CN101447164A - Plasma display apparatus - Google Patents
Plasma display apparatus Download PDFInfo
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- CN101447164A CN101447164A CNA200810129691XA CN200810129691A CN101447164A CN 101447164 A CN101447164 A CN 101447164A CN A200810129691X A CNA200810129691X A CN A200810129691XA CN 200810129691 A CN200810129691 A CN 200810129691A CN 101447164 A CN101447164 A CN 101447164A
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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
- G09G3/2927—Details of initialising
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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
- G09G2310/00—Command of the display device
- G09G2310/06—Details of flat display driving waveforms
- G09G2310/066—Waveforms comprising a gently increasing or decreasing portion, e.g. ramp
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/041—Temperature compensation
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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
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/028—Generation of voltages supplied to electrode drivers in a matrix display other than LCD
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- Physics & Mathematics (AREA)
- 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)
- Gas-Filled Discharge Tubes (AREA)
Abstract
The present invention discloses a plasma display apparatus, including a plasma display board equipped with a scanning electrode, a drive part for providing a descend signal for the scanning electrode to gradually drop a voltage during a resetting period of at least one subsegment of multiple subsegments of a frame; when the temperature of the plasma display board is a second temperature, the voltage variation rate of the descend signal is a second variation rate; when the temperature of the plasma display board is a first temperature less than the second temperature, the voltage variation rate of the descend signal may be a first variation rate less than the second variation rate. The invention may prevent temperature error discharge and can improve image quality.
Description
Technical field
The present invention relates to a kind of plasma display system, specifically a kind ofly prevent temperature and misplace electricity, improve the plasma display system of image quality.
Background technology
Plasma display system comprises plasma display panel.
In the plasma display panel, form luminescent coating in the discharge string (Cell) by the barrier division, form a plurality of electrodes (Electrode) simultaneously.
Electrode to plasma display panel provides drive signal, then produces discharge by the drive signal that provides in the discharge string.Wherein, when producing discharge by drive signal in the discharge string, the discharge gas that charges in the discharge string discharges vacuum ultraviolet (VacuumUltravioletrays), by this vacuum ultraviolet, and show image on the picture of plasma display panel.
Summary of the invention
The object of the present invention is to provide a kind of preventing because the plasma display system that misplaces electricity that temperature causes.
One example of plasma display system of the present invention comprises the plasma display panel that disposes scan electrode, in during the replacement of at least one son field in the middle of a plurality of son fields (Sub-Field) of frame (Frame), provide the drive division of the declivity signal that voltage descends gradually to scan electrode; When the plasma display panel temperature was the 2nd temperature, the size of declivity voltage of signals rate of change was the 2nd rate of change; The plasma display panel temperature is the 1st temperature that is lower than the 2nd temperature
The time, declivity voltage of signals rate of change size can be the 1st rate of change less than the 2nd rate of change.
And the 1st rate of change is more than 0.18 times below 0.97 times of the 2nd rate of change, and best the 1st rate of change is more than 0.32 times below 0.75 times of the 2nd rate of change.
And, during the pre-replacement of drive division before during resetting in, provide the 1st signal with declivity signal identical polar to scan electrode, corresponding with the 1st signal, provide the 2nd signal with the 1st signal opposite polarity to keeping electrode.
And the another example of plasma display system of the present invention comprises: the plasma display panel of configuration scan electrode; In the middle of a plurality of son fields (Sub-Field) of frame (Frame) during the replacement of at least one son field in, the drive division of the declivity signal that voltage descends gradually is provided to scan electrode, drive division provides the dropping signal corresponding with the declivity signal to keeping electrode in during resetting, when the temperature of plasma display panel is the 2nd temperature, the size of declivity voltage of signals rate of change is the 2nd rate of change, the temperature of plasma display panel is when being lower than the 1st temperature of the 2nd temperature, and declivity voltage of signals rate of change size can be the 1st rate of change less than the 2nd rate of change.
And drive division can provide the 1st to keep offset signal (Vzb1) to keeping electrode before dropping signal, after dropping signal, provided the 2nd to keep offset signal (Vzb2) to keeping electrode.
