CN101271650A - Plasma display device - Google Patents

Abstract

The invention discloses a plasma display device, comprising a plasma display board comprising an addressing electrode, a driving unit which provides a data-signal to the addressing electrode in an addressing period of a subfield; the driving unit consists of a first switch unit and a second switch unit which are arranged in series between a data voltage source used for generating a data voltage and an earth connection, a node which is arranged between the first switch unit and the second switch unit, a third switch unit which is arranged between bias voltage source used for producing a bias voltage, a fourth switch unit which is arranged in parallel connection with the third switch unit and arranged between the node arranged between the first switch unit and the second switch unit and the bias voltage source, and a capacitance arranged between the fourth switch unit and the bias voltage source. After raising the voltage of the addressing electrode into the bias voltage, the plasma display device of the invention utilizes the voltage stored in the capacitance to raise the voltage of the addressing electrode so as to prevent a load and a heating from occurring intensively on a given switchover element, and has the advantage of damage prevention of the given switchover element.

Description

Plasma display system

Technical field

The present invention relates to a kind of plasma display system.

Background technology

Plasma display system can comprise the plasma display panel that forms electrode and, the drive division of drive signal is provided to the electrode of this plasma display panel.

Usually, form luminescent coating in the discharge string (Cell) of dividing by barrier on the plasma display panel.Drive division provides drive signal by electrode to discharge string.

Then, the drive signal by supply produces discharge in the discharge string.At this, when discharging by drive signal in discharge string, the discharge gas that charges in the discharge string can produce vacuum ultraviolet (VacuumUltravioletrays), and this excited by vacuum ultraviolet is formed on the fluorophor in the discharge string, produces visible light.By this visible light, show image on the picture of plasma display panel.

Summary of the invention

Goal of the invention: the present invention aims to provide and a kind ofly begins to rise from the voltage that is higher than earth level voltage by voltage data signal, reduces the plasma display system that switches the heat that (Switching) element produces when driving.

Technical scheme: plasma display system of the present invention comprises: the plasma display panel that comprises addressing electrode; With the drive division that data-signal is provided to addressing electrode in the address period of son field (Subfield); Drive division comprises: the 1st switch portion and the 2nd switch portion of arranged in series between data voltage source that produces data voltage and ground connection (GND), and be configured in node (Node) between the 1st switch portion and the 2nd switch portion, and produce between the bias voltage source of bias voltage the 3rd switch portion and, between node and bias voltage source between the 1st switch portion and the 2nd switch portion, the 4th switch portion of configuration in parallel with the 3rd switch portion, and be configured in electric capacity (Capacitor) portion between the 4th switch portion and the bias voltage source.

Wherein, the 1st switch portion and the 2nd switch portion between node be connected with addressing electrode.

Wherein, bias voltage is 0.2 times～0.8 times of data voltage.

Preferably, bias voltage is 0.3 times～0.5 times of data voltage.

Beneficial effect: plasma display system of the present invention, after addressing electrode voltage being brought up to till the bias voltage (Vb), utilization is stored in the voltage of the voltage raising addressing electrode of capacitance part (C), thereby prevent that load and heating from focusing on the specific switching device, have the effect that prevents specific switching device damage.

Description of drawings

The picture that Fig. 1 forms for the plasma display system of the present invention's one example.

Fig. 2 is the picture of plasma display panel structure one example.

Fig. 3 introduces the picture that embodies the image frame of image tone in the plasma display system of the present invention's one example.

Fig. 4 is for introducing the picture of operation one example of the plasma display system of the present invention's one example in the son field that is included in image frame.

The picture of the example that Fig. 5 forms for the drive division that data-signal is provided.

Fig. 6 a to Fig. 6 f is that the drive division of introducing Fig. 5 is operated the picture of an example.

Fig. 7 is a picture of introducing data voltage and bias voltage.

Fig. 8 a to Fig. 8 b is a picture of introducing an example of two data-signal consecutive hourss.

Embodiment

Below, specifically introduce plasma display system of the present invention with reference to accompanying drawing.

Fig. 1 is the picture that plasma display system of the present invention is formed.

