CN100372044C - Driving electrode structure of plasma plane display - Google Patents
Driving electrode structure of plasma plane display Download PDFInfo
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- CN100372044C CN100372044C CNB200410062806XA CN200410062806A CN100372044C CN 100372044 C CN100372044 C CN 100372044C CN B200410062806X A CNB200410062806X A CN B200410062806XA CN 200410062806 A CN200410062806 A CN 200410062806A CN 100372044 C CN100372044 C CN 100372044C
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Abstract
The present invention relates to a driving electrode structure of a plasma plane display, which is used for increasing the operating range for driving a voltage. An adjusting opening is designed at the branched position of each transparent electrode which is connected with each pectinate electrode; the area of a transparent electrode in each lighting unit is adjusted along with the driving characteristics of phosphors in different lighting units to increase the operating range for driving a sustaining voltage.
Description
Technical field
The invention relates to a kind of plasma planar display (PDP), and, be used to improve the opereating specification of driving voltage particularly relevant for a kind of drive electrode structure.
Background technology
Because multimedia fast development makes the user more and more high to the acousto-optic equipment requirements of periphery.Traditionally, and cathode ray tube commonly used or title camera tube (Cathode Ray Tube, the CRT) display of type, however the volume of this class display is too huge, is bragging about now in light, thin, short, the little epoch, does not gradually apply demand.
Therefore, have many flat-panel screens technology to be developed in succession in recent years, as LCD (Liquid Crystal Display, LCD) and flat plasma display (Plasma Display Panel, PDP), become the main flow of following display gradually.Wherein, flat plasma display (PDP) is subjected to attracting attention greatly as full-color display unit, and flat plasma display (PDP) has large-sized display area, is specially adapted to large scale TV or outdoor display board.
In color PDP, produce ultraviolet ray by gas discharge, excited fluophor is launched visible light and is formed display effect.According to the discharge mode of PDP, color PDP simply can be divided into AC type (AC) and once-through type (DC) two classes.In AC type PDP, on electrode, be coated with protective layer, this makes AC type PDP have long useful life and higher display brightness.Therefore, in display effect, luminous efficiency and on useful life, AC type PDP generally is better than once-through type PDP.The normal three-electrode structure that uses in AC type PDP comprises shared electrode (Common electrode), scan electrode (Scan electrode) and address electrode (Address electrode) at present.Three-electrode structure is the surface discharge form, and switches or keep discharge by the address electrode that applies voltages to sidewall surfaces.
Wherein, common electrode and scan electrode are positioned on the substrate of image demonstration side, are generally the transparency electrode of strip, and it is made of the electrically conducting transparent material, use transmission and show light.The material typical case of transparency electrode is formed by indium tin oxide (ITO), and it is indium oxide (In
2O
3) and tin oxide (SnO
2) mixture.Compare with metal, the conductance of transparency electrode is relatively low, can form the non-transparent electrode of a narrow and good conductive degree usually on transparency electrode, is commonly referred to as auxiliary electrode (Buselectrode), to increase its electrical conductivity.
In the chromatic plasma flat-panel screens, the fluorescence coating that utilizes each luminescence unit inwall to be coated with, the ultraviolet ray that discharge is formed converts trichromatic coloured light to, such as being red (R), green (G) and blue (B).In the Discharge illuminating process therebetween; utilization writes the protective layer surface accumulation wall electric charge of pulse voltage outside transparency electrode and discharges; but because the wall electric charge of accumulation just was through with in the moment of discharge; if will make luminous constantly just must the applying of luminescence unit keep pulse voltage, use the electric charge that provides discharge required continuously.
