WO2009096639A1 - Appareil d'affichage à plasma et procédé de commande - Google Patents

Appareil d'affichage à plasma et procédé de commande Download PDF

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Publication number
WO2009096639A1
WO2009096639A1 PCT/KR2008/003962 KR2008003962W WO2009096639A1 WO 2009096639 A1 WO2009096639 A1 WO 2009096639A1 KR 2008003962 W KR2008003962 W KR 2008003962W WO 2009096639 A1 WO2009096639 A1 WO 2009096639A1
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WIPO (PCT)
Prior art keywords
scan
plasma display
electrodes
period
display apparatus
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Application number
PCT/KR2008/003962
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English (en)
Inventor
Ki Rack Park
Jong Woon Bae
Seong Hwan Ryu
Original Assignee
Lg Electronics Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lg Electronics Inc. filed Critical Lg Electronics Inc.
Publication of WO2009096639A1 publication Critical patent/WO2009096639A1/fr

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Classifications

    • 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G5/00—Component parts or accessories for scaffolds
    • E04G5/06—Consoles; Brackets
    • E04G5/062—Consoles; Brackets specially adapted for attachment to building walls
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/32—Safety or protective measures for persons during the construction of buildings
    • E04G21/3204—Safety or protective measures for persons during the construction of buildings against falling down
    • E04G21/3219—Means supported by the building wall, e.g. security consoles
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/32—Safety or protective measures for persons during the construction of buildings
    • E04G21/3261—Safety-nets; Safety mattresses; Arrangements on buildings for connecting safety-lines
    • E04G21/3266—Safety nets
    • 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
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0202—Addressing of scan or signal lines
    • G09G2310/0205—Simultaneous scanning of several lines in flat panels
    • 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
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0202—Addressing of scan or signal lines
    • G09G2310/0213—Addressing of scan or signal lines controlling the sequence of the scanning lines with respect to the patterns to be displayed, e.g. to save power
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Definitions

  • the present invention relates to a plasma display apparatus and a method of driving the same and, more particularly, to a plasma display apparatus and a method of driving a plasma display panel, in which a driving signal supplied to the plasma display panel is changed depending on image data.
  • a plasma display panel includes an upper substrate, a lower substrate and a barrier rib defining one unit cell between the upper and lower substrates.
  • Each cell is filled with an inert gas containing a major discharge gas and a small amount of xenon, such as neon (Ne), helium (He) or a mixed gas of neon and helium (Ne+He).
  • xenon such as neon (Ne), helium (He) or a mixed gas of neon and helium (Ne+He).
  • the inert gas When discharge is generated by a high-frequency voltage, the inert gas generates vacuum ultraviolet rays, and a fluorescent material formed between barrier ribs is excited with the vacuum ultraviolet rays, thereby displaying images. Since such a plasma display panel is thin and light, it has come into the spotlight as a next-generation display apparatus.
  • a plasma display apparatus includes: a plasma display panel including an upper substrate having a plurality of scan electrodes and sustain electrodes formed thereon and a lower substrate having a plurality of address electrodes formed thereon; and a driver that supplies driving signals to the plasma display panel.
  • a plasma display panel including an upper substrate having a plurality of scan electrodes and sustain electrodes formed thereon and a lower substrate having a plurality of address electrodes formed thereon; and a driver that supplies driving signals to the plasma display panel.
  • a method of driving a plasma display panel includes: supplying scan signals to the plurality of scan electrodes divided into a plurality of groups; calculating similarity of data to be displayed with respect to two or more scan electrodes belonging to any one of the plurality of groups; and when the calculated similarity is more than a reference value, supplying scan signals to the two or more scan electrodes, the scan signals having at least some scan signal supply periods overlapped with each other.
  • FIG. 1 is a perspective view illustrating an embodiment of the structure of a plasma display panel according to the present invention
  • FIG. 2 is a view illustrating an embodiment of the electrode arrangements of the plasma display panel
  • FIG. 3 is a timing diagram illustrating an embodiment of a method of time-dividing and driving the plasma display panel by dividing one frame into a plurality of subfields
  • FIG. 4 is a timing diagram illustrating an embodiment of driving signals for driving the plasma display panel with respect to one divided subfield of FIG. 3
  • FIG. 5 is a view illustrating an embodiment of the construction of a driving apparatus for driving the plasma display panel
  • FIG. 16 FIG.
  • FIG. 6 is an internal block diagram of a plasma display apparatus illustrating according to an embodiment of the present invention.
  • FIG. 7 is a view illustrating an embodiment of a method of detecting similarity of data between scan electrode lines;
  • FIG. 8 is a timing diagram illustrating anther embodiment of driving signals for driving the plasma display panel according to the present invention.
  • FIGS. 9 to 11 are timing diagrams illustrating still anther embodiment of driving signals for driving the plasma display panel according to the present invention; and
  • FIGS. 12 to 15 are timing diagrams illustrating embodiments of a method of driving the plasma display panel by dividing a plurality of scan electrodes.
  • FIG. 1 is a perspective view illustrating an embodiment of the structure of a plasma display panel.
  • the plasma display panel includes a scan electrode 11 and a sustain electrode 12 (that is, a sustain electrode pair), which are formed over an upper substrate 10, and address electrodes 22 formed over a lower substrate 20.
