CN100555368C - Plasma display panel device and driving method thereof - Google Patents
Plasma display panel device and driving method thereof Download PDFInfo
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- CN100555368C CN100555368C CNB2005101251972A CN200510125197A CN100555368C CN 100555368 C CN100555368 C CN 100555368C CN B2005101251972 A CNB2005101251972 A CN B2005101251972A CN 200510125197 A CN200510125197 A CN 200510125197A CN 100555368 C CN100555368 C CN 100555368C
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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
- G09G3/293—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 address discharge
Abstract
The invention discloses a kind of plasma display panel device and driving method thereof.This plasma display device comprises: Plasmia indicating panel wherein forms a plurality of electrodes; Energy storage units is used to store the energy that imposes on electrode; And protector, the voltage level that is used for being stored in the energy of energy storage units remains on predetermined voltage range.
Description
Technical field
The present invention relates to plasma display panel device and driving method thereof.
Background technology
Usually, plasma display panel device comprises plasma display panel, and the barrier rib that wherein forms between front panel and the rear panel constitutes single unit.Fill with main discharge gas each unit, such as the mixed gas (Ne+He) of neon (Ne), helium (He) or Ne and He, and the inert gas that comprises small amount of xenon Xe.When making those gas discharges by HF voltage, inert gas produces the fluorophor that forms between vacuum ultraviolet rays and the radiation resistance blend stop, finishes image whereby.
The view of the structure of Fig. 1 is an example common plasma display panel.
In plasma display panel shown in Figure 1, in front in the plate 100, paired scan electrode 102 is placed on the preceding substrate 101 with a plurality of electrode pairs of keeping of keeping electrode 103 formations, be used for display image, in the back in the plate 110, stride across a plurality of a plurality of addressing electrodes 113 of keeping electrode pair and be placed on the meron 111, this front panel 100 and rear panel 110 engage with the interval of regulation parallelly.
Front panel 100 comprises the scanning of paired formation and keeps electrode 102 and 103 so that the discharge and the radiation of holding unit each other in a discharge cell.Each scanning and keep electrode 102 and 103 and comprise transparency electrode ' a ' that constitutes by ITO (indium to tin to oxide) material and the bus electrode ' b ' that constitutes by metal.Scan and keep the one or more dielectric layers 104 of electrode 102 and 103 usefulness and cover, to limit discharge current and to make electrode pair insulated from each other.Protective seam 105 with magnesium oxide (MgO) deposition is formed on the dielectric layer 104 so that promote discharging condition.
The barrier rib 112 of striated or well shape is placed in the rear panel 110 abreast to form a plurality of discharge spaces, just discharge cell.Be parallel to barrier rib 112 and arrange one or more addressing electrodes 113, to cause that by carrying out address discharge the inert gas in the discharge cell produces vacuum ultraviolet rays.In keeping discharge process, be used for RGB fluorophor 114 coatings that visible emitting the comes display image upper surface of plate 110 in the back.Between addressing electrode 113 and fluorophor 114, be formed for protecting the dielectric layer 115 of addressing electrode 113.
Be used to drive the plasma display panel device of above-mentioned plasma display panel, form a plurality of discharge cells, and install and to have the pulse that is used to provide given gets driving circuit to discharge cell driver (not shown) with matrix type.
More specifically, plasma display panel device comprises: be used to produce the controller of control signal, to control plasma display panel according to receiving external image signal; Data driver is used for the control signal by the slave controller generation, provides pulse to addressing electrode; Scanner driver is used to provide pulse to scan electrode with keep driver, is used to provide and keeps pulse to keeping electrode.
On the other hand, according to charging that occurs in the plasma display panel and discharge, the switching manipulation by each driver produces the driving pulse that is used to drive plasma display panel device.As a result of, the energy loss and the temperature that has promoted switching device of plasma display panel device have been increased.Thereby existing plasma display panel device comprises energy recovery circuit, is used to make the energy circulation that is provided to plasma display panel, as shown in Figure 2.
The view of the energy recovery circuit of Fig. 2 is an example existing plasma display panel device.
As shown in Figure 2, energy recovery circuit comprises: as the capacitive load Cp of the load of plasma display panel; Energy storage units, promptly capacitor Cs is used to accumulate the energy that recovers from capacitive load Cp; Be connected capacitor Cs and scanning or keep the inductor L that is used to apply support level Vs between the driver 210; With first and second switch S 1 and the S2, it is connected in parallel between capacitor Cs and the inductance L.Here, keep driver 210 and comprise third and fourth switch S 3 and the S4, it is connected in parallel between capacitive load Cp and the inductor L.
The recovery of top plasma display panel device is described below and utilizes the operation of energy again.