And, the 1st keeps offset signal and the 2nd, and to keep the voltage of offset signal identical mutually, the 1st keeps the voltage that offset signal and the 2nd is kept offset signal, can be higher than the voltage of earth level (GND), or provide during the keeping after being less than or equal to during the replacement and keep voltage of signals (Vs).
Plasma display system of the present invention has the effect of improving image quality by preventing the electricity that misplaces of temperature.
Description of drawings
Fig. 1 is a picture of introducing the plasma display system composition of the present invention's one example.
Fig. 2 is a picture of introducing the plasma display panel structure.
Fig. 3 introduces in the plasma display system of an example of the present invention, embodies the picture of the frame (Frame) of image tone.
Fig. 4 is that the plasma display system of introducing the present invention's one example is operated the picture of an example.
Fig. 5 is for introducing the temperature according to plasma display panel, the picture of method one example of the degree of tilt of adjusting declivity signal.
Fig. 6 for introduce can be during remembering to the picture of keeping the drive signal that electrode provides.
Fig. 7 is the picture of another example of introducing the plasma display system operation of the present invention's one example.
Fig. 8 is for introducing the picture during resetting in advance.
Fig. 9 is a picture of introducing another form one example of reset signal.
Embodiment
Below, specifically introduce the present invention with reference to drawings and Examples.
Fig. 1 is a picture of introducing the plasma display system composition of the present invention's one example.
Wherein, among Fig. 1, shown the example of drive division 110 by a plate (Board) form, drive division 110 can be divided into a plurality of plate forms according to the electrode that is formed on plasma display panel 100 among the present invention.For example, drive division 110 can be divided into the scan electrode that drives plasma display panel 100 the 1st drive division (among the figure not show) and, drive the 2nd drive division of keeping electrode and, drive the 3rd drive division (not demonstration among the figure) of addressing electrode.
Fig. 2 is a picture of introducing the plasma display panel structure.
Can be on front substrate 201 tops that form scan electrode (Y) 202 and keep electrode (Z) 203, form the discharge current that limits scan electrode (Y) 202 and keep electrode (Z) 203, make scan electrode (Y) 202 simultaneously and keep the upper dielectric layer 204 that insulate between the electrode (Z) 203.
Can on the front substrate 201 of 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.
And, configured electrodes on the back substrate 211, for example addressing electrode (X) 213 can form on the back substrate 211 of this configuration addressing electrode (X) 213 and cover addressing electrode (X) 213, and makes the lower dielectric layer 215 of addressing electrode (X) 213 insulation.
Simultaneously, 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 lower dielectric layer 115.Thus, form red (Red:R) green (Green:G), blue (Blue:B) discharge string in front between substrate 101 and the back substrate 111.
And, except red (R), green (G), blue (B) discharge string, can also be equipped with white (White:W) or yellow (Yellow:Y) discharge string again.
Simultaneously, red (R), the width of green (G) and blue (B) discharge string can be actual identical, also can be with red (R), and 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.Then can improve the color temperature characteristic of the image that is manifested.The width of green (G) discharge string can be identical or different with the width reality of blue (B) discharge string.
And, not only can adopt barrier shown in Figure 2 212 structures, also can adopt the barrier structure of multiple shape.For example, barrier 212 comprises the 1st barrier 212b and the 2nd barrier 212a.Can adopt at this, the 1st barrier 212b height and the highly mutually different difference type barrier structure of the 2nd barrier 212a, at least any above barrier forms the channel type barrier structure of the channel (Channel) that can be used as the exhaust passage in the middle of the 1st barrier 212a or the 2nd barrier 212b, the flute profile barrier structure of any above barrier formation groove (Hollow) at least in the middle of the 1st barrier 212b or the 2nd barrier 212a.
Wherein, if adopt the difference type barrier then the height of the 1st barrier 212b can be lower than the height of the 2nd barrier 212a.Simultaneously, if adopt channel type barrier structure, then can on the 1st barrier 212b, form channel or groove.
And, illustrating and introduced red (R), green (G) and blue (B) discharge string be the example on same line respectively, but also can adopt other modes to arrange.Such as red (R), green (G) and blue (B) discharge string are with the arrangement of delta (Delta) type of rounded projections arranged.The shape of discharge string not only can be taked quadrangle too, also can take pentagon, multiple polygon such as sexangle.