Analysis chart 1, the plasma display system of the present invention's one example comprises plasma display panel 100 and drive division 110.

Plasma display panel 100 comprises side by side scan electrode (Y1～Yn) and keep electrode (Z1～Zn).Simultaneously, comprise with scan electrode and keep the addressing electrode (X1～Xm) of electrode crossing.

Drive division 110 during the keeping of son field (Subfield) in, to scan electrode (Y1～Yn) or keep electrode (Z1～Zn) provides and keeps signal.At this, 110 examples that form by a plate (Board) form of a display driver portion among Fig. 1, but drive division 110 can be divided into a plurality of plates according to the electrode that is formed on plasma display panel 100.

For example, drive division 110 be divided into the 1st electrode that drives plasma display panel 100 the 1st drive division (not shown) and, drive the 2nd electrode the 2nd drive division and, drive the 3rd drive division (not shown) of the 3rd electrode.

To further specifically introduce the drive division 110 of plasma display system of the present invention later on.

Below, Fig. 2 is a picture of introducing structure one example of the plasma display panel in the plasma display panel that can be included in an example of the present invention.

Analysis chart 2, the plasma display panel that then can be included in the plasma display system of the present invention's one example can be by having formed scan electrode (202 side by side, Y) and keep electrode (203, Z) front substrate 201, with formed and aforementioned scan electrode (202, Y) and keep electrode (203, Z) (213, X) back substrate (211) engages and forms address electrodes intersecting.At this, though Fig. 2 does not have reading scan electrode 202 and keep electrode 203 can comprise transparency electrode and bus electrode respectively.

Transparency electrode can comprise indium tin oxide transparent materials such as (IndiumTinOxide:ITO).

Bus electrode can comprise silver electrical conductance good metal materials such as (Ag).

Or, scan electrode 202 and keep electrode 203 and can form with individual layer (OneLayer) structure.For example, scan electrode 202 can be the electrode that omits aforementioned transparency electrode, for example ITO-Less electrode with keeping electrode 203.

And, though do not show among Fig. 2, in front substrate 201 and scan electrode 202 and keep electrode 203 between configuration have than scan electrode 202 and keep the black layer of electrode 203 darker colors.For example, scan electrode 202 and when keeping electrode 203 and comprising transparency electrode and bus electrode respectively, can be respectively between the transparency electrode of scan electrode 202 and the bus electrode and keep the transparency electrode of electrode 203 and bus electrode between dispose black layer.

The upper dielectric layer 204 that covers scan electrode 202 and keep electrode 203 can be formed at this formation scan electrode 202 and front substrate 201 tops of keeping electrode 203.

Upper dielectric layer 204 restriction scan electrodes 202 and keep the discharge current of electrode 203, make scan electrode (202, Y) and keep electrode (203, Z) between insulation.

Can on the front substrate 201 that forms upper dielectric layer 204, form the protective seam 205 of facilitation discharging condition.

This protective seam 205 can comprise the high material of secondary electron release coefficient, for example magnesium oxide (MgO) material.

Simultaneously, configured electrodes on the back substrate 211, for example addressing electrode (213, X), can be used on this formation addressing electrode (213, back substrate 211 tops X), form to cover addressing electrode (213, dielectric substrate X), for example lower dielectric layer 215.

This lower dielectric layer 215 can make addressing electrode (213, X) insulation.

The bar shaped that the dividing discharge space is a discharge string (StripeType), well shape (WellType), triangle (DeltaType), barriers such as honeycombed 112 can be formed at the top of this lower dielectric layer 215.Therefore, can between face substrate 201 and back substrate 211, form red (Red:R), green (Green:G), blue discharge string such as (Blue:B).

And, red (R), green (G) outside blue (B) discharge string, also can form white (White:W) or yellow (Yellow:Y) discharge string again.

Simultaneously, can be included in the redness (R) in the plasma display panel of plasma display system of the present invention's one example, the width of green (G) and blue (B) discharge string can be actual identical, can be with red (R), the width of the more than one discharge string in the middle of green (G) and blue (B) discharge string is made as different with other discharge string width.

