5 is a kind of effective embodiment circuit diagram of rising ramp waveform supply unit of the present invention shown in Figure 2.Comprise the 1st level (Level) inspection portion 60, the 1 slope determination sections 62, diode D1 and D2, resistance R 7 and R8 and capacitor C 1.
The 1st level (Level) inspection portion 60 shown in Figure 5 checks the level (Level) of rising ramp waveform, the result who checks is outputed to the 1st slope determination section 62, the 1st level (Level) inspection portion 60 distributes the level (Level) of rising ramp waveform for this reason, and the level (Level) that the allocation result V1 of following mathematical formulae 1 is checked as the rising ramp waveform outputs to the 1st slope determination section 62.
Mathematical formulae 1:
What here, Vout showed is the rising ramp waveform that occurs to panel capacitance Cp.
According to embodiments of the invention, resistance R 3 and the R4 that is connected between rising edge set-up voltage Vset_up and the panel capacitance Cp can be presented as in the 1st level (Level) inspection portion 60.The 1st slope determination section 62 has the result who checks according to the 1st level (Level) inspection portion 60 and determines the rising ramp waveform of slope to supply among the panel capacitance Cp, for this reason, the 1st slope determination section 62 comprises the 1st comparing section and the 1st waveform generating unit 82, here, the 1st comparing section level (Level) that the 1st level (Level) inspection portion 60 is checked and the 1st reference level (Level) Vref1 compare the back result who compares are outputed to the 1st waveform generating unit 82.The 1st waveform generating unit 82 is the decision of the slope of rising ramp waveform the 1st or the 2nd slope according to the result who compares in the 1st comparing section, has the rising ramp waveform of slope.For this reason, the 1st waveform generating unit 82 can be presented as transistor (Transistor) Q1 and Q2, resistance R 1, R2, R5 and R6 and mos field effect transistor (MOSFET:Metal Oxide Semiconductor Field Effect Transistor) T1.Transistor (Transistor) Q1 has collector (Collector) and the emitter that connects between set-up signal and resistance R 1 one sides, electricity group R5 is connected in the base stage (Base) of comparative result in the comparer, transistor (Transistor) Q2 has emitter and the collector (Collector) that connects between set-up signal and resistance R 2 one sides, and resistance R 6 is connected in the base stage (Base) of comparative result in the comparer.Transistor among Fig. 5 (Transistor) Q1 is NPN transistor (Transistor), and transistor (Transistor) Q2 is PNP transistor (Transistor), but the present invention not only is confined to this.
Fig. 6 (a) reaches and is that (b) it (b) is the key diagram that the 2nd slope S 2 operates that determines shown in Fig. 3 (a) that the key diagram that determines 1 running of the 1st slope S shown in Fig. 3 (a), Fig. 7 (a) reach.At first, level (Level) V1 that the rising ramp waveform is checked is during less than the 1st reference level Vref1, according to the comparative result in the comparer, transistor (Transistor) Q2 opens (turn-on), transistor (Transistor) Q1 closes (turn-off), through the current path of the direction of arrow 100 of transistor Q2 and resistance R 2 shown in Fig. 6 (a) and form, then, mirror capacitor C 1 is discharged by resistance R 2 and the slope running is taken place, at this moment, according to the slope S 1 of variable resistor R2 decision rising ramp waveform, the rising ramp waveform 102 of slope S 1 with decision is shown in Fig. 6 (b) and take place.But, level (Level) V1 that the rising ramp waveform is checked is during greater than the 1st reference level Vref1, according to comparer result relatively, transistor (Transistor) Q1 opens (turn on), after transistor (Transistor) Q2 closes (Turn off), through the current pathway of the direction of arrow 110 of transistor (Transistor) Q1 and resistance R 1 according to shown in Fig. 7 (a) and form, then, mirror capacitor C 1 is used resistance R 1 substitutional resistance R2, discharge and produce slope running by electricity group R1, this situation, slope S 2 according to variable resistor R1 decision rising ramp waveform, the rising ramp waveform 112 of slope S 2 with decision is shown in Fig. 7 (b) and take place, at this moment, for the slope of the rising ramp waveform 102 shown in Fig. 6 (b) greater than rising ramp waveform 112 slopes shown in Fig. 7 (b), therefore, the size that the size of resistance R 2 is set at less than resistance R 1 gets final product.The 1st reference level (Level) Vref1 is variable according to the present invention, and in like manner adjusting the 1st reference level Vref1 can change the point of inflection of slope S 1 and S2 change.