And, only having shown that in this Fig. 2 barrier 212 is formed on the example on the back substrate 211, barrier 212 is formed on in the middle of front substrate 201 or the back substrate 211 at least one.
At this, preferably charge into the discharge gas of appointment in the discharge string by barrier 212 divisions.
Simultaneously, discharge the luminescent coating 214 of the visible light of display image in the time of can in the discharge string of dividing, forming address discharge by barrier 212.For example, can form redness (Red:R), green (Green:G), blue (Blue:B) luminescent coating.
And except red (R), green (G) outside blue (B) luminescent coating, also can form white (White:W) and/or yellow (Yellow:Y) luminescent coating again.
And the thickness of the luminescent coating (214) of at least one discharge string can be different with other luminescent coatings in the middle of red (R), green (G), blue (B) discharge string.For example, the luminescent coating of green (G) discharge string, the luminescent coating in promptly green (G) luminescent coating or blueness (B) discharge string, promptly blue (B) thickness of phosphor layer is than the luminescent coating of red (R) discharge string, and promptly the thickness of red (R) luminescent coating is thicker.At this, the thickness of green (G) luminescent coating can be identical or different with blue (B) thickness of phosphor layer and reality.
Only shown in more than introducing to number 204 upper dielectric layer and number 215 lower dielectric layer to be respectively the example of a layer (Layer), but can at least one form in the middle of this dielectric layer and the lower dielectric layer by a plurality of layers.
Simultaneously, in order to prevent to number the external light reflection that 212 barrier causes, can the top of barrier 212 set up can absorb outside the black layer (not shown) of light.
And, also can set up the black layer (not shown) at the ad-hoc location on the front substrate 201 corresponding with barrier 212.
And the wide or thickness that is formed on the addressing electrode 213 on the back substrate 211 can be certain value, but the wide or thickness in the discharge string can be different with the wide or thickness of discharge string outside.For example, the wide or thickness of discharge string inside is greater than the wide or thickness of discharge string outside.
Fig. 3 introduces in the plasma display system of an example of the present invention, embodies the picture of the frame (Frame) of image tone.
At first analysis chart 3, and then in the plasma display system of the present invention's one example, the image frame that embodies the tone (GrayLevel) of image is divided into the different son field of number of light emission times.
Simultaneously, though do not show among the figure, more than one son field can be further divided into (ResetPeriod) during the replacement of all discharge string of initialization in the middle of a plurality of son fields, 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, as shown in Figure 3, an image frame is divided into 8 son fields (SF1 to SF8) with 256 tone display images the time, and 8 son fields (SF1 to SF8) are divided into respectively during the replacement again, address period and keep during.
Simultaneously, can offer by adjusting 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 an example of the present invention is in order to show 1 second image, such as for showing 1 second image, adopts a plurality of image frames.For example, for showing 1 second image, adopt 60 frames.At this moment, the length of a frame can be 1/60 second, i.e. 16.67ms.
Wherein, Fig. 3 only shows and introduced the example that an image frame is divided into 8 son fields, but can be different with it, can various change forms the number of the son field of a frame.For example, can form a frame, also can form a 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 a frame shown in Figure 3, but also can be different with it, and according to the series arrangement that the tone weighted value reduces, each son field also can irrespectively be arranged with the tone weighted value.
Fig. 4 is that the plasma display system of introducing the present invention's one example is operated the picture of an example.Below the drive signal that will introduce is provided by the drive division of the numbering 110 of above-mentioned Fig. 1.
Analysis chart 4, then carry out during the initialized replacement in, can provide reset signal to scan electrode (Y).Reset signal can comprise tiltedly (Ramp-Up) signal and declivity (Ramp-Down) signal.
Specifically, provide to scan electrode during the establishment (Set-Up), rise to the 2nd voltage (V2) afterwards, rise to the last oblique signal of the 3rd voltage (V3) again since the 2nd voltage (V2) gradually since the 1st voltage (V1).
In between 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 (Y).