For example, can be made as the width minimum of redness (R) discharge string, the width of green (G) and blue (B) discharge string is greater than the width of red (R) discharge string.

At this, the width of green (G) discharge string can be identical or different with the width reality of blue (B) discharge string.

So be provided with, then be located at interior luminescent coating 214 width of discharge string also along with the width of discharge string changes.For example, be located at blueness (B) the luminescent coating width of blueness (B) discharge string, wideer than redness (R) the luminescent coating width that is located in redness (R) discharge string; Be located at the width of green (G) luminescent coating in green (G) discharge string simultaneously, wideer than the width that is located at redness (R) luminescent coating in redness (R) discharge string.

Then, can improve the photo dazzle color temperature characteristic that is embodied.

And the plasma display panel that the plasma display system of the present invention's one example can adopt not only can adopt barrier shown in Figure 2 212 structures, also can take the barrier structure of multiple shape.For example, can adopt barrier 212 to comprise the 1st barrier 212b and the 2nd barrier 212a, the height of the 1st barrier 212b and the 2nd barrier 212a type barrier structure such as mutually different difference highly wherein, on the more than one barrier in the middle of the 1st barrier 212b or the 2nd barrier 212a, form the channel type barrier structure of (Channel) of the channel that can be used as the exhaust passage, on an above barrier in the middle of the 1st barrier 212b or the 2nd barrier 212a, form the flute profile barrier structure of groove (Hollow).

At this, if type barrier structures such as differences, then the height of the 1st barrier 212b can be lower than the 2nd barrier 212a height in the middle of the 1st barrier 212b or the 2nd barrier 212a.Simultaneously, if channel type barrier structure or grooved barrier structure then can form channel or groove on the 1st barrier 212b.

Simultaneously, though show and introduced in the plasma display panel of the present invention's one example red (R), green (G) and blue (B) discharge string are arranged in respectively on the same line, also can be with other shapes arrangements.For example, also can take redness (R), green (G) and blue (B) discharge string are arranged by triangle (Delta) type of triangular shaped arrangement.And the shape of discharge string also can adopt the pentagon outside the quadrangle, multiple polygon such as sexangle.

And, only show among Fig. 2 that barrier 212 is located at the example of back substrate 211, but barrier 212 can be located on any substrate in the middle of front substrate 201 or the back substrate 211.

At this, can charge into certain discharge gas in the discharge string by barrier 212 divisions.

Simultaneously, in the discharge string by barrier 212 divisions, discharge the luminescent coating 214 of the visible light of displayed image in the time that address discharge can being formed.For example, can form redness (Red:R), green (Green:G), blue (Blue:B) luminescent coating.And except red (R), green (G) also can form white (White:W) and/or yellow (Yellow:Y) luminescent coating again outside blue (B) fluorophor.

And, red (R), luminescent coating 214 thickness of at least one discharge string are different with other discharge string in the middle of green (G) and blue (B) discharge string.For example, promptly green (G) luminescent coating of the luminescent coating of green (G) discharge string, or the luminescent coating of blue discharge string, the thickness that is blue phosphor layers is thicker than promptly red (R) thickness of phosphor layer of the luminescent coating of red (R) discharge string, at this, the thickness of phosphor layer of green (G) discharge string can be identical or different with the thickness of phosphor layer reality of blue (B) discharge string.

Simultaneously, more than only be plasma display panel one example that shows and introduced the present invention's one example, indicate the plasma display panel that the present invention is not limited to have above structure at this.For example, only show the upper dielectric layer of numbering 204 in more than introducing and number the example that 215 lower dielectric layer is respectively a layer (Layer), but more than one dielectric layer can be formed by a plurality of layers in the middle of this upper dielectric layer and the lower dielectric layer.

And, in order to prevent to number the outside reflection of light that 212 barrier causes, can form other black layer (not shown) that can absorb exterior light again on barrier 212 tops.

And, can form other black layer (not shown) again at the ad-hoc location on the front substrate 201 corresponding with barrier 212.