  • the sustain electrode pair 11 and 12 includes transparent electrodes 11a and 12a generally formed from indium-tin-oxide (ITO), and bus electrodes l ib and 12b.
  • ITO indium-tin-oxide
  • the bus electrodes 1 Ib and 12b may be formed from metal, such as silver (Ag) or chrome (Cr), a stack type of Cr/copper (Cu)/Cr or Cr/aluminum (Al)/Cr.
  • the bus electrodes 1 Ib and 12b are formed on the transparent electrodes 1 Ia and 12a, and function to decrease a voltage drop caused by the transparent electrodes 11a and 12a with a high resistance.
  • the sustain electrode pair 11 and 12 may have a stack structure of the transparent electrodes 1 Ia and 12a and the bus electrodes 1 Ib and 12b, but also include only the bus electrodes 1 Ib and 12b without the transparent electrodes 11a and 12a. This structure is advantageous in that it can save the manufacturing cost of the plasma display panel because the transparent electrodes 11a and 12a are not used.
  • Black matrices (BM) 15 are arranged between the transparent electrodes 11a and 12a and the bus electrodes 1 Ib and 12b of the scan electrode 11 and the sustain electrode 12.
  • the black matrix 15 has a light-shielding function of absorbing external light generated outside the upper substrate 10 and decreasing reflection of the light and a function of improving the purity and contrast of the upper substrate 10.
  • the black matrices 15 in accordance with the embodiment of the present invention are formed over the upper substrate 10.
  • Each black matrix 15 may include a first black matrix 15 formed at a location where it is overlapped with a barrier rib 21, and second black matrices l ie and 12c formed between the transparent electrodes 11a and 12a and the bus electrodes 1 Ib and 12b.
  • the first black matrix 15, and the second black matrices l ie and 12c which are also referred to as black layers or black electrode layers, may be formed at the same time and, therefore, may be connected physically. Alternatively, they may not be formed at the same time and, therefore, may not be connected physically.
  • An upper dielectric layer 13 and a protection layer 14 are laminated over the upper substrate 10 in which the scan electrodes 11 and the sustain electrodes 12 are formed in parallel. Charged particles generated by discharge are accumulated on the upper dielectric layer 13.
  • the upper dielectric layer 13 and the protection layer 14 may function to protect the sustain electrode pair 11 and 12.
  • the protection layer 14 functions to protect the upper dielectric layer 13 from sputtering of charged particles generated at the time of gas discharge and also increase emission efficiency of secondary electrons.
  • the protection layer 14 is formed of a material with a high secondary electron emission coefficient, e.g., magnesium oxide (MgO).
  • the address electrodes 22 cross the scan electrodes 11 and the sustain electrodes 12.
  • a lower dielectric layer 24 and the barrier ribs 21 are formed over a lower substrate 20 over which the address electrodes 22 are formed.
  • Phosphor layers 23 are formed on the surfaces of the lower dielectric layer 24 and the barrier ribs 21.
  • the phosphor layer 23 is excited with ultraviolet rays generated during the discharge of a gas, thus generating a visible ray of one of red (R), green (G), and blue (B).
  • Discharge spaces between the upper/lower substrates 10 and 20 and the barrier ribs 21 are injected with an inert mixed gas for discharge, such as He+Xe, Ne+Xe or He+Ne+Xe.
  • G, and B discharge cells are arranged on the same line. However, they may be arranged in different forms.
  • the R, G, and B discharge cells may also have a delta type arrangement of a triangle.
  • the widths of the respective discharge cells may be the same. Alternatively, the width of at least one of the R, G, and B discharge cells may be different from that of the other discharge cells.
  • the barrier rib 21 functions to partition discharge cells physically and prevent ultraviolet rays, which are generated by discharge, and a visible ray from leaking to neighboring discharge cells.
  • the barrier ribs 21 may include barrier ribs of a stripe type, a well type, a delta type, a hive type, and the like.
  • each of the barrier rib 21 has a longitudinal barrier rib 21a and a traverse barrier rib 21b formed in a closed type.
  • the embodiment of the present invention may also be applied to not only the structure of the barrier ribs 21 shown in FIG. 1, but also various forms of structures of the barrier ribs 21.
  • the present embodiment may be applied to a differential type barrier rib structure in which the longitudinal barrier rib 21a and the traverse barrier rib 21b have different heights, a channel type barrier rib structure in which a channel, which can be used as an exhaust passage, is formed in at least one of the longitudinal barrier rib 21a and the traverse barrier rib 21b, a hollow type barrier rib structure in which a hollow is formed in at least one of the longitudinal barrier rib 21a and the traverse barrier rib 21b, and the like.
  • the traverse barrier rib 21b may preferably have a higher height than the longitudinal barrier rib 21a.
  • a channel or hollow may be preferably formed in the traverse barrier rib 21b.
  • FIG. 2 is a view illustrating an embodiment of electrode arrangements of the plasma display panel. It is preferred that a plurality of discharge cells constituting the plasma display panel be arranged in a matrix form as illustrated in FIG. 2.