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 the minimum voltage of actual sustain than declivity signal (V5) higher voltage to the scanning hotel owner, for example the scanning offset signal Vsc of the 6th voltage (V6).
Simultaneously, can provide the sweep signal that begins to descend from the scanning offset signal to scan electrode.
Simultaneously, the pulse width to the sweep signal (Scan) that scan electrode provides can be different with the sweep signal pulse width in other son fields in the address period of at least one son field.For example, being arranged in the sweep signal width of the son field of back position in time can be littler than the sweep signal width of in front son field.And the sweep signal width that son field puts in order reduces can adopt 2.6 μ s (microsecond), 2.3 μ s, and 2.1 μ s, progressive modes such as 1.9 μ s, or adopt 2.6 μ s (microsecond), 2.3 μ s, 2.3 μ s, 2.1 μ s......1.9 μ s, modes such as 1.9 μ s.
So, when scan electrode provides sweep signal, can be corresponding with sweep signal, (X) provides data-signal to addressing electrode.
Sweep signal and data-signal are provided, then the difference of the data voltage 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, generation address discharge the discharge string of supplies data signals voltage (Vd) in thus.
At this, in address period, for the interference that prevents to keep electrode (Z) causes the instability of address discharge, can (Z provides and keeps offset signal (Vzb) to keeping electrode.
At this, keep offset signal and can stable maintenance keep voltage of signals less than during keeping, applying, keep bias voltage (Vz) greater than the voltage of earth level (GND).
Afterwards, interscan electrode or keep in the middle of the electrode one and provide with top electrode and keep signal during the keeping of show image.For example, can and keep electrode to scan electrode alternately applies and keeps signal.
If such signal of keeping is provided, then provide when keeping signal by the selected discharge string of address discharge wall voltage and voltage (Vs) addition of keeping of keeping signal in along with discharge string, between the 1st electrode and the 2nd electrode, produce and keep discharge and promptly show discharge.
Simultaneously, at least one son field, provide a plurality of signals of keeping during keeping, a plurality of to keep in the middle of the signal at least one pulse width of keeping signal different with other pulse widths of keeping signal.For example, a plurality of keeping in the middle of the signal, the pulse width of keeping signal that provides is the earliest kept the pulse width of signal greater than other.Then, further stable maintenance discharge.
Fig. 5 is for introducing the temperature according to plasma display panel, the picture of method one example of the degree of tilt of adjusting declivity signal.
Analysis chart 5, when the plasma display panel temperature was the 2nd temperature, shown in (b), per hour providing voltage change ratio (V/ μ m) size to scan electrode in during resetting was the 2nd declivity signal of the 2nd rate of change.
And the plasma display panel temperature is when being lower than the 1st temperature of the 2nd temperature, shown in (a), provides (the V/ μ m) size that per hour has voltage change ratio for being lower than the 1st declivity signal of the 1st rate of change of the 2nd rate of change to scan electrode in during resetting.That is, when the plasma display panel temperature was low, the degree of tilt of declivity signal was slower.
Analysis is regulated the reasons are as follows of declivity voltage of signals rate of change according to the plasma display panel temperature.
Most electric charges distribute in the discharge string, these electric charges are divided into two time-likes greatly, can be divided into: the voltage that provided is provided, be located at scan electrode, keep the wall electric charge of contributing for discharge on electrode or the addressing electrode and, small to discharge process, be suspended in the space charge in space in the discharge string.
When the plasma display panel temperature descends, for example the plasma display panel temperature approximately from 25 degree (℃) drop to about 10 degree (℃) when following, can reduce the energy of the interior electric charge of discharge string.Then, can reduce space charge and wall charge bonded in the discharge string and be neutralized the ratio of (Neutralization), amount of this expression wall electric charge is more.
That is, when the plasma display panel temperature was low, discharge string inner wall charge amount was more, and driving voltage is lower.
Thus, when substrate temperature is lower the 1st temperature, strengthen the size of the per hour voltage change ratio of the 1st declivity signal that provides to scan electrode, then strong discharge takes place in moment during remembering, and therefore can see bright spot on picture.