And the width or the thickness that are formed on the 3rd electrode 213 on the back substrate 211 can be certain value, and the width of discharge string inside or thickness also can be different with discharge string external width or thickness.For example, the width of discharge string inside or thickness can be wideer or thicker than discharge string outside.

Below, Fig. 3 introduces the picture that embodies the image frame (Frame) of image tone in the plasma display system of the present invention's one example.

Analysis chart 3, the image frame that embodies image tone (GrayLevel) in the plasma display system of an example then of the present invention is divided into the mutually different a plurality of son fields of number of light emission times.

And, though do not show among the figure, the son field of at least more than one in a plurality of son fields can be further divided into (ResetPeriod) during the replacement of all discharge string of initialization, the address period of the discharge string that selection will be discharged (AddressPeriod) and embody (SustainPeriod) during the keeping of tone according to discharge time.

For example, with 256 tone display images the time, as shown in Figure 3, an image frame is divided into 8 son fields (SF1 to SF8), and 8 son fields (SF1 to SF8) are divided into respectively during the replacement again, address period and keep during.

And, can offer by adjustment and keep the signal number during keeping, set the tone weighted value of corresponding son field.That is, can utilize and be that each son field sets certain tone weighted value during keeping.For example, can adopt tone weighted value to be made as 2 with the 1st son field ⁰, the tone weighted value of the 2nd son field is made as 2 ¹Method, determine the tone weighted value of each son field, thereby the tone weighted value that makes each son field is with 2 ⁿThe ratio of (still, n=0,1,2,3,4,5,6,7) increases.So, can in each son field, be adjusted in the number of keeping signal of supplying during the keeping of each son field, thereby embody various image tone according to the tone weighted value.

The plasma display system of the present invention's one example such as for 1 second image of demonstration, adopts a plurality of frames for show image.For example, for showing 1 second image, adopt 60 image frames.At this moment, the length of an image frame (T) can be 1/60 second, i.e. 16.67ms.

Wherein, Fig. 3 only shows and introduced the example that a frame is divided into 8 son fields, but can be different with it, can various change forms the number of the son field of an image frame.For example, can form an image frame, also can form an image frame by 10 sub-fields by 12 sub-fields till the 1st son field to the 12 son fields.

And, each son field is the series arrangement that increases according to tone weighted value size in an image frame shown in Figure 3, but also can be different with it, according to the series arrangement that the tone weighted value reduces, each son field also can irrespectively be arranged with the tone weighted value.

Below, Fig. 4 is for introducing the picture of operation one example of the plasma display panel of an example of the present invention in the son field that is included in image frame.The drive signal that indicates following introduction in advance is that the drive division by the numbering 110 of above-mentioned Fig. 1 provides.

Analysis chart 4, in during the establishment during carrying out initialized replacement (Set-Up), to scan electrode apply sharply rise to the 2nd voltage V2 from the 1st voltage V1 after, voltage drops to tiltedly (Ramp-Up) signal of going up of the 3rd voltage V3 more gradually since the 2nd voltage V2.Wherein, the 1st voltage V1 can be the voltage of ground connection (GND).

In between this startup stage, by last oblique signal weak dark discharge (DarkDischarge) taking place in the discharge string, promptly creates discharge.Create discharge by this, will accumulate the wall electric charge (WallCharge) of a certain degree in the discharge string.

During the memory after between startup stage (Set-Down), can after last oblique signal, provide and this declivity (Ramp-Down) signal of oblique signal opposite polarity direction to scan electrode.

Wherein, the declivity signal can be from peak value (Peak) voltage of last oblique signal, and the 4th voltage V4 that promptly is lower than the 3rd voltage V3 drops to the 5th voltage V5 gradually.

Along with the supply of this declivity signal, faint elimination discharge (EraseDischarge) takes place, i.e. memory discharge in discharge string.By this memory discharge, will evenly residually in discharge string can stablize the wall electric charge that address discharge takes place.

In the address period after during resetting, can provide actual sustain to scan electrode is more high voltage, for example the scanning offset signal of the 6th voltage V6 of the 5th voltage V5 than the minimum voltage of declivity signal.