  • the plurality of discharge cells are disposed at the intersections of scan electrode lines Yl to Ym, sustain electrodes lines Zl to Zm, and address electrodes lines Xl to Xn, respectively.
  • the scan electrode lines Yl to Ym may be driven sequentially or at the same time.
  • the sustain electrode lines Zl to Zm may be driven at the same time.
  • the address electrode lines Xl to Xn may be driven with them being divided into even-numbered lines and odd- numbered lines, or driven sequentially.
  • FIG. 3 is a timing diagram illustrating an embodiment of a method of time-dividing and driving the plasma display panel by dividing one frame into a plurality of subfields.
  • a unit frame may be divided into a predetermined number (for example, eight subfields SFl, ..., SF8) in order to realize a gray level display.
  • Each of the subfields SFl, ..., SF8 is divided into a reset period (not shown), address periods Al, ..., A8, and sustain periods Sl, ..., S8.
  • the reset period may be omitted in at least one of the plurality of subfields.
  • the reset period may exist only in the first subfield, or exist only in a subfield approximately between the first subfield and the entire subfields.
  • each of the sustain periods Sl, ..., S8 a sustain pulse is alternately applied to the scan electrodes Y and the sustain electrodes Z. Accordingly, sustain discharge is generated in discharge cells on which wall charges are formed in the address periods A1, ..., A8.
  • the luminance of the plasma display panel is proportional to the number of sustain discharge pulses within the sustain periods Sl, ..., S8, which is occupied in a unit frame.
  • FIG. 4 is a timing diagram illustrating an embodiment of driving signals for driving the plasma display panel with respect to one divided subfield of FIG. 3.
  • Each subfield includes a pre-reset period where positive wall charges are formed on the scan electrodes Y and negative wall charges are formed on the sustain electrodes Z, a reset period where discharge cells of the entire screen are reset using wall charge distributions formed in the pre-reset period, an address period where discharge cells are selected, and a sustain period where the discharge of selected discharge cells is sustained.
  • the reset period includes a set-up period and a setdown period.
  • a ramp-up waveform is applied to the entire scan electrodes at the same time, so that a minute discharge occurs in the entire discharge cells and wall charges are generated accordingly.
  • a ramp-down waveform that falls from a positive voltage is applied to the entire scan electrodes Y at the same time, so erase discharge is generated in the entire discharge cells. Accordingly, unnecessary charges are erased from the wall charges generated by the set-up discharge and spatial charges.
  • a scan signal of a negative polarity is applied to the scan electrodes Y, and a data signal of a positive polarity corresponding to the scan signal is applied to the address electrodes X.
  • Address discharge is generated by a voltage difference between the scan signal and the data signal and a wall voltage generated during the reset period, so the cells are selected. Meanwhile, a signal that maintains a sustain voltage is applied to the sustain addresses during the setdwon period and the address period.
  • a sustain pulse having a sustain voltage Vs is alternately applied to the scan electrode and the sustain electrode, so sustain discharge is generated between the scan electrode and the sustain electrode in a surface discharge form.
  • an erase period in which wall charges remaining in the scan electrodes or the sustain electrodes of an on-cell selected in the address period are erased by generating weak discharge may be further included posterior to the sustain period.
  • the waveforms of driving signals supplied from the first subfield (ISF), middle subfields (2SF to 9SF), and the last subfield (10SF) may be different from one another.
  • FIG. 5 is a view illustrating an embodiment of the construction of a driving apparatus for driving the plasma display panel.
  • a heat sink frame 30 is disposed on the rear surface of the panel, and functions to support the panel and also absorb and dissipate heat generated from the panel.
  • a printed circuit board 40 for applying driving signals to the panel is also disposed on the rear surface of the heat sink frame 30.
  • the printed circuit board 40 may include an address driver 50 for supplying a driving signal to the address electrodes of the panel, a scan driver 60 for supplying a driving signal to the scan electrodes of the panel, a sustain driver 70 for supplying a driving signal to the sustain electrodes of the panel, a driving controller 80 for controlling the driving circuits, and a power supply unit (PSU) 90 for supplying power to each driving circuit.
  • an address driver 50 for supplying a driving signal to the address electrodes of the panel
  • a scan driver 60 for supplying a driving signal to the scan electrodes of the panel
  • a sustain driver 70 for supplying a driving signal to the sustain electrodes of the panel
  • driving controller 80 for controlling the driving circuits
  • PSU power supply unit
  • the address driver 50 is configured to supply the driving signal to the address electrodes formed in the panel so that only a discharge cell, which is discharged, of a plurality of discharge cells formed in the panel is selected.
  • the address driver 50 may be disposed on one of upper and lower sides of the panel or both on them depending on a single scan method or a dual scan method.
  • the address driver 50 may include a data IC (not shown) for controlling the current applied to the address electrode. Switching for controlling the applied current may be generated in the data IC, so a great amount of heat may be generated from the data IC. Accordingly, a heat sink (not shown) for dissipating heat generated during the control process may be installed in the address driver 50.
  • the scan driver 60 may include a scan sustain board 62 connected to the driving controller 80, and a scan driver board 64 that connects the scan sustain board 62 and the panel.