Fig. 8 is a kind of effective embodiment circuit diagram of decline ramp waveform supply unit of the present invention shown in Figure 2.Comprise the 2nd level (Level) inspection portion 140, the 2 slope determination sections 142, diode D3 and D4, resistance R 16 and R15 and capacitor C 2.
The 2nd level (Level) inspection portion 140 shown in Figure 8 checks the level (Level) of decline ramp waveform, check result is outputed to the 2nd slope determination section 142, for this reason, the 2nd level (Level) inspection portion 140 distributes the level of decline ramp waveform (Level), outputs in the 2nd slope determination section 142 as the inspection level of decline ramp waveform as the allocation result V2 of mathematics formula 2.
Mathematical formulae 2:
According to the present invention, resistance R 11 and the R12 that connects between panel capacitance Cp and the negative edge set-down voltage-Vy can be presented as in the 2nd level (Level) inspection portion 140.The 2nd slope determination section 142 supplies among the panel capacitance Cp according to the decline ramp waveform that the decision slope takes place the check result in the 2nd level (Level) the inspection portion 140, for this reason, the 2nd slope determination section 142 comprises the 2nd comparing section 150 and the 2nd waveform generating unit 152, here, the 2nd comparing section 150 compares level (Level) and the 2nd reference level Vref2 that checks in the 2nd level (Level) the inspection portion 140, and result is relatively outputed to the 2nd waveform generating unit 152.The 2nd waveform generating unit 152 is the decision of the slope of decline ramp waveform the 3rd or the 4th slope according to the result who compares in the 2nd comparing section 150, has the decline ramp waveform of slope.For this reason, the 2nd waveform generating unit 152 can be presented as transistor (Transistor) Q3 and Q4, resistance R 9, R10, R13 and R14 and mos field effect transistor (MOSFET:Metal Oxide Semiconductor Field Effect Transistor) T2.Transistor (Transistor) Q3 is connected in collector (Collector) and the emitter between set-down signal and resistance R 9 one sides, resistance R 13 is connected in the base stage (Base) of comparative result in the comparer 150, transistor (Transistor) Q4 is connected in collector (Collector) and the emitter between set-down signal and resistance R 10 1 sides, resistance R 14 is connected in the base stage (Base) of comparative result in the comparer 150, transistor among Fig. 8 (Transistor) Q3 is NPN transistor (Transistor), transistor (Transistor) Q4 is PNP transistor (Transistor), but the present invention not only is confined to this.
During with reference to Fig. 3 (a), at first, level (Level) V2 that the decline ramp waveform is checked is during less than the 2nd benchmark electricity (Level) Vref2, according to the comparative result in the comparer 150, transistor (Transistor) Q4 opens (turn-on), transistor (Transistor) Q3 closes (turn-off), at this moment, slope S 3 according to variable resistor R10 decision decline ramp waveform, the decline ramp waveform that can have decision slope S 3, promptly, the resistance value of adjusting variable resistor R10 changes slope S 3, but, level (Level) V2 that the decline ramp waveform is checked is during greater than the 2nd reference level (Level) Vref2, according to comparer 150 result relatively, transistor (Transistor) Q3 opens (turn-on), transistor (Transistor) Q4 closes (turn-off), at this moment, slope S 4 according to variable resistor R9 decision decline ramp waveform, the decline ramp waveform that can have decision slope S 4, promptly, the resistance value of adjusting variable resistor R9 changes slope S 4, according to the present invention, the 2nd reference level Vref2 is variable, in like manner, can adjust the 2nd reference level Vref2 changes the point of inflection of slope S 3 and S4 change.
Fig. 9 is the routine display circuit figure of actual embodiment of rising ramp waveform supply unit of the present invention shown in Figure 5.Voltage V8 is equivalent to set-up signal shown in Figure 5, and voltage V7 is equivalent to set-up voltage shown in Figure 5.