When the indigo plant that adopts when the Discharge illuminating structure of flat plasma display, red, green three primary colors fluorophor,, make the pulse voltage of keeping of three colour light emitting unit respectively have its driving scope because the three primary colors fluorophor respectively has different drive characteristics.When driving with conventional platy transparency electrode and auxiliary electrode structure, owing to must take into account the driving scope of each colour light emitting unit, so keeping pulse only can drive by narrow and small lap between three colors, this makes the stability that drives to improve, limit luminous condition, and for stably luminous, the making of Discharge illuminating structure must be more accurate, causes processing procedure nargin limited.Therefore, how to enlarge the opereating specification of keeping pulsed drive voltage and just become the problem of being badly in need of solution.
Summary of the invention
Therefore a purpose of the present invention is providing a kind of drive electrode structure of flat plasma display, opening is adjusted in design in transparency electrode, adjust the area of transparency electrode along with the fluorophor that uses different colours, make the luminescence unit of different colours in identical keeping under the voltage, produce the cumulant of different wall electric charges, furthering makes the driven scope of each color, keeps the opereating specification of driven with raising.
For achieving the above object, the invention provides a kind of drive electrode structure of flat plasma display, be to be formed on the substrate, be used to be driven into several luminescence units that row are arranged.This structure comprises a comb electrode and a transparency electrode at least; Wherein, comb electrode has a main line and several branch lines, and main line is crossed into the luminescence unit that row are arranged, and branch line is then from the main line vertical extent and between luminescence unit.Transparency electrode system is parallel to the main line of comb electrode, and be electrically coupled to the branch line of comb electrode, have several in the transparency electrode and adjust opening, each is adjusted opening and corresponds respectively to a branch line, each extends an adjustment width to adjusting adjacent adjustment opening between the opening, make the partially transparent electrode of adjusting between the opening have an active electrode width.
Wherein, adjusting width is to adjust according to the drive characteristic of fluorophor in the luminescence unit, with red, blue and green emitting unit is example, the adjustment width of emitting red light unit is greater than the adjustment width of blue-light-emitting unit, and the adjustment width of blue-light-emitting unit is greater than the adjustment width of green emitting unit.So, the active electrode width maximum of green emitting unit, and the active electrode width minimum of emitting red light unit.Adjust structure by this, the driving scope of keeping voltage of three kinds of colors can be furthered, but make the opereating specification of keeping voltage promote the stability that helps to promote operation near identical.
Description of drawings
Fig. 1 is the cross-sectional view that illustrates display floater of the present invention.
Fig. 2 is the planar structure schematic diagram that illustrates drive electrode of the present invention.
Fig. 3 illustrates the comparison diagram of keeping voltage control scan voltage of the present invention with the conventional ADS driving electrode.
The number in the figure explanation
10 prebasal plates
12 transparency electrodes
14 comb electrodes
142 main lines, 144 branch lines
16 electric inducing layers, 18 protective layers
20 metacoxal plates, 22 address electrodes
24 barrier rib 26a, 26b, 26c fluorophor
28 electric inducing layers
200,202,204,206 adjust opening
300 luminescence units
Embodiment
The invention provides a kind of drive electrode structure of flat plasma display; opening is adjusted in design in transparency electrode; along with the drive characteristic of fluorophor in the luminescence unit is adjusted A/F; change the area of transparency electrode; adjust the wall electric charge that the protective layer surface is accumulated in the different colours luminescence unit; so can the further driving scope of three kinds of primary colours enlarges the opereating specification of keeping voltage by this.
Fig. 1 illustrates the cross-sectional view of the display floater of one embodiment of the invention.Please refer to Fig. 1, the display floater of flat plasma display of the present invention comprises a prebasal plate 10 and a metacoxal plate 20 at least, generally is glass substrate, such as being soda-lime glass (soda lime glass) substrate or high strain point glass substrate.On metacoxal plate 20, be formed with several address electrodes that is arranged in parallel (Addresselectrode) 22, generally constituted by silver (Ag) or aluminium high conductivity materials such as (Al).Be formed with an electric inducing layer 28 on metacoxal plate 20, be used for overlay address electrode 22, electric inducing layer 28 is such as being formed by low-melting glass.On electric inducing layer 28, be formed with several barrier ribs that is arranged in parallel 24, and be placed on respectively between the address electrode 22.Certainly, only illustrate, do not limit the barrier rib 24 of strip shown in Figure 1, also can use various barrier wall structure, be used for being separated out the required discharge space of luminescence unit at this.