When 1 conducting of first switch S, the voltage Vs/2 that before had been stored among the capacitor Cs is added to capacitive load Cp through inductance L.At this moment, by the L shaped one-tenth resonant circuit of inductor, and therefore be added to capacitive load Cp near the voltage Vs that before was stored in the twice of the voltage among the capacitor Cs of source.
Because 1 conducting of first switch S when 3 conductings of the 3rd switch S, is kept voltage Vs and is added to capacitive load Cp, and in the process of the 3rd switch S 3 conductings, capacitive load Cp keeps keeping voltage Vs.
When second switch S2 conducting while first switch S 1 and 3 shutoffs of the 3rd switch S, the current path that formation is extended from capacitive load Cp to capacitor Cs through second switch S2, and the energy of therefore accumulating in capacitive load Cp is restored to capacitor Cs, whereby in capacitor Cs, the voltage of accumulation Vs/2 is near keeping half of voltage Vs.
When 4 conductings of the 4th switch S and second switch S2 when turn-offing, capacitive load Cp continues discharge till it reaches ground voltage level GND.
Simultaneously, when energy is restored to capacitor Cs, in second switch S2, can break down or short circuit.At this moment, voltage continues to be provided to capacitor Cs by second switch S2, and therefore excessive energy accumulation is in capacitor Cs, makes that thus capacitor Cs is overheated and damages.In addition, owing to damage capacitor Cs, worsened the stability of circuit.
And, among the capacitor Cs under the situation of short circuit, can not cumlative energy in capacitor Cs, thereby increased the power consumption in the plasma display panel device.
Summary of the invention
Thereby, make the present invention at the problems referred to above that occur in the prior art, the purpose of this invention is to provide a kind of plasma display panel device and driving method thereof, it can prevent from promptly to accumulate excessive voltage at energy storage units in capacitor.
Another object of the present invention provides a kind of plasma display panel device and driving method thereof, and it can improve the stability of circuit by the heat and the infringement of suppression device.
Another object of the present invention provides plasma display panel device and driving method thereof, and it can reduce power consumption.
For achieving the above object, according to the present invention, provide a kind of plasma display panel device, comprising: Plasmia indicating panel wherein is formed with a plurality of electrodes; Energy storage units is used to store the energy that is applied to electrode; And protector, the voltage level that is used for being stored in the energy of energy storage units remains on predetermined voltage range.
A kind of plasma display panel device is provided in addition, has comprised: Plasmia indicating panel wherein is formed with a plurality of electrodes; Capacitor is used to store the energy that offers electrode; And comparer, it is connected to capacitor, is used for the voltage level and the predetermined voltage range of comparison capacitor.According to the comparative result of this comparer, turn-off at least one the driving switch device that is connected to capacitor.
Provide a kind of driving to comprise the method for the plasma display panel device of a plurality of electrodes in addition, comprised step: whether the energy that is identified for storing in the capacitor of the energy that offers electrode is maintained on the predetermined voltage range; If with energy outside predetermined voltage range, then stop to drive the operation of a plurality of electrodes.
Plasma display panel device of the present invention can prevent that energy storage units from being the superpotential of having charged in the capacitor.
Plasma display panel device of the present invention can improve the stability of circuit by the heat and the damage of suppression device.
Plasma display panel device of the present invention can reduce power consumption.
Description of drawings
By detailed description below in conjunction with accompanying drawing, can more fully understand other purpose and advantage of the present invention, in the accompanying drawings:
The view of the structure of Fig. 1 is an example existing plasma display panel;
The view of the energy recovering unit of Fig. 2 is an example existing plasma display panel device;
Fig. 3 is an example according to the view of the plasma display panel device of the embodiment of the invention;
Fig. 4 is used to explain according to the energy storage units of the plasma display panel device of the embodiment of the invention and the view of protector;
Fig. 5 is used to explain according to another energy accumulator of the plasma display panel device of the embodiment of the invention and the view of protector;
Fig. 6 has been the example view of plasma display panel apparatus determiner according to an embodiment of the invention; With
Fig. 7 is an example according to the view of voltage hysteresis (hysteresis) characteristic of the energy storage units of the embodiment of the invention.
Embodiment
Now, will be by describing the present invention with reference to the accompanying drawings in conjunction with the preferred embodiments in detail.
According to an aspect of the present invention, plasma display panel device comprises: the Plasmia indicating panel that wherein forms a plurality of electrodes; Be used to store the storage unit of the energy that offers electrode; And protector, the voltage level that is used for energy that energy storage units is stored remains on predetermined voltage range.
Predetermined voltage range is 95% to 105% of a predetermined reference voltage level.