Simultaneously, can provide from the sweep signal (Scan) of scanning offset signal decline scanning voltage Δ Vy to scan electrode.

Simultaneously, the width of sweep signal (Scan) can change according to son field unit.That is, at least more than one the son field, the width of sweep signal (Scan) can be different with the sweep signal width in other son fields.For example, being arranged in sweep signal (Scan) width of the son field of back position in time can be littler than sweep signal (Scan) width of in front son field.And, the sweep signal that son field puts in order (Scan) width reduces can adopt 2.6 μ s (microsecond), 2.3 μ s (microsecond), 2.1 μ s (microsecond), 1.9 μ s progressive modes such as (microseconds), or adopt 2.6 μ s (microsecond), 2.3 μ s (microsecond), 2.3 μ s (microsecond), 2.1 μ s (microsecond) ... 1.9 μ s (microsecond), 1.9 μ s modes such as (microseconds).

So, when scan electrode provides sweep signal, can be corresponding with sweep signal, the data-signal of the size (Δ Vd) of climb data voltage is provided to addressing electrode.To specifically introduce data-signal later on and the composition of the drive division of this data-signal will be provided.

Along with the supply of these sweep signals and data-signal signal, the difference of the voltage of sweep signal and data-signal will with, the wall voltage addition that the wall electric charge that generates in during the replacement causes produces address discharge thus in the discharge string of supplies data signals.

At this, in address period,, can provide and keep offset signal to keeping electrode for the interference that prevents to keep electrode causes the instability of address discharge.

At this, keep the offset signal practical stability and keep less than during keeping, applying and keep voltage of signals, keep bias voltage Vz greater than the voltage of earth level (GND).

Afterwards, in during the keeping of show image to scan electrode or keep in the middle of the electrode one and provide with top electrode and keep signal.For example, can or keep electrode to scan electrode alternately applies and keeps signal.

If such signal of keeping is provided, then provide when keeping signal, at scan electrode or keep to produce between the electrode and keep discharge and promptly show discharge by the selected discharge string of address discharge wall voltage and voltage (Vs) addition of keeping of keeping signal in along with discharge string.The image that then, can on picture, show certain tone.

Below, the picture of the example that Fig. 5 forms for the drive division that data-signal is provided.

Analysis chart 5, drive division comprise the 1st switch portion S1, the 2nd switch portion S2, and the 3rd switch portion S3, the 4th switch portion S4 and capacitance part (Capacitor, C).

The 1st switch portion S1 and the 2nd switch portion S2 are arranged in series between the data voltage source and ground connection (GND) that produces data voltage Vd.More particularly, the end of the 1st switch portion S1 is connected with the data voltage source, and the other end is connected with an end of the 2nd switch portion at the 1st node n1.And the other end of the 2nd switch portion S2 is connected with ground connection (GND).

The 3rd switch portion S3 is configured in node between the 1st switch portion S1 and the 2nd switch portion S2, promptly between the bias voltage source of the 1st node n1 and generation bias voltage Vb.

The 4th switch portion S4 is configured in node between the 1st switch portion S1 and the 2nd switch portion S2, promptly between the 1st node n1 and bias voltage source, with the 3rd switch portion S3 configuration in parallel.And capacitance part C is configured between the 4th switch portion S4 and the bias voltage source.

More particularly, the 3rd switch portion S3 one end is connected with capacitance part C one end with bias voltage source simultaneously at the 2nd node n2; The capacitance part C other end is connected with the other end of the 4th switch portion S4 at the 1st node n1.

At this, node between the 1st switch portion S1 and the 2nd switch portion S2, promptly the 1st node n1 is connected with the addressing electrode of plasma display panel.

Below, Fig. 6 a to Fig. 6 f is that the drive division of introducing Fig. 5 is operated the picture of an example.

At first, analysis chart 6a, then during the d1 the 3rd switch portion S3 for opening (On) state, the 1st switch portion S1, the 2nd switch portion S2 and the 4th switch portion S4 are for closing (Off) state.