  • the scan driver board 64 may be divided into two parts (for example, an upper part and a lower part). Unlike the construction shown in FIG. 5, the number of the scan driver board 64 may be one or plural.
  • a scan IC 65 for supplying a driving signal to the scan electrode of the panel may be disposed in the scan driver board 64.
  • the scan IC 65 may apply reset, scan and sustain signals to the scan electrode consecutively.
  • the sustain driver 70 supplies a driving signal to the sustain electrode of the panel.
  • the driving controller 80 may convert an input image signal into data, which will be supplied to the address electrodes, based on signal processing information stored in memory by performing a specific signal process on the input image signal, and arrange the converted data according to a scan sequence, and so on. Further, the driving controller 80 may control driving signal supply time points of the driving circuits by applying a timing control signal to the address driver 50, the scan driver 60, and the sustain driver 70.
  • FIG. 6 is an internal block diagram of a plasma display apparatus illustrating according to an embodiment of the present invention (see FIG. 5).
  • the plasma display apparatus includes a digital image output
  • the digital image output 110 converts an input image signal into image data including unit frames, each having a plurality of subfields.
  • the image data corrector 100 receives image data inputted from the digital image output 110.
  • the image data corrector 100 analyzes the image data and determines similarity of data for each scan electrode line in the first subfield of the plurality of subfields. Then, scan electrode lines, each having similarity greater than a reference value, are grouped.
  • the similarity may be determined using correspondence of data between the respective scan electrode lines by analyzing the arrangement of image data, the ratio of the number of discharge cells, or other methods.
  • the similarity is determined with the correspondence of data.
  • a buffer (not shown) that temporarily stores image data is provided to save time for determining the correspondence of data.
  • the similarity of data is determined with the number of turned-on discharge cells in which address discharge will be generated, it is advantageous in that time for determining the similarity is shortened.
  • FIG. 7 is a view illustrating an embodiment of a method of the image data corrector
  • the image data corrector 100 determines whether discharge cells are turned on/off for each scan electrode lines Ya and Yb with respect to the respective plurality of address electrode lines Xl to Xn.
  • that the discharge cell of the scan electrode line Ya with respect to the address electrode Xl line is turned on or off means that sustain discharge is generated or is not generated in the discharge cell positioned at an intersection region of the address electrode line Xl and the scan electrode line Ya.
  • the image data corrector 100 determines whether the discharge cells of the scan electrode lines Ya and Yb are correspondingly turned on or off based on the determined result.
  • the discharge cells of the scan electrode lines Ya and Yb are correspondingly turned on/off with respect to the address electrode lines Xl, X2, X3, X6, X7 and Xn, and the discharge cells of the scan electrode lines Ya and Yb are not correspondingly turned on/off with respect to the address electrode lines X4, X5 and Xn-I.
  • the image data corrector 100 detects the ratio of the number of address electrode lines of the entire address electrode lines Xl to Xn, with respect to which the discharge cells of the scan electrode lines Ya and Yb are correspondingly turned on/off, as similarity of data between the scan electrode lines Ya and Yb.
  • the similarity of data between the scan electrode lines Ya and Yb is about 0.99 (1900/1920).
  • FIG. 7 the embodiment of a method of detecting similarity of data between two scan electrode lines according to the present invention has been described. However, the detection method described with reference to FIG. 7 may be applied to a method of detecting similarity of data among 3 or more scan electrode lines.
  • the image data corrector 100 determines that the discharge cells of the scan electrode lines are correspondingly turned on/off on the address electrode line.
  • the image data corrector 100 groups scan electrode lines having high similarity, i.e., higher than a reference value as one group.
  • the one scan group is indexed to be recognized. For example, a new scan electrode line number is designated to the one group, and the new scan electrode line number shows what scan electrode lines are included in the one scan group or whether the one scan group includes original scan electrode line numbers.
  • the image data corrector 100 may control a scan order of scan groups and scan electrode lines that are not grouped.
  • the scan order may be controlled by the driving controller 80.
  • the scan groups are controlled to be scanned so that sustain discharge is generated just after address discharge. Therefore, degradation of image quality caused by light emission due to address discharge can be reduced.
  • the reference value may be a fixed value or may be varied. The variation of the reference value will be described below. Preferably, the reference value is 95% to 100%. When the reference value is 95% or more, degradation of image quality caused by simultaneous scans can be reduced.
  • the driving controller 80 controls an address driver, a scan driver and a sustain driver, and controls a scan signal to be simultaneously applied to the scan group during an address period.
  • the driving controller 80 analyzes corrected and rearranged image data and controls a scan signal to be sequentially applied to scan electrode lines and scan groups.
  • the scan signal is simultaneously applied to scan electrode lines that belong to the same scan group.
  • the driving controller 80 applies a data signal to correspond to the scan signal simultaneously applied to the scan group.
  • the driving controller 80 may control the number of sustain discharges to be increased in a subfield to which the scan group belongs.
  • the address period is shortened, and therefore, sustain discharge can be increased.
  • an image can be brighter by shortening the address period.
  • driving time is relatively lengthened, and therefore, time for solving driving problems is more increased. Accordingly, image quality can be more improved.
  • FIG. 8 is a timing diagram illustrating anther embodiment of driving signals for driving the plasma display panel according to the present invention.