On the contrary, reduce the per hour voltage change ratio of the 1st declivity signal, then not only can evenly eliminate the wall electric charge, can also discharge by weakening memory, thereby prevent bright spot.That is, the electricity that misplaces of bright spot can be prevented, the image quality that is embodied can be improved thus.
The relation of analyzing the 1st rate of change and the 2nd rate of change with reference to following table 1 is as follows.
Table 1
| A/B | Bright spot | Driving time |
| 0.05 | ◎ | × |
| 0.12 | ◎ | × |
| 0.18 | ◎ | ○ |
| 0.24 | ◎ | ○ |
| 0.32 | ◎ | ◎ |
| 0.41 | ◎ | ◎ |
| 0.49 | ◎ | ◎ |
| 0.67 | ◎ | ◎ |
| 0.75 | ◎ | ◎ |
| 0.80 | ○ | ◎ |
| 0.90 | ○ | ◎ |
| 0.97 | ○ | ◎ |
| 1.10 | × | ◎ |
| 1.22 | × | ◎ |
Table 1 is, from 0.05 to 1.22 changes per hour voltage change ratio size of the 1st declivity signal, i.e. the per hour voltage change ratio size of the 1st rate of change (A) and the 2nd declivity signal is promptly the 2nd rate of change (B) ratio A/B) time, observe the generation of bright spot, the data of the deficiency of prediction driving time.
When observing bright spot, Hei An darkroom shows under the state of specifying image the generation of multidigit observer's sense organ evaluation bright spot, the mean value of the data that employing is estimated on the picture around.
In the table 1, X represents that the excessive generation of brightness or driving time are not enough and it is bad to represent, zero expression better, ◎ represents to prevent that bright spot from taking place or fully guarantee driving time, therefore represents fine.
Analyze the side of bright spot, then A/B is more than 0.05 0.75 when following, and the 1st rate of change is compared fully little with the 2nd rate of change.That is, the degree of tilt of the 1st declivity signal is fully slow.Therefore, when the memory discharge in the 1st temperature is fully weak, can evenly eliminate the wall electric charge, can prevent effectively that thus bright spot from misplacing.Therefore, fine.
And A/B is more than 0.80 0.97 when following, misplaces electricity though bright spot may take place, and its degree is very faint, so better.
On the contrary, A/B is 1.10 when above, and the 1st rate of change may be excessive.That is, the degree of tilt of the 1st declivity signal can be very steep.Then, the intensity of memory discharge is strong excessively, and bright spot misplaces electricity and can frequently take place, and is therefore very poor.
The analysis-driven time, then A/B is more than 0.05 0.12 when following, and the 1st rate of change and the 2nd rate of change can be too small.That is, the degree of tilt of the 1st declivity signal is excessively slow, and the length during the memory is long thus.Then, whole driving time can be not enough and very poor.
On the contrary, A/B is 0.32 when above, and the 1st rate of change and the 2nd rate of change are fully big.Therefore, length is fully disconnected and fine during the memory.
And A/B is more than 0.18 0.24 when following, better.
Consider above table 1 content, then the 1st rate of change (A) is preferably more than 0.18 times below 0.97 times of the 2nd rate of change (B), is preferably more than 0.32 times below 0.75 times.
Fig. 6 for introduce can be during remembering to the picture of keeping the drive signal that electrode provides.
Analysis chart 6 during the memory during the replacement, can provide the 1st to keep offset signal (Vzb1) to keeping electrode.Then, can more even elimination wall electric charge.
And, in the address period after can be during resetting, provide the 2nd to keep offset signal (Vzb2) to keeping electrode.Then, can address period reduce keep that electrode causes what is done, thus can the stabilization address discharge.
The voltage that the 1st voltage and the 2nd of keeping offset signal (Vzb1) is kept offset signal (Vzb2) is Vz, can be actual identical.
And the 1st keeps the voltage that offset signal and the 2nd is kept offset signal, can be higher than the voltage of earth level (GND), or provide during the keeping after being less than or equal to during the replacement keep voltage of signals (Vs).
And, can keep offset signal (Vzb1) and the 2nd the 1st and keep between the offset signal (Vzb2), can provide dropping signal (fs) to keeping electrode again.Then, prevent that terminal the generation discharged by force during remembering, thereby improve contrast (Contrast) characteristic.The size of the per hour voltage change ratio of dropping signal can be actual identical with the size of the per hour voltage change ratio of declivity signal.