Then, shown in Fig. 6 b, form bias voltage source to the 2 node n2, the 3rd switch portion S3, the voltage feed lines till the 1st node n1 and the addressing electrode X, bias voltage Vb is provided to addressing electrode X thus, and the voltage of addressing electrode X rises to bias voltage Vb.

During this d1, the voltage of addressing electrode X is when the voltage of earth level rises to bias voltage Vb, if between scan electrode and addressing electrode X address discharge takes place, then because of the bias voltage Vb data voltage Vd that compares is little, so a little less than address discharge intensity may become.

Therefore, during d1, when the voltage of addressing electrode X rises to bias voltage Vb from earth level voltage, between scan electrode and addressing electrode X address discharge does not take place preferably, be preferably in during the d2 described later or during the d3 in the middle of at least one during, between scan electrode and addressing electrode X, produce address discharge.

The 4th switch portion S4 is opened during the d2.

Then, shown in Fig. 6 c, form from capacitance part C to the 4 switch portion S4, the voltage feed lines till the 1st node n1 and the addressing electrode X.At this, suppose there is certain voltage among the capacitance part C, the voltage that then is stored in capacitance part C provides addressing electrode X, and thus, addressing electrode X voltage rises to the 10th voltage V10 gradually.

During d3, the 3rd switch portion S3 and the 4th switch portion S4 are closed, and the 1st switch portion S1 is opened.

Then, shown in Fig. 6 d, form from data voltage source to the 1 switch portion S1, the 1st node n1, the voltage feed lines of addressing electrode X provides data voltage Vd to addressing electrode X, and the voltage of addressing electrode X rises to data voltage Vd from the 10th voltage V10 thus.In other words, the voltage of addressing electrode X is clamped down on (Clamping) to data voltage Vd from the 10th voltage V10.Simultaneously, till the 1st switch portion S1 is closed, addressing electrode X voltage actual sustain data voltage Vd.

Analyze the above d1 that introduces, d2, during the d3, then the voltage of addressing electrode X when earth level voltage rises to data voltage Vd, the 3rd switch portion S3, the 4th switch portion S4, the 1st switch portion S1 is opened successively.

And the voltage of supposing addressing electrode X is only opened the example of the 1st switch portion S1 when the voltage of earth level rises to data voltage Vd.

At this moment, along with the 1st switch portion S1 is opened, the data voltage Vd that the data voltage source is produced directly is fed to addressing electrode X, and the voltage of addressing electrode X is that the voltage from earth level sharply rises to data voltage Vd.

Then, can the most of load of carrying, the therefore too much heat of meeting generation among the 1st switch portion S1 among the 1st switch portion S1.

Even the electrical damage that the 1st switch portion S1 is burnt can take place.

On the contrary, shown in an example of the present invention, when the voltage of addressing electrode X rises to till the data voltage Vd from the voltage of earth level, if open the 3rd switch portion S3 successively, the 4th switch portion S4, the 1st switch portion S1, then load (Load) will be distributed to the 3rd switch portion S3, the 4th switch portion S4 and the 1st switch portion S1.

Therefore, by preventing the excessive load of specific switching (Switching) element carrying, can prevent that heating from focusing on specific switching device, prevents the electrical damage of switching device.

The 1st switch portion S1 is closed during the d4, and the 4th switch portion S4 is opened.

Then, shown in Fig. 6 e, form from addressing electrode X to the 1 node n1, the 4th switch portion S4, the voltage feed lines of capacitance part C.

At this moment, during d2, the voltage that is stored in capacitance part C is provided to addressing electrode X, provides data voltage Vd to addressing electrode X during the d3, and the voltage that therefore is in addressing electrode X is higher than the state of capacitance part C voltage.

Therefore, the voltage of addressing electrode X reclaims and stores capacitance part C into, and the voltage of addressing electrode X can drop to the 20th voltage V20 gradually from data voltage Vd.

The 20th voltage V20 can be identical with bias voltage Vb, also can be different.At this, the 20th voltage V20 is fully low to be that the voltage of representing addressing electrode X fully is recovered to capacitance part C.Therefore, if consider the voltage recovery of addressing electrode X, more favourable when then the 20th voltage V20 is lower than bias voltage Vb.