  • the driving signal including scan signals applied to some scan electrode lines constituting the plasma display panel.
  • the respective scan electrode lines are numbered by increasing 1 from the scan electrode line Yi.
  • the scan electrode lines Yi+3, Yi+4 and Yi+5 are grouped and numbered as YGk.
  • the driving controller 80 sequentially applies scan signals to the scan electrode lines
  • the driving controller 80 sequentially applies scan signals to the scan electrode lines Yi+6 to Yi+8.
  • the width d of the scan signals applied to the scan electrode lines that does not belong to the scan group is 0.6 ⁇ s to 1.1 ⁇ s.
  • the width of scan signals sequentially applied to scan electrode lines, the number of which is increased, becomes narrow, and address erroneous discharge may highly occur accordingly.
  • the number of scan electrode lines is 1080 or more, and the length of one frame is about 16.67ms. Therefore, the width of a scan signal should be 1.1 ⁇ s or less in order to secure a panel-driving margin.
  • the width of a generally used scan signal is 1.2 ⁇ s to 1.5 ⁇ s.
  • a scan signal with a width of 1.5 ⁇ s is applied to a full HD panel having 1080 scan electrode lines, it is assumed that one frame is divided into 12 subfields. Then, the time taken to apply scan signals in one frame is about 19.44ms (1080*1.5 ⁇ s*12), which exceeds 16.67ms, that is the length of one frame.
  • the time taken to apply scan signals in one frame is about 15.55ms (1080*1.2 ⁇ s*12).
  • 1.12ms (16.67ms-15.55ms considering not only an address period at which scan signals are applied but also reset and sustain periods, stable driving of the panel is almost impossible with 1.12ms (16.67ms-15.55ms).
  • the jitter characteristic means that discharge is delayed, and therefore, address discharge occurs after a certain time elapses from at the time when a scan signal is applied.
  • Table 1 lists whether address erroneous discharge occurred depending on a change in the width of a scan signal. [88] Table 1 [Table 1] [Table ]
  • the width of a scan signal is preferably 0.7//S to l.l ⁇ s in order to secure a panel-driving margin and prevent address erroneous discharge.
  • a scan signal is simultaneously applied to a plurality of scan electrode lines with high similarity, so that the time taken to apply scan signals to the entire scan electrode lines can be saved.
  • the time saved by decreasing the length of a scan period stabilizes address or sustain discharge, so that quality of a display image can be improved, the initialization of a discharge cell can be reinforced, or the resolution of a display image can be enhanced.
  • the driving controller 80 increases the length of a reset period by the saved time, so that the initialization of a discharge cell can be reinforced, and address and sustain discharge performed after the initialization of a discharge cell can be stabilized accordingly.
  • the reset period the length of which is increased, two or more reset signals including at least one of setup and setdown periods can be supplied, the occurrence of spot erroneous discharge can be prevented by reducing the slope of the setup or setdown period of a reset signal, or a separate stabilization signal can be supplied before the address period.
  • the driving controller 80 increases the width of the scan signal by the saved time, so that the jitter characteristics are improved, and thus, address erroneous discharge due to the discharge delay can be reduced.
  • the time saved by simultaneously applying a scan signal in the entire one frame may be used to increase the width of scan signals applied in subfields with weak jitter characteristics, e.g., the first to third subfields positioned at the front portion of the one frame.
  • the driving controller 80 may increase the length of the sustain period by the saved time.
  • the width of at least some of the plurality of sustain signals supplied in the sustain period, the length of which is increased, can be increased.
  • sustain discharge can be stabilized by increasing the width of the first sustain signal of the plurality of sustain signals supplied in the sustain period, or initialization efficiency of discharge cells in a reset period of the next subfield can be enhanced by increasing the width of the last sustain signal.
  • the time saved by simultaneously supplying a scan signal in the entire one frame may be used to increase the first or last sustain signal supplied in the first to third subfields of a plurality of subfields, positioned at the front portion of the one frame. This is because sustain erroneous discharge may highly occur in the first to third subfields of the plurality of subfields constituting one frame.
  • the number of sustain signals supplied in the sustain period, the length of which is lengthened, is increased, so that the high gray level expression of a display image can be enhanced.
  • the driving controller 80 may increase the number of subfields constituting one frame by the saved time. For example, in the event that the time saved by simultaneously applying a scan signal is sufficient, the low gray level expression of a display image can be improved by adding a half gray level subfield in which address discharge is generated.
  • FIGS. 9 to 11 are timing diagrams illustrating still anther embodiment of driving signals for driving the plasma display panel according to the present invention.
  • FIGS. 9 to 11 illustrate driving signals applied during a scan period in which scan signals are applied.
  • the width d of a scan signal applied to scan electrode lines that does not belong to a scan group is narrower than the width e of a scan signal applied to the scan group. Since there exists a spare time generated by simultaneously applying a scan signal to the scan group, the width e of the scan signal applied to the scan group is broader than the width d of the scan signal applied to the scan electrode lines that does not belong to the scan group. The width of the scan signal applied to the scan group is broadened, so that address erroneous discharge can be prevented.