Reference voltage level is to keep half of voltage basically.This reference voltage level is half of addressing voltage basically.
Predetermined voltage range be energy storage units memory capacity 20% to 80%.
Protector comprises determiner, and it is used for determining whether voltage level of energy is in outside the predetermined voltage range, and according to definite result of determiner, stops to be used to provide or to recover operation from the driver of the energy of energy storage units.
Determiner comprises at least one comparer, is used for the voltage level and the predetermined voltage range of comparison energy.
Determiner further comprises compensator, is used for compensating in advance the noise component of the energy that is added to comparer.The energy storage units stored energy is used for driving the scan electrode of a plurality of electrodes or keeps electrode.
The energy storage units stored energy is used for driving the addressing electrode of a plurality of electrodes.
According to another aspect of the present invention, plasma display panel device comprises: the Plasmia indicating panel that wherein forms a plurality of electrodes; Be used to store the capacitor of the energy that offers electrode; With the comparer that is connected to capacitor, be used for the voltage level and the predetermined voltage range of comparison capacitor.According to the comparative result of comparer, turn-off at least one the driving switch device that is connected to capacitor.
Comparer comprises first operational amplifier, is used for voltage level is compared with the mxm. of predetermined voltage range; With second operational amplifier, be used for voltage level is compared with the minimum of predetermined voltage range.。
First or second operational amplifier is connected to feedback resistance.
First or second operational amplifier is connected to the dropping resistor that is used to reduce input voltage.Predetermined voltage range be capacitor builtin voltage 20% to 80%.
Capacitor apply keep voltage in a plurality of electrodes scan electrode or keep electrode.
Capacitor provides addressing voltage to the addressing electrode in a plurality of electrodes.
According to another aspect of the present invention, drive the method for the plasma display panel device comprise a plurality of electrodes, comprise step: whether the energy that is identified for storing in the capacitor of the energy that offers electrode is maintained at predetermined voltage range; If with energy outside predetermined voltage range, stop to be used to drive the operation of a plurality of electrodes.
Capacitor provides keeps voltage to the scan electrode in a plurality of electrodes or keep electrode.
Capacitor provides addressing voltage to the addressing electrode in a plurality of electrodes.
After this, embodiments of the invention will be described with reference to the drawings.
Fig. 3 is an example according to the view of the plasma display panel device of the embodiment of the invention.
As shown in Figure 3, plasma display panel device of the present invention comprises plasma display panel 300, data driver 310, scanner driver 320 and keeps driver 330.
Plasma display panel 300 comprises front panel (not shown) and the meron (not shown) that fits together.On preceding substrate, form scan electrode Y1 to Yn and keep electrode Z, on meron, form the addressing electrode X1 to Xm that strides across scan electrode Y1 to Yn and keep electrode Z.
Data driver 310 applies the addressing electrode X1 to Xm that data form in the plasma display panel 300.In the case, data are meant the image signal data of handling from the image-signal processor (not shown), and image-signal processor is used to handle the picture signal from the outside input.Data driver 310 response is sampled and latch data from the data timing controling signal CTRX that the timing controller (not shown) produces, and the addressing waveforms that will have an addressing voltage Va is applied to addressing electrode X1 to Xm.Data driver 310 according to the embodiment of the invention comprises protector, and it is used for and will offers the addressing voltage Va of addressing electrode X1 to Xm, that is, the voltage level that is stored in the energy in the energy storage units remains on given scope.
Scanner driver 320 drives the scan electrode Y1 to Yn that forms in the plasma display panel 300.The scanning timing controling signal CTRY that response produces from the timing controller (not shown), during the rising cycle of reset cycle, keep voltage Vs and last up voltage Vsetup by combination, scanner driver 320 applies the rising waveform that constitutes the up-wards inclination waveform and arrives scan electrode Y1 to Yn.During the next decline cycle of reset cycle, scanner driver 320 applies the falling waveform that constitutes the decline tilt waveform and gives scan electrode Y1 to Yn.During addressing period, scanner driver 320 sequentially offers scan electrode Y1 to Yn with sweep waveform, this sweep waveform scope from scan reference voltage Vsc to scanning voltage Vy.During the whole scan period, scanner driver 320 offers scan electrode Y1 to Yn and is used to show the waveform of keeping of discharge with at least one, scope from ground voltage level GND to keeping voltage Vs.
Scanner driver 320 according to the embodiment of the invention comprises protector, and it is used for keeping voltage Vs with what be applied to scan electrode Y1 to Yn, that is, the voltage level that is stored in the energy in the energy storage units remains on given range.