Figure 10 is the rising ramp waveform display waveform figure that takes place according to rising ramp waveform supply unit shown in Fig. 9.The longitudinal axis is represented voltage, the transverse axis express time.Can recognize middle rising ramp waveform during the rising edge shown in Figure 10 with two Different Slope.
The present invention announces as above with preferred embodiment that all technical schemes that mode obtained such as equivalence replacement or equivalents of taking all drop in protection scope of the present invention.
Claims (10)
1, plasma display panel drive device is included in the rising ramp waveform supply units of supplying with a plurality of rising ramp waveform with Different Slope during the rising edge of reseting period and supplies with a plurality of decline ramp waveform supply units with decline ramp waveform of Different Slope during the negative edge of above-mentioned reseting period.
2, plasma display panel drive device according to claim 1, it is characterized in that time in above-mentioned rising ramp waveform or the above-mentioned decline ramp waveform go up forward slope ratio on the time subsequently slope more steep.
3, plasma display panel drive device according to claim 2 is characterized in that on the above-mentioned time in the slope subsequently weak discharge taking place.
4, plasma display panel drive device according to claim 1, it is characterized in that it comprises that also above-mentioned rising ramp waveform supply unit checks the level of above-mentioned rising ramp waveform, outgoing inspection result's the 1st level inspection portion and determine the 1st slope determination section of the above-mentioned rising ramp waveform of slope ground supply according to the check result of above-mentioned the 1st level inspection portion output.
5, plasma display panel drive device according to claim 4, it is characterized in that above-mentioned the 1st slope determination section comprises the 1st comparing section of the level of above-mentioned inspection and the 1st reference level comparison and according to behind the result who compares in above-mentioned the 1st comparing section slope of above-mentioned rising ramp waveform being determined to be the 1st or the 2nd slope, constituting having the 1st waveform generating unit that above-mentioned rising ramp waveform takes place on decision slope ground.
6, plasma display panel drive device according to claim 5 is characterized in that the 1st reference level is variable.
7, plasma display panel drive device according to claim 1, it is characterized in that it comprises that also above-mentioned decline ramp waveform supply unit checks the level of above-mentioned decline ramp waveform, outgoing inspection result's the 2nd level inspection portion and decide the 2nd slope determination section of the above-mentioned decline ramp waveform of slope ground supply according to the check result of above-mentioned the 2nd level inspection portion output.
8, plasma display panel drive device according to claim 7, it is characterized in that above-mentioned the 2nd slope determination section comprises the 2nd comparing section of the level of above-mentioned inspection and the 2nd reference level comparison and according to behind the comparative result in above-mentioned the 2nd comparing section slope of above-mentioned decline ramp waveform being determined to be the 3rd or the 4th slope, constituting having the 2nd waveform generating unit that above-mentioned decline ramp waveform takes place on decision slope ground.
9, plasma display panel drive device according to claim 8 is characterized in that above-mentioned the 2nd reference level is variable.
10, Plasmia indicating panel driving method comprises the stage of supplying with the decline ramp waveform of a plurality of Different Slope during the negative edge of stage of the rising ramp waveform of supplying with a plurality of Different Slope during the rising edge of reseting period and above-mentioned reseting period.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020050091354A KR100744518B1 (en) | 2005-09-29 | 2005-09-29 | Apparatus and method for driving Plasma Display Panel |
| KR1020050091354 | 2005-09-29 |
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| CN1971692A true CN1971692A (en) | 2007-05-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103903554A (en) * | 2014-03-31 | 2014-07-02 | 四川虹欧显示器件有限公司 | Driving method for ramp-up waveforms in reset period of plasma display panel |
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| KR100458581B1 (en) * | 2002-07-26 | 2004-12-03 | 삼성에스디아이 주식회사 | Driving apparatus and method of plasma display panel |
-
2005
- 2005-09-29 KR KR1020050091354A patent/KR100744518B1/en not_active IP Right Cessation
-
2006
- 2006-09-27 CN CNA2006101417173A patent/CN1971692A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103903554A (en) * | 2014-03-31 | 2014-07-02 | 四川虹欧显示器件有限公司 | Driving method for ramp-up waveforms in reset period of plasma display panel |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100744518B1 (en) | 2007-08-01 |
| KR20070036391A (en) | 2007-04-03 |
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