  • the scan signals applied to the scan lines may be applied to have a time difference so that a supply start time and a supply end time are different although at least some periods of the scan signals are overlapped with each other. Accordingly, a noise or ripple current generated by simultaneously applying scan signals can be reduced.
  • the scan signal is a square wave that falls from a scan bias voltage Vsc_b to a scan voltage Vsc after a predetermined period.
  • the scan signal is divided into a falling period tr that falls from a scan bias voltage Vsc_b to a scan voltage Vsc, a sustain period ts that the scan voltage Vsc is sustained, and a rising period that rises from the scan voltage Vsc to the scan bias voltage Vsc_b-
  • the falling period tr refers to a period of tl to t3 or t2 to t4
  • the sustain period ts refers to a period of t5 to t7 or t6 to t8.
  • a scan signal is applied to a scan electrode line Yi+3 at the time tl, and a scan signal is applied to a scan electrode line Yi+4 at the time t2 during the falling period tr.
  • a scan signal is applied to the scan electrode line Yi+3, and a scan signal is applied to the scan electrode line Yi+4 at the time t6 during the sustain period ts between the time t5 to the time t7.
  • the scan signal it is preferred that the scan signal be applied to the scan electrode line Yi+4 at the opening part of the sustain period ts, e.g., the time before the half of the sustain period ts elapses.
  • a plurality of scan electrodes formed in the panel are divided into two groups and driven, so that interaction such as crosstalk between electrodes in a high resolution panel can be reduced, and a large number of electrode lines can be effectively driven.
  • FIGS. 12 to 15 are timing diagrams illustrating embodiments of a method of driving the plasma display panel by dividing the scan electrodes of the plasma display panel into two groups.
  • the plurality of scan electrodes Y formed in the panel may be divided into two or more groups Yl and Y2.
  • the address period may be divided into first and second group scan periods in which a scan signal is supplied to each of the divided first and second groups.
  • the scan signal may be sequentially supplied to scan electrodes Yl belonging to the first group
  • the scan signal may be sequentially supplied to scan electrodes Y2 belonging to the second group.
  • the plurality of scan electrodes Y may be divided into a first group Yl placed at the even number and a second group Y2 placed at the odd number, from the top of the panel, depending on a position formed on the panel.
  • the plurality of scan electrodes Y may be divided into a first group Yl disposed on an upper side and a second group Yl disposed on a lower side, on the basis of the center of the panel.
  • the plurality of scan electrodes Y may be divided according to several methods except for the above methods. The number of the scan electrodes belonging to the first and second groups Yl and Y2, respectively, may differ.
  • a scan bias voltage Vscb2_l supplied to the second group Y2 may be increased before the second group scan period in which the scan signal is supplied to the second group Y2 after the reset period (for example, during the first group scan period) in order to reduce the loss of wall charges of a negative polarity (-) formed on the scan electrodes Y2 belonging to the second group.
  • the scan bias voltage Vscb2_l which is higher than a scan bias voltage Vscbl supplied to the first group scan electrodes Yl, may be supplied to the second group scan electrodes Y2 in order to reduce address erroneous discharge.
  • the scan bias voltage Vscb2_l supplied to the second group scan electrodes Y2 during the first group scan period may be lower than the sustain voltage Vs.
  • the scan bias voltage Vscb2_l is lower than the sustain voltage Vs, an increase of unnecessary power consumption can be prevented and spot erroneous discharge, which is generated when the amount of wall charges formed in the scan electrodes is too many, can also be reduced.
  • a third scan bias voltage Vscb3 of a negative polarity is applied to the first scan group electrodes Yl. If the scan signal is applied to the scan electrodes, a potential difference between the scan signal applied to the scan electrodes and the data signal applied to the address electrode becomes too great due to the bias voltage of a negative polarity, so discharge can be generated easily.
  • the scan bias voltage Vscbl supplied to the first group scan electrodes Yl during the first group scan period and a scan bias voltage Vscb2_2 supplied to the second group scan electrodes Y2 during the second group scan period may have a voltage of a negative polarity.
  • the scan bias voltage Vscb2_l supplied to the second group scan electrodes Y2 during the first group scan period may be a ground voltage GND, and the scan bias voltage Vcbl supplied to the first group scan electrodes Yl during the address period may be constant.
  • the scan bias voltage supplied to the second group scan electrodes Y2 during the address period may be changed. More specifically, in the address period, the scan bias voltage Vscb2_l supplied to the second group scan electrodes Y2 during the first group scan period may be higher than the scan bias voltage Vscb2_2 supplied to the second group scan electrodes Y2 during the second group scan period.
  • the scan bias voltage Vsc2_l supplied to the scan electrodes Y2 belonging to the second group during the first group scan period may have a value greater than 2.
  • a high scan bias voltage Vscb2_l may be supplied to a scan electrode to which the scan bias voltage Vsc2_l is subsequently supplied rather than a scan electrode to which the scan bias voltage Vsc2_l is first supplied, of the second group scan electrodes Y2, during the first group scan period.
  • loss of wall charges formed in the scan electrodes in the reset period can be reduced more effectively.
  • the driving waveform as described with reference to FIG. 12 may be applied to some of the plurality of subfields constituting one frame.
  • the driving waveform may be applied to at least one of subfields posterior to a second subfield.