In the inboard of prebasal plate 10, be formed with severally to conductive electrode, be positioned on each row luminescence unit, and it is perpendicular with address electrode, as common electrode and scan electrode, be X electrode shown in the figure and Y electrode respectively, to constitute the required electrode structure of each luminescence unit.Each comprises that to conductive electrode a pair of transparency electrode 12 and collocation have a pair of comb electrode 14; and be coated with electric inducing layer 16 and protective layer 18 on it in regular turn; wherein transparent protective layer 18 is formed by magnesium oxide (MgO) usually; be to be used for protecting conductive electrode; avoid conductive electrode in discharge process, to be damaged, use the useful life that prolongs conductive electrode.
Between barrier rib 24, be coated with three kinds of primary colours luminous required fluorophor 26a, 26b, 26c, utilize the luminescence unit of these three kinds of primary colours to constitute picture element.The fluorophor of the most normal use at present is made of red (R), green (G), blue (B) three colour systems, and certain the present invention also can use the fluorophor of other primary colours.With RGB three looks is example, and red-emitting phosphors is such as using yttrium gadolinium borate: europium ((Y, Gd) BO
3: Eu), green-emitting phosphor is such as using zinc silicate: manganese (Zn
2SiO
4: Mn), and blue emitting phophor is such as using barium magnesium aluminate: europium (BaMgAl
10O
17: Eu
2+) as the fluorescence material.Radiate red, green, blue three coloured light by the staggered electrodes of front- back baseboard 10,20 ultraviolet irradiation fluorophor 26a, 26b, the 26c that is produced that in luminescence unit, discharge, and three primary colors blend together required color by this.
Because traditional transparency electrode and auxiliary electrode is to be banded structure, each primary colours respectively has its driving scope when driving, and its overlapping scope is dwindled, but cause opereating specification narrow and small, so that traditional electrode structure is subjected to great restriction when operation.The invention provides a kind of improved electrode structure, but can enlarge the opereating specification of driving voltage, promote the stability of product.Fig. 2 illustrates the planar structure schematic diagram of drive electrode of the present invention, and drive electrode of the present invention is positioned at the inboard of prebasal plate, and arranges with symmetric mode.Please refer to Fig. 2, drive electrode comprises a comb electrode 14 and a transparency electrode 12.For three-electrode structure, a pair of transparency electrode 12 and a pair of comb electrode 14 are set respectively at the two opposite sides of luminescence unit.Wherein, paired comb electrode 14 is positioned at the both sides of luminescence unit, arranges with symmetric mode, with the beneath barrier rib 24 staggered luminescence units 300 that are separated out into row.Be coated with fluorophor R, G, the B of three kinds of primary colours in the adjacent luminescence unit 300 respectively, constitute each picture element unit.
Each comb electrode 14 comprises main line 142, crosses into the luminescence unit 300 that row are arranged, and main line 142 is to be connected to a signal provision circuit (not shown), controls the whether luminous of specific luminescence unit.Vertically extend several branch lines 144 from main line 142, these branch lines 144 are between luminescence unit 300, that is the barrier rib 24 under aiming at, and therefore opaque branch line 144 can not cover the selfluminous cell 300 interior light that radiate out.Main line 142 is made of opaque high conductivity material with branch line 144, comprises aluminium, cobalt, silver, molybdenum, chromium, tantalum, tungsten, iron, copper etc. and alloy thereof, and is preferably by the conductivity antireflection material and is constituted, such as be deceive silver-colored.The end of branch line 144 levels off to the discharge centers in the middle of the luminescence unit 300, helps to make the electric field that is produced in the luminescence unit 300 to become more even when discharge, obtains more uniform ray with this.
Be formed with a pair of transparency