During the d5, the 4th switch portion S4 is closed, and the 2nd switch portion S2 is opened.Then, shown in Fig. 6 f, form from addressing electrode X to the 1 node n1, the 2nd switch portion S2, the voltage of ground connection GND provides the path, and the voltage of addressing electrode X is provided to the voltage of earth level.

Can adopt the method shown in Fig. 6 a to Fig. 6 f, X provides data-signal to addressing electrode.

Below, Fig. 7 is a picture of introducing data voltage and bias voltage.At this, the X among Fig. 7 represents that heating focuses on the specific switching device, or address discharge intensity is too small, represents bad.Zero expression is good, and ◎ represents fine.

Analysis chart 7, then bias voltage Vb is more than 0.1 times below 0.15 times time of data voltage Vd, too small because of bias voltage Vb size, the heat that is distributed to the 3rd switch portion S3 is too small.Therefore, the voltage of addressing electrode X is when the voltage of earth level rises to data voltage Vd, and the heat major part of generation concentrates on the 1st switch portion S1 and the 4th switch portion S4.Therefore, heating dispersion aspect is bad.

On the contrary, bias voltage Vb is more than 0.2 times below 0.25 times time of data voltage Vd, bias voltage Vb size just, the voltage of addressing electrode X is when the voltage of earth level rises to data voltage Vd, the heat that produces to a certain degree is distributed to the 1st switch portion S1, the 3rd switch portion S3 and the 4th switch portion S4.Therefore, heating dispersion aspect is good.

Simultaneously, bias voltage Vb is more than 0.3 times below 0.9 times time of data voltage Vd, and bias voltage Vb size is best, and the voltage of addressing electrode X is when the voltage of earth level rises to data voltage Vd, the heat that produces evenly spreads to the 1st switch portion S1, the 3rd switch portion S3 and the 4th switch portion S4.Therefore, heating dispersion aspect is fine.

Simultaneously, bias voltage Vb be data voltage Vd more than 0.9 times the time, bias voltage Vb size is excessive, takes place before the address discharge at least one in during the d2 of above-mentioned Fig. 6 a or d3, just address discharge may take place earlier in during the d1, a little less than address discharge intensity can become thus.Therefore, strength of discharge is bad.

On the contrary, bias voltage Vb is more than 0.6 times below 0.8 times time of data voltage Vd, bias voltage Vb just, address discharge takes place in can preventing during the d1.Therefore, strength of discharge is good.

Simultaneously, bias voltage Vb is more than 0.1 times below 0.5 times time of data voltage Vd, and the size of bias voltage Vb is fully little, and the voltage ascensional range is fully big during the d2 of Fig. 6 a or in during the d3.Therefore, strength of discharge is fine.

When considering the content of above Fig. 7, bias voltage Vb preferably is approximately more than 0.2 times below 0.8 times of data voltage Vd, is more preferably more than 0.3 times below 0.5 times.

Below, Fig. 8 a to Fig. 8 b is a picture of introducing an example of two data-signal consecutive hourss.At this, the content that has been specifically introduced more than omitting among Fig. 8 a to Fig. 8 b.

At first, analysis chart 8a, then the 1st data-signal (data1) and the 2nd data-signal (data2) consecutive hours, the d10 of the 1st data-signal, d20, during the d30 in the d1 of above-mentioned Fig. 6 a, d2, actual identical during the d3.

The 1st switch portion S1 is closed in during the d40, and the 4th switch portion S4 is opened.

Then, form from addressing electrode X to the 1 node n1, the 4th switch portion S4, the voltage feed lines of capacitance part C, the voltage of addressing electrode X is recovered and stores capacitance part C into, and the voltage of addressing electrode X can descend gradually from data voltage Vd.

Below, during d50, the 3rd switch portion S3 is opened, and the 4th switch portion S4 is closed.

Then, form from bias voltage source to the 2 node n2, the 3rd switch portion S3, the voltage feed lines of the 1st node n1 and addressing electrode X, bias voltage Vb is provided to addressing electrode X thus, and the voltage of addressing electrode X becomes bias voltage Vb.