Fig. 7 is the picture of another example of introducing the plasma display system operation of the present invention's one example.To omit the above concrete content of introducing among Fig. 7.
Analysis chart 7, then shown in (b), when the plasma display panel temperature is higher the 2nd temperature, in during the replacement of the 1st son field (Sub-Field), providing the size of voltage change ratio to scan electrode is the 1st declivity signal of the 1st rate of change, in during the replacement of the 2nd son field, providing the size of voltage change ratio to scan electrode is the 2nd declivity signal of the 2nd rate of change.At this, the 1st rate of change is littler than the 2nd rate of change.At this, the 1st son field is preferably in the front that is positioned at the 2nd son field on the time, and the 1st son field is preferably in the central earliest time configuration of a plurality of son fields of frame.That is, in the middle of the 1st son field and the 2nd son field, be arranged in the degree of tilt of the 1st declivity signal of the 1st son field of front on the time, be made as slower than the 2nd declivity signal tilt degree in the 2nd son field.
So, be arranged on time during the replacement of son field of front, will the degree of tilt of the declivity signal that provides to scan electrode be set relatively slowly, then can slowly eliminate the wall electric charge, can homogenising its distribute and the wall CHARGE DISTRIBUTION of son field after can stablizing.
And, the plasma display panel temperature is when being lower than the 1st temperature of the 2nd temperature, shown in (a), during the replacement of the 1st son field, providing the voltage change ratio size to scan electrode is the 3rd declivity signal of the 3rd rate of change, in during the replacement of the 2nd son field, can provide the voltage change ratio size to scan electrode is the 4th declivity signal of the 4th rate of change.
At this, the 3rd rate of change can be identical with the 1st rate of change reality of (b), and the 4th rate of change can be different with the 2nd rate of change of (b).Best the 4th rate of change is littler than the 2nd rate of change.
That is, when the temperature of plasma display panel reduces, the degree of tilt of the declivity signal of the 2nd son field that is positioned at the back on the time is set slowly.Then, the bright spot that can prevent temperature misplaces.
Fig. 8 is for introducing the picture during resetting in advance.
Analysis chart 8, can comprise pre-replacement again before during the replacement of at least one son field in the middle of a plurality of son fields during (Pre-ResetPeriod).During this pre-replacement, during the replacement of scan electrode, provide and be provided to the 1st signal of the declivity signal identical polar of scan electrode, corresponding with this 1st signal, can provide the 2nd signal with the 1st signal opposite polarity to keeping electrode.
The 2nd voltage of signals size can with keep during in provide keep voltage of signals, it is roughly the same promptly to keep voltage (Vs).
So, during pre-the replacement in, provide the 1st signal to scan electrode, when keeping electrode the 2nd signal is provided, the wall electric charge (WallCharge) of the certain polarity of accumulation on scan electrode is at the wall electric charge of keeping accumulation and scan electrode opposite polarity on the electrode.For example, accumulation sun (+) property wall electric charge (WallCharge) on scan electrode is being kept cloudy (-) property wall of accumulation electric charge on the electrode.
Thus, cause during the replacement after can be during pre-the replacement that the establishment of abundant intensity discharges, can fully stablize thus and carry out initialization.
Simultaneously, though in during resetting to scan electrode provide on tiltedly voltage of signals diminish, also can cause the establishment discharge of abundant intensity.
From guaranteeing the viewpoint of driving time, in the middle of the son field of frame, the time is the son field that is arranged in the earliest, comprise between can be during resetting during the pre-replacement or, 2 or 3
Or 3
The replacement of son field during before comprise during the pre-replacement.
Fig. 9 is a picture of introducing another form one example of reset signal.
Analysis chart 9, then shown in (a), go up oblique signal can comprise with the 1st degree of tilt rise the 1st on oblique signal, with rise than slower the 2nd degree of tilt of the 1st degree of tilt the 2nd on oblique signal.