Keep driver 330 drive form public electrode in the plasma display panels 300 keep electrode Z.During addressing period, keep the scanning timing controling signal CTRZ that driver 330 responses produce from the timing controller (not shown), the waveform that will have positive bias Vzb is applied to keeps electrode Z.During the cycle of keeping, keep driver 330 and offer and keep electrode Z and keep waveform with at least one that is used to show discharge, its scope from ground voltage level GND to keeping voltage Vs.
The driver 330 of keeping according to the embodiment of the invention comprises protector, its be used for be applied to keep electrode Z keep voltage Vs, promptly be stored in the voltage level of the energy in the energy storage units, remain on given scope.
As mentioned above; plasma display panel device of the present invention comprises energy storage units; it is used to store the energy that offers at least one addressing electrode, scan electrode and keep electrode; also comprise protector, it is used for preventing that the voltage level that is stored in the energy of energy storage units from departing from given scope.
Energy storage units and protector can be contained among each driver 310,320 and 330 arbitrary.And it is interior so that be connected to each electrode that energy storage units and protector can be formed on each driver, or be formed on the outside of driver.To energy storage units and the protector that be connected to electrode be described with reference to Figure 4 and 5.
Fig. 4 has explained according to the energy storage units of the plasma display panel device of the embodiment of the invention and the view of protector.
With reference to figure 4, plasma display panel device of the present invention comprises: plasma display panel Cp; Basically the energy storage units Cs that constitutes by capacitor, it is used for storing at least one the energy that offers a plurality of electrodes that plasma display panel Cp forms; With protector 20, if the voltage at the two ends of energy storage units Cs exceeds predetermined scope, the then operation of its Control Driver remains on predetermined voltage range so that be stored in the voltage level of the energy among the energy storage units Cs.Energy storage units Cs of the present invention and protector 20 storages and control are used for driven sweep or keep the energy of electrode, wherein during the cycle of keeping, keep voltage Vs and are applied to the scanning in the electrode that forms among the plasma display panel Cp or keep electrode.In other words, the driver of Fig. 4 is corresponding to scanner driver shown in Figure 3 320 or keep driver 330.
Plasma display panel device is equipped with energy recovery circuit 10, and it is used for recovering to be stored in the energy of plasma display panel Cp and to utilize it again during the cycle of keeping.As shown in Figure 4, if the voltage at energy storage units Cs two ends exceeds the predetermined reference scope, protector 20 stops to be connected to the operation of the driver of energy storage units Cs, and the energy accumulation that recovers by energy recovery circuit 10 is in this storage unit Cs.
For this reason; protector 20 comprises determiner 21; its voltage that is used to determine whether to be applied to such as the two ends of the energy storage units Cs that is used for circuit devcie of capacitor exceeds predetermined voltage range; and definite result according to determiner 21; stop the switching device be used for providing and recovering the driver of energy, promptly be connected to the operation of switching device of the energy recovery circuit 10 of energy storage units Cs from energy storage units Cs.
Simultaneously, determiner 21 further comprises compensator, and it is used for compensating in advance the noise component of the energy that is provided.To make the description of compensator and comparer with reference to figure 6.
Therefore, according to the control signal that receives from determiner 21, protector 20 stops the operation of the switch of energy recovery circuit 10.Preferably, protector 20 stops the operation of first to fourth switch S 1 to S4, and these switches are operated to stored energy in energy storage units Cs.Because first to fourth switch S 1 to S4 is turned off, the operation that comprises the scanning of energy recovering unit 10 or keep driver is stopped.Stored energy no longer on the two ends of energy storage units Cs then, and the energy that is stored in the energy storage units is discharged.Therefore, the voltage level of energy storage units reduces.
Surpass the highest reference value if be stored in the voltage level of the energy among the energy storage units Cs through protector 20; protector 20 stops the operation of first to fourth switch S 1 to S4, prevents overcharging and eliminating the explosion (exposure) of energy storage units Cs and the infringement to circuit that causes by overcharging of energy storage units Cs whereby.
Be lower than minimum reference value if be stored in the voltage level of energy among the energy storage units Cs, the operation of first to fourth switch S 1 to S4 is stopped, prevent whereby owing to can not correctly recover energy such as the caused energy storage units Cs of the infringement of short circuit, and the energy loss that reduces.
At this moment, according to the characteristic of plasma display panel device, determine to be stored in the normal predetermined voltage range of voltage level of energy among the energy storage units Cs and difference.Preferably, based on the predetermined reference voltage level, predetermined voltage range is greater than 95% with less than 105%.As previously mentioned, Fig. 4 example be used to provide the driver of keeping voltage Vs, and the predetermined reference voltage level is voltage Vs/2, is basically to keep half of voltage Vs.