  • FIG. 13 shows a timing diagram of another embodiment of driving signal waveforms in which the plurality of scan electrodes Y are divided into first and second groups and then sequentially supplied with scan signals. The same parts as those described with reference to FIG. 12, of description of driving waveforms shown in FIG. 13, will not be described for simplicity.
  • wall charges of a negative polarity (-) formed in the scan electrodes Y2 belonging to the second group scan electrodes Y2 may be lost during the first group scan period.
  • the amount of wall charges formed in the second group scan electrodes Y2 may be set greater than the amount of wall charges formed in the first group scan electrodes Yl in order to compensate for the loss of wall charges.
  • the amount of wall charges formed in the second group scan electrodes Y2 can be increased at a time point at which the address period begins by increasing the lowest voltage of a setdown signal supplied to the second group scan electrodes Y2 during the reset period (an absolute value is reduced), as shown in FIG. 13. Further, after the first group scan period is finished, a signal that gradually drops may be supplied to the second group scan electrodes Y2 so as to erase unnecessary wall charges.
  • the lowest voltage of a first setdown signal supplied to the second group scan electrodes Y2 during the reset period may differ from the lowest voltage of a second setdown signal supplied to the second group scan electrodes Y2 during the intermediate period "a". More specifically, the lowest voltage of the first setdown signal may be higher than the lowest voltage of the second setdown signal.
  • the lowest voltage of the first setdown signal supplied to the second group scan electrodes Y2 during the reset period may have a value greater than 2.
  • a setdown signal having a high lowest voltage may be supplied to a scan electrode to which the first setdown signal is subsequently supplied rather than a scan electrode to which the first setdown signal is first supplied, of the second group scan electrodes Y2.
  • a lowest voltage difference ⁇ V2 between the first and second setdown signals supplied to a second scan electrode Y2_2 of the second group Y2 may be greater than a lowest voltage difference ⁇ V1 between the first and second setdown signals supplied to a first scan electrode Y2_l of the second group Y2.
  • a second setdown signal that gradually drops may also be applied to the first group scan electrodes Yl during the intermediate period "a" between the first and second group scan periods, as shown in FIG. 13.
  • a circuit configuration for supplying the setdown signal may differ on a first- or second-group basis.
  • the lowest voltage of the setdown signal supplied to the first group scan electrodes Yl during the reset period may be lower than the lowest voltage of the setdown signal supplied to the second group scan electrodes Y2 during the reset period. Further, when taking the ease of a circuit configuration into consideration, the lowest voltage of the first setdown signal supplied to the first group scan electrodes Yl during the reset period may be identical to the lowest voltage of the second setdown signal supplied to the first and second group scan electrodes Yl and Y2 during the intermediate period "a".
  • falling slopes of the first and second setdown signals may be identical.
  • the lowest voltages of the first and second setdown signals can be varied as described above by controlling a width of the setdown signal (that is, falling times of the first and second setdown signals).
  • an amount of the lowest voltage of the first setdown signal supplied to the second group scan electrodes Y2 during the reset period may be in reverse proportional to an amount of the lowest voltage of the second setdown signal supplied to the second group scan electrodes Y2 during the intermediate period "a".
  • the lowest voltage of the first setdown signal supplied to one of the second group scan electrodes Y2 during the reset period becomes low, the lowest voltage of the second setdown signal supplied to the scan electrode during the intermediate period "a" may rise.
  • the second group scan electrode Y2 Since the amount of wall charges formed in the scan electrode at the start time point of the address period is decreased as the lowest voltage of the first setdown signal supplied to the second group scan electrode Y2 during the reset period is lowered, an erase amount of wall charges formed in the scan electrode can be decreased by raising the lowest voltage of the second setdown signal supplied to the scan electrode during the intermediate period "a". Accordingly, the second group scan electrode Y2 may be sustained in an appropriate wall charge state for address discharge.
  • the setdown signal may not be supplied to the second group scan electrodes Y2 during the reset period.
  • the amount of wall charges of a negative polarity (-) which are formed in the second group scan electrodes Y2 at the address period start time point, can be further increased.
  • the driving waveform as described with reference to FIG. 13 may be applied to some of a plurality of subfields constituting one frame.
  • the driving waveform may be applied to at least one of subfields posterior to a second subfield.
  • the scan bias voltage supplied to the second group scan electrodes Y2 may be varied as shown in FIG. 12.
  • the lowest voltage of the setdown signal supplied to the first and second scan group electrodes Yl and Y2 during the reset period may be set higher than the lowest voltage of the scan signal.
  • the amount of wall charges formed in the first and second scan group electrodes Yl and Y2 at the start time point of the address period can be further increased, so address discharge can be generated stably.
  • the lowest voltage of the setdown signal supplied to the second group scan electrodes Y2 during the reset period may be increased.
  • a lowest voltage difference ⁇ Vy2 between the setdown signal and the scan signal supplied to the second scan group electrodes Y2 may be set greater than a lowest voltage difference ⁇ Vyl between the setdown signal and the scan signal supplied to the first scan group electrodes Yl.
  • a falling period of the setdown signal supplied to the scan electrodes during the reset period may have a discontinuous waveform.