Then, can obtain to take place to create before the discharge, the voltage of the scan electrode that rises rapidly, during the generation establishment discharge, the effect of the voltage of the scan electrode that relatively slowly rises.Simultaneously, can prevent that length is long between startup stage, stabilization is created discharge more simultaneously.
And shown in (b), the declivity signal can begin from the voltage (V40) actual identical with the voltage of earth level (GND) to descend.
Claims (7)
1, a kind of plasma display system, it is characterized in that: it comprises the plasma display panel that disposes scan electrode, in during the replacement of at least one son field in the middle of a plurality of son fields of frame, provide the drive division of the declivity signal that voltage descends gradually to above-mentioned scan electrode; When above-mentioned plasma display panel temperature was the 2nd temperature, the size of above-mentioned declivity voltage of signals rate of change was the 2nd rate of change; Above-mentioned plasma display panel temperature is when being lower than the 1st temperature of above-mentioned the 2nd temperature, and declivity voltage of signals rate of change size is the 1st rate of change less than above-mentioned the 2nd rate of change.
2, plasma display system according to claim 1 is characterized in that: above-mentioned the 1st rate of change is more than 0.18 times below 0.97 times of the 2nd rate of change.
3, plasma display system according to claim 2 is characterized in that: above-mentioned the 1st rate of change is more than 0.32 times below 0.75 times of the 2nd rate of change.
4, plasma display system according to claim 1, it is characterized in that: during the pre-replacement of above-mentioned drive division before during the above-mentioned replacement, provide the 1st signal with above-mentioned declivity signal identical polar to above-mentioned scan electrode, corresponding with above-mentioned the 1st signal, provide the 2nd signal with above-mentioned the 1st signal opposite polarity to the above-mentioned electrode of keeping.
5, a kind of plasma display system is characterized in that: it comprises the plasma display panel that disposes scan electrode; In the middle of a plurality of son fields of frame during the replacement of at least one son field in, the drive division of the declivity signal that voltage descends gradually is provided to above-mentioned scan electrode, above-mentioned drive division provides and the corresponding dropping signal of above-mentioned declivity signal to the above-mentioned electrode of keeping in during above-mentioned replacement, when the temperature of above-mentioned plasma display panel is the 2nd temperature, the size of above-mentioned declivity voltage of signals rate of change is the 2nd rate of change, the temperature of above-mentioned plasma display panel is when being lower than the 1st temperature of above-mentioned the 2nd temperature, and above-mentioned declivity voltage of signals rate of change size is the 1st rate of change less than above-mentioned the 2nd rate of change.
6, plasma display system according to claim 5, it is characterized in that: above-mentioned drive division can be before above-mentioned dropping signal, provide the 1st to keep offset signal to the above-mentioned electrode of keeping, after above-mentioned dropping signal, provide the 2nd to keep offset signal to the above-mentioned electrode of keeping.
7, plasma display system according to claim 6, it is characterized in that: the above-mentioned the 1st keeps offset signal and the 2nd, and to keep the voltage of offset signal identical mutually, the above-mentioned the 1st keeps the voltage that offset signal and the 2nd is kept offset signal, than the voltage height of earth level, or provide during the keeping after being less than or equal to during the replacement and keep voltage of signals.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020070102171A KR20090036881A (en) | 2007-10-10 | 2007-10-10 | Plasma display apparatus |
| KR1020070102171 | 2007-10-10 |
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| Publication Number | Publication Date |
|---|---|
| CN101447164A true CN101447164A (en) | 2009-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200810129691XA Pending CN101447164A (en) | 2007-10-10 | 2008-08-05 | Plasma display apparatus |
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| KR (1) | KR20090036881A (en) |
| CN (1) | CN101447164A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568371A (en) * | 2012-01-19 | 2012-07-11 | 安徽鑫昊等离子显示器件有限公司 | Method for driving plasma display device |
-
2007
- 2007-10-10 KR KR1020070102171A patent/KR20090036881A/en not_active Application Discontinuation
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- 2008-08-05 CN CNA200810129691XA patent/CN101447164A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568371A (en) * | 2012-01-19 | 2012-07-11 | 安徽鑫昊等离子显示器件有限公司 | Method for driving plasma display device |
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| KR20090036881A (en) | 2009-04-15 |
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