In other words, because approaching half that keep voltage Vs is stored among the energy storage units Cs, if the voltage level that is stored in the energy among the energy storage units Cs one medium-sizedly surpasses 5% than what keep voltage, then the highest reference value can be set to Vs/2+5%, so that determine that energy is overcharged in energy storage units Cs.Half of voltage Vs is little to surpass 5% if the voltage level that is stored in the energy among the energy storage units Cs is than keeping, and then minimum reference value can be set to Vs/2-5%, damages so determine energy storage units Cs.
In addition, plasma display panel device of the present invention is used to prevent the explosion of the energy storage units Cs that causes because energy overcharges, can the highest reference value be set to energy storage units Cs memory capacity 80%, and minimum reference value be set to energy storage units Cs memory capacity 20%.Therefore, the voltage level of the energy of storing in energy storage units Cs exceeds under the situation of 20% to 80% scope of builtin voltage (pressure) of energy storage units Cs, and the operation of driver can be stopped.
At this moment, it should be noted, according to the characteristic of Plasmia indicating panel and driver, each manufacturer separately standard or driver in the builtin voltage of the device that uses, be used for determining energy storage units Cs is in the highest reference value or the minimum reference value of fault can be different.
Fig. 5 has explained according to another energy storage of the plasma display panel device of the embodiment of the invention and the view of protector.
With reference to figure 5, plasma display panel device of the present invention comprises: Plasmia indicating panel Cp; Basically the energy storage units Cs that constitutes by capacitor, it is used for storing the energy of one of them at least that offers a plurality of addressing electrodes that plasma display panel Cp forms; With protector 20, if the voltage at the two ends of energy storage units Cs exceeds predetermined voltage range, the then operation of its Control Driver is so that the voltage level of the energy of storing among the energy storage units Cs remains on the predetermined voltage range.
50 storages of energy storage units Cs of the present invention and protector and control are used to drive the energy of addressing electrode, wherein at the addressing period device, addressing voltage Va are applied to the addressing electrode in the electrode that forms among the plasma display panel Cp.In other words, the driver of Fig. 4 is corresponding to data driver shown in Figure 3 310.Therefore, plasma display panel device of the present invention recovers the addressing voltage Va that is applied at the addressing period device and utilizes it again, reduces the stress of power attenuation and driver whereby, the voltage level of the energy of storing among the protector 50 control energy storage unit Cs.
Surpass the highest reference value if be stored in the voltage level of the energy among the energy storage units Cs through protector 50; protector 50 stops the operation of first to fourth switch S 1 to S4, thereby prevents overcharging and eliminating explosion and because the caused damage to circuit that overcharges of energy storage units Cs of energy storage units Cs.If the energy voltage level that is stored among the energy storage units Cs is lower than minimum reference value; protector 50 stops the operation of first to fourth switch S 1 to S4; thereby prevent owing to can not correctly recover energy, and reduce energy loss such as the caused energy storage units Cs of the infringement of short circuit.
And, can be based on voltage Va/2, half of addressing voltage Va judges that the voltage level of the energy of storing among definite energy storage units Cs is normal predetermined voltage range.If the voltage level that is stored in the energy among the energy storage units Cs surpasses 5% greater than half of addressing voltage, then the highest reference value can be set to Vs/2+5%, so that determine that energy is overcharged in energy storage units Cs.If be stored in the voltage level of the energy among the energy storage units Cs half little surpassing in 5% than addressing voltage Vs, then minimum reference value can be set to Vs/2-5%, so that determine that energy storage units Cs is damaged.And, the voltage range that can be scheduled to be set to energy storage units Cs memory capacity 20% to 80%.
Fig. 6 example the determiner 21 shown in the Figure 4 and 5 and 51 structure.
Now will be in conjunction with describing according to determiner 21 shown in the Figure 4 and 5 of the embodiment of the invention and 51 structure with reference to figure 6.
Each determiner 21 and 51 comprises a plurality of comparer Amp1 to Amp2, is used to determine whether that the voltage that is applied to capacitor Cs two ends exceeds the predetermined reference value.In other words, comparer comprises the first operational amplifier A mp1, and it is used to determine whether that the voltage of capacitor Cs is greater than the highest reference value; With the second operational amplifier A mp2, be used to determine whether that the voltage of source capacitor Cs is less than minimum reference value.In an embodiment of the present invention, although determiner comprises the comparer that uses operational amplifier, can constitute various types of determiners by using various circuit devcies.
To be added to the anode (+) of the first operational amplifier A mp1 as the highest reference voltage of chargeable voltage in capacitor Cs, and the voltage that charges among the capacitor Cs will be added to its negative terminal (-).