  • the falling period of the setdown signal may include a first falling period in which a voltage gradually drops to a first voltage, a sustain period in which the voltage is sustained to the first voltage, and a second falling period in which the voltage gradually drops from the first voltage.
  • the setdown signal may include two or more sustain periods.
  • the setdown signal having the discontinuous falling period as shown in FIG. 15 may be supplied to at least one of the first group scan electrodes Yl.
  • the setdown signal having the discontinuous falling period may be applied to at least one of the second group scan electrodes Y2 or both the first and second group scan electrodes Yl and Y2.
  • a scan signal can be simultaneously applied to the scan electrodes of the first group having similarity higher than a reference value.
  • a scan signal can be simultaneously applied to the scan electrodes of the second group having similarity higher than the reference value.
  • a scan period can be reduced, and a sustain period is lengthened using the spare time obtained by reducing the scan period, so that luminance can be enhanced, or the width of a scan signal can be broadened. Accordingly, address erroneous discharge can be prevented, and therefore, quality of a display image can be improved.

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Abstract

La présente invention porte sur un appareil d'affichage à plasma et sur un procédé de commande. L'appareil d'affichage à plasma comprend un panneau d'affichage à plasma comprenant un substrat supérieur comportant une pluralité d'électrodes de balayage et d'électrodes de maintien formées sur celui-ci, et un substrat inférieur comportant une pluralité d'électrodes d'adresse formées sur celui-ci ; et un dispositif de commande qui délivre des signaux de commande au panneau d'affichage à plasma. Dans une période d'adressage d'au moins une sous-trame d'une pluralité de sous-trames constituant une trame, au moins certaines périodes de délivrance de signal de balayage des première et deuxième électrodes de balayage ayant une similarité de données devant être affichées qui est supérieure à une valeur de référence se chevauchent mutuellement. Par conséquent, lors de la commande d'un panneau de haute définition, une marge de commande de panneau peut être garantie par réduction d'une période de balayage, et la qualité d'une image d'affichage peut être améliorée en utilisant le temps économisé par la réduction de la période de balayage.
PCT/KR2008/003962 2008-01-29 2008-07-04 Appareil d'affichage à plasma et procédé de commande WO2009096639A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018128675A (ja) * 2017-02-07 2018-08-16 株式会社半導体エネルギー研究所 表示装置の駆動方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050113878A (ko) * 2004-05-31 2005-12-05 삼성에스디아이 주식회사 플라즈마 디스플레이 패널의 구동 장치 및 그에 따른 구동방법
KR20060056821A (ko) * 2004-11-22 2006-05-25 엘지전자 주식회사 플라즈마 디스플레이 패널의 구동 장치 및 방법
KR20060067277A (ko) * 2004-12-14 2006-06-19 엘지전자 주식회사 플라즈마 디스플레이 패널의 구동방법
KR20060093859A (ko) * 2005-02-23 2006-08-28 엘지전자 주식회사 플라즈마 디스플레이 패널, 장치, 패널의 구동 장치 및 구동 방법
KR20060103231A (ko) * 2005-03-25 2006-09-28 후지츠 히다찌 플라즈마 디스플레이 리미티드 플라즈마 디스플레이 패널의 구동 방법 및 플라즈마디스플레이 장치
KR20070019490A (ko) * 2005-08-12 2007-02-15 엘지전자 주식회사 플라즈마 디스플레이 장치 및 그의 구동 방법
KR20070059943A (ko) * 2005-12-06 2007-06-12 후지츠 히다찌 플라즈마 디스플레이 리미티드 플라즈마 디스플레이 장치

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4731939B2 (ja) * 2005-02-10 2011-07-27 パナソニック株式会社 表示パネルの駆動方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050113878A (ko) * 2004-05-31 2005-12-05 삼성에스디아이 주식회사 플라즈마 디스플레이 패널의 구동 장치 및 그에 따른 구동방법
KR20060056821A (ko) * 2004-11-22 2006-05-25 엘지전자 주식회사 플라즈마 디스플레이 패널의 구동 장치 및 방법
KR20060067277A (ko) * 2004-12-14 2006-06-19 엘지전자 주식회사 플라즈마 디스플레이 패널의 구동방법
KR20060093859A (ko) * 2005-02-23 2006-08-28 엘지전자 주식회사 플라즈마 디스플레이 패널, 장치, 패널의 구동 장치 및 구동 방법
KR20060103231A (ko) * 2005-03-25 2006-09-28 후지츠 히다찌 플라즈마 디스플레이 리미티드 플라즈마 디스플레이 패널의 구동 방법 및 플라즈마디스플레이 장치
KR20070019490A (ko) * 2005-08-12 2007-02-15 엘지전자 주식회사 플라즈마 디스플레이 장치 및 그의 구동 방법
KR20070059943A (ko) * 2005-12-06 2007-06-12 후지츠 히다찌 플라즈마 디스플레이 리미티드 플라즈마 디스플레이 장치

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018128675A (ja) * 2017-02-07 2018-08-16 株式会社半導体エネルギー研究所 表示装置の駆動方法
JP7083655B2 (ja) 2017-02-07 2022-06-13 株式会社半導体エネルギー研究所 表示装置の駆動方法

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