Below, during d60, the 4th switch portion S4 is opened.

Then, form from capacitance part C to the 4 switch portion S4, the voltage feed lines of the 1st node n1 and addressing electrode X, the voltage that is stored in capacitance part C is provided to addressing electrode X, and the voltage of addressing electrode X rises to the 30th voltage V30 gradually thus.

The 30th voltage V30 can be identical with the 20th voltage V20 reality of above-mentioned Fig. 6 a, also can be different.

Below, during the d70 in, the 3rd switch portion S3 and the 4th switch portion S4 are closed, the 1st switch portion S1 is opened.

Then, form from data voltage source to the 1 switch portion S1, the 1st node n1, the voltage feed lines of addressing electrode X provides data voltage Vd to addressing electrode X, and the voltage of addressing electrode X rises to data voltage Vd from the 30th voltage V30 thus.In other words, the voltage of addressing electrode X is clamped down on data voltage Vd from the 30th voltage V30.Simultaneously, till the 1st switch portion S1 is closed, the voltage actual sustain data voltage Vd of addressing electrode X.

During d80, the 1st switch portion S1 is closed, and the 4th switch portion S4 is opened.

Then, form from addressing electrode X to the 1 node n1, the 4th switch portion S4, the voltage feed lines of capacitance part C, the voltage of addressing electrode X is recovered and stores capacitance part C into, and the voltage of addressing electrode X drops to the 40th voltage V40 gradually from data voltage Vd thus.

The 40th voltage V40 can be identical with the 20th voltage V20 reality of above-mentioned Fig. 6 a, also can be different.

Below, analysis chart 8b among then above-mentioned Fig. 8 a, is included between the 1st data-signal (data1) and the 2nd data-signal (data2), the voltage of addressing electrode X is recovered to capacitance part C, and the operation of the voltage of recovery is provided to addressing electrode X; But among Fig. 8 b, omitted between the 1st data-signal (data1) and the 2nd data-signal (data2), the voltage of addressing electrode X is recovered to capacitance part C, and provide the operation of the voltage of recovery to addressing electrode X, the voltage that continues addressing electrode X in the 1st data-signal (data1) keep data voltage Vd during and, in the 2nd data-signal (data2) voltage of addressing electrode X keep data voltage Vd during.

So, two data-signal consecutive hourss can adopt several different methods.

As mentioned above, the technology composition that is appreciated that the invention described above is that the insider of the technical field of the invention does not change technological thought of the present invention or necessary characteristics, just can implement with other concrete forms.

Therefore, should understand the above example of recording and narrating and be illustration in every respect, be not to be restriction.Than above-mentioned detailed introduction, what more can show scope of the present invention is the scope of claim, should be interpreted as the meaning of accessory rights claimed range and all changes or the change form of scope and its idea derivation of equal value and all be included in scope of the present invention.

Claims (4)

1, a kind of plasma display system is characterized in that it comprises: the plasma display panel that comprises addressing electrode; With the drive division that data-signal is provided to addressing electrode in the address period of son field; Above-mentioned drive division comprises: the 1st switch portion and the 2nd switch portion of arranged in series between data voltage source that produces data voltage and ground connection, and be configured in node between above-mentioned the 1st switch portion and the 2nd switch portion, and the 3rd switch portion between the bias voltage source of generation bias voltage, and between node and above-mentioned bias voltage source between above-mentioned the 1st switch portion and the 2nd switch portion, the 4th switch portion of configuration in parallel with above-mentioned the 3rd switch portion, and be configured in capacitance part between above-mentioned the 4th switch portion and the bias voltage source.

2, plasma display system according to claim 1 is characterized in that node is connected with above-mentioned addressing electrode between above-mentioned the 1st switch portion and the 2nd switch portion.

3, plasma display system according to claim 1 is characterized in that above-mentioned bias voltage is 0.2 times～0.8 times of above-mentioned data voltage.

4, plasma display system according to claim 3 is characterized in that above-mentioned bias voltage is 0.3 times～0.5 times of above-mentioned data voltage.

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