At this moment, be higher than the highest reference voltage that is added to anode (+), then first operational amplifier A mp1 output low signal if be input to the voltage at the capacitor Cs two ends of negative terminal (-).
Usually, owing to use high voltage greater than 170V, apply greater than the high voltage of 80V voltage as the energy of storing among the capacitor Cs as keeping voltage Vs.Like this, the reference voltage that is applied to anode (+) must increase.Yet circuit is worked under high voltage and is caused circuit stability to reduce, and increases power consumption.Therefore, the input end with a plurality of dropping resistor R1 to R5 are connected to comparer Amp1 to Amp2 reduces from the voltage of capacitor Cs input with this.Thereby preferably, the high resistance that uses K Ω is as first resistor R 1 that is connected to capacitor Cs, but the scope of resistance is not limited thereto.
And, owing to the voltage level of the energy of storing among the capacitor Cs has been descended, not to use high voltage, but use the highest reference voltage that is input to anode (+) with the 1 proportional low-voltage conduct of first resistance R by first resistance R 1.
For example, if the resistor of 220K Ω is used as first resistance R 1, and allow the highest reference voltage of capacitor Cs to be set near 150V, the low-voltage that then can apply 1/10 reference voltage is to anode (+).In other words, according to the circuit structure of determiner, the conduct that the is applied voltage of high reference voltage is variable.
Therefore, be higher than the highest reference voltage if be input to the voltage of capacitor Cs of the negative terminal (-) of the first operational amplifier A mp1, the first operational amplifier A mp1 exports low signal, and if the voltage of capacitor Cs is lower than the highest reference voltage, the first operational amplifier A mp1 exports high signal.
On the contrary, in order to determine whether that stored voltage exceeds minimum reference value among the capacitor Cs, minimum reference voltage is added to the negative terminal (-) of the second operational amplifier A mp2, and charging voltage is added to its anode (+) among the capacitor Cs.
Be lower than minimum reference voltage if be input to the voltage of capacitor Cs of the anode (+) of the second operational amplifier A mp2, the second operational amplifier A mp2 exports low signal, if be higher than the voltage of minimum reference value and charged in capacitor Cs, the second operational amplifier A mp2 exports high signal.
At this moment, a plurality of resistors can be connected between the capacitor Cs and the second operational amplifier A mp2, so that can under low-voltage, drive determiner, and can be provided for applying the independent end that reference voltage is given the first and second operational amplifier A mp1 and Amp2, so that stored voltage among the capacitor Cs is compared with the highest and minimum reference voltage.Yet, on the other hand, as shown in Figure 6, can pass through regulating resistor R3 to R5, the highest and minimum reference voltage that is applied to first and second operational amplifiers is set.
Determiner further comprises switching device S5, such as PNP transistor or NPN transistor, if be high from the output signal of the first and second operational amplifier A mp1 and Amp2 output, it is conducting, if and output signal is low,, export the high signal of 5V by by short circuit.
When the first or second operational amplifier A mp1 or Amp2 output low signal, show that capacitor C s has fault.Therefore, if any one output low signal of the first and second operational amplifier A mp1 and Amp2, not conducting of switching device S5.The output terminal of general-purpose operation amplifier has open-collector structure.Under the output of the first and second operational amplifier A mp1 and Amp2 was linked at together situation, low if the output of one of them of comparer becomes, low signal was added to switching device S5, thus stopcock device S5.On the contrary, have only output when two comparers all to become when high, high signal is added to switching device S5, makes switching device S5 be switched on.
If switching device S5 turn-offs, determiner output has the control signal of high value, and it shows that the voltage level of the energy of storing among the capacitor Cs exceeds predetermined voltage range.On the contrary, if switching device S5 conducting, then determiner output has the control signal of low value, and it shows that the voltage level that is stored in the energy among the capacitor Cs is in predetermined voltage range.
According to the result of comparer, at least one driving switch device that is connected to capacitor Cs is turned off.In other words, if export the control signal with high value from determiner, the switching device S1 to S5 in the energy recovery circuit is turned off, thereby and stops to apply voltage to capacitor Cs.
At this moment, control signal with high value can be applied to all switch S 1 to S4, make it possible to stop the operation of all switch S 1 to S4 of energy recovering unit, or be applied to the second or the 3rd switch S 2 or S3, make it possible to only stop the operation of the second or the 3rd switch S 2 or S3.
In the determiner of this structure, although the voltage level of the energy of storing among the capacitor Cs of source is maintained in the normal range, if but be applied to comparer Amp1 to Amp2 voltage level since circuit in noise increase instantaneously or reduce, the output step-down of comparer so, and the operation of energy recovery circuit can be stopped.
Yet, for prevent capacitor Cs as above normal running but in the capacitor stored voltage because under the situation of the instantaneous increase of peak noise or minimizing, the operation of energy recovery circuit is prevented from, and determiner comprises compensator, for example, the first or second feedback resistor R
F1Or R
F2, it is used for compensating in advance the noise component of energy.
As the first or second feedback resistor R
F1Or R
F2When being connected to comparer Amp1 to Amp2,,, keep the output of comparer constant whereby by feedback resistor comfort noise component even the voltage level of the energy of storing among the capacitor Cs becomes and instantaneously is higher than mxm. or is lower than minimum.
The first feedback resistor R
F1Be connected to the first operational amplifier A mp1.Under the situation of the instantaneous increase of voltage level of the energy of storing in capacitor Cs, voltage compensation comes across the first operational amplifier A mp1 and has applied the anode (+) of high reference voltage, the height output that keeps the first operational amplifier A mp1 whereby.
The second feedback resistor R
F2Be connected to the second operational amplifier A mp2.If the voltage level of the energy of storing among the capacitor Cs becomes instantaneous minimizing, voltage compensation comes across the anode (+) that the second operational amplifier A mp2 has applied minimum reference voltage, keeps the height output of the second operational amplifier A mp2 whereby.
In an embodiment of the present invention, although described such structure, i.e. feedback resistance R wherein
F1To R
F2Be connected respectively to the anode (+) of comparer Amp1 to Amp2, but the comparator terminal that is connected to feedback resistor is not limited thereto, can be according to the preferential selection of circuit designers, the feedback resistor of the negative terminal (-) by connecting comparer disposes determiner.
Fig. 7 is an example according to the view of the voltage hysteretic characteristic of the energy storage units of the embodiment of the invention.
As shown in Figure 7, determiner shown in Figure 6 can be configured in this way prevent that noise from changing the output of determiner.In the case, unsettled zone is the voltage level when the voltage level of the energy of storing in the capacitor exceeds predetermined voltage range.Determine the voltage level of capacitor when determiner and be in the predetermined voltage range that in the time of promptly in the stabilized zone, the control signal of generation is low output.Determine the voltage level of capacitor when determiner and exceed predetermined voltage range that promptly during unstable region, the control signal of generation is high output.If the voltage level of capacitor is owing to the instantaneous unstable region that enters of noise, feedback resistor has hysteretic characteristic, is used for high output of low output compensation, exports to prevent that the instantaneous output of determiner is high after the low output of continuous output.
Therefore, determiner of the present invention has prevented that its control signal from owing to noise is changed, having determined the voltage level of capacitor reliably, has improved the stability of driver whereby.
Particularly, the capacitor that the protector of this plasma display device can be used on power circuit to be disposed, it is used to provide keeps voltage Vs or addressing voltage Va.
For example; protector is connected at scanner driver or a plurality of capacitors that provide on the driver is provided; it is used to provide keeps voltage Va to scan electrode or keep electrode, and a plurality of capacitors that provide on the drive plate perhaps are provided, and it is used to provide addressing voltage Va to addressing electrode.If the voltage at capacitor two ends exceeds admissible term of reference, then stop the operation of drive plate.This has prevented plasma display panel device because superpotential of charging in the capacitor and the caused damage of high voltage that is applied to electrode, and be not stored in the capacitor and under the situation of its leakage at electric charge, stop to be used to providing the operation of the driver of power, stably drive this driver whereby.
As mentioned above, this plasma display device capacitor of every type going for providing on the driver.
Although described the present invention with reference to specific embodiment, the present invention is not subjected to the restriction of embodiment, and only is limited by the appended claims.Be noted that those skilled in the art can change or revise embodiment under situation about not departing from the scope of the present invention with spirit.
Claims (19)
1. plasma display panel device comprises:
Plasmia indicating panel wherein is formed with a plurality of electrodes;
Energy storage units, it is used to store the energy that imposes on this electrode; With
Protector, its voltage level that is used for being stored in the energy of this energy storage units remains on predetermined voltage range,
Wherein this protector comprises determiner, and this determiner is used for determining whether the voltage level of this energy is higher than the mxm. of this predetermined voltage range, and whether the voltage level of this energy is lower than the minimum of this predetermined voltage range.
2. plasma display panel device as claimed in claim 1 should predetermined voltage range be 95% to 105% of a preset reference voltage level wherein.
3. plasma display panel device as claimed in claim 2, wherein this reference voltage level is to keep half of voltage basically.
4. plasma display panel device as claimed in claim 2, wherein this reference voltage level is half of addressing voltage basically.
5. plasma display panel device as claimed in claim 1, wherein should predetermined voltage range be energy storage units memory capacity 20% to 80%.
6. plasma display panel device as claimed in claim 1, wherein this protector is according to the determining of this determiner, stops to be used to provide or to recover operation from the driver of the energy of energy storage units.
7. plasma display panel device as claimed in claim 6, wherein this determiner comprises at least one comparer, it is used for the voltage level and the predetermined voltage range of comparison energy.
8. plasma display panel device as claimed in claim 7, wherein this determiner further comprises compensator, it is used for compensating in advance the noise component of the energy that offers comparer.
9. plasma display panel device as claimed in claim 1, wherein this energy storage units is stored the energy that is used for driving the scan electrode of a plurality of electrodes or keeps electrode.
10. plasma display panel device as claimed in claim 1, wherein the storage of this energy storage units is used for driving the energy of the addressing electrode of a plurality of electrodes.
11. a plasma display panel device comprises:
Plasmia indicating panel wherein is formed with a plurality of electrodes;
Capacitor, it is used to store the energy that offers electrode; With
Comparer, it is connected to this capacitor, is used for the voltage level and the predetermined voltage range of comparison capacitor;
According to the comparative result of comparer, at least one driving switch device that is connected to capacitor is turn-offed thus,
Wherein this comparer comprises:
First operational amplifier is used for the mxm. of this voltage level with the voltage range that should be scheduled to compared; With
Second operational amplifier is used for the minimum of this voltage level with the voltage range that should be scheduled to compared.
12. plasma display panel device as claimed in claim 11, wherein this first or second operational amplifier is connected to feedback resistor.
13. plasma display panel device as claimed in claim 11, wherein this first or second operational amplifier is connected to the dropping resistor that is used to reduce input voltage.
14. plasma display panel device as claimed in claim 11, wherein should predetermined voltage range be capacitor builtin voltage 20% to 80%.
15. plasma display panel device as claimed in claim 11, wherein this capacitor apply keep voltage in a plurality of electrodes scan electrode or keep electrode.
16. plasma display panel device as claimed in claim 11, wherein this capacitor applies the addressing electrode of addressing voltage in a plurality of electrodes.
17. a driving method that comprises the plasma display panel device of a plurality of electrodes comprises step:
Be identified for storing the mxm. whether energy in the capacitor of the energy that offers electrode is higher than predetermined voltage range, and whether this energy is lower than the minimum of this predetermined voltage range; With
If this energy is higher than the mxm. of this predetermined voltage range, or be lower than the minimum of this predetermined voltage range, then stop to be used to drive the operation of a plurality of electrodes.
18. method as claimed in claim 17, wherein this capacitor apply keep voltage in a plurality of electrodes scan electrode or keep electrode.
19. method as claimed in claim 17, wherein this capacitor applies the addressing electrode of addressing voltage in a plurality of electrodes.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040096977 | 2004-11-24 | ||
| KR1020040096977A KR100609750B1 (en) | 2004-11-24 | 2004-11-24 | An Apparatus for Energy Recovering Circuit of Plasma Display Panel |
| KR1020050042758 | 2005-05-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1783166A CN1783166A (en) | 2006-06-07 |
| CN100555368C true CN100555368C (en) | 2009-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101251972A Expired - Fee Related CN100555368C (en) | 2004-11-24 | 2005-11-24 | Plasma display panel device and driving method thereof |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100609750B1 (en) |
| CN (1) | CN100555368C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100726572B1 (en) | 2005-11-22 | 2007-06-11 | 엘지이노텍 주식회사 | IPM filtering circuit for plasma display panel |
| KR100821053B1 (en) * | 2007-01-25 | 2008-04-08 | 삼성에스디아이 주식회사 | Plasma display panel device and driving method thereof |
| KR100857695B1 (en) * | 2007-02-23 | 2008-09-08 | 삼성에스디아이 주식회사 | reset circuit and plasma display panel device including thereof |
| KR101451745B1 (en) | 2011-10-13 | 2014-10-17 | 엘지디스플레이 주식회사 | Flat panal display device and draving circuit thereof |
| KR102393410B1 (en) | 2015-07-06 | 2022-05-03 | 삼성디스플레이 주식회사 | Current sensor and organic light emitting display device including the same |
-
2004
- 2004-11-24 KR KR1020040096977A patent/KR100609750B1/en not_active IP Right Cessation
-
2005
- 2005-11-24 CN CNB2005101251972A patent/CN100555368C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| KR100609750B1 (en) | 2006-08-08 |
| KR20060058227A (en) | 2006-05-30 |
| CN1783166A (en) | 2006-06-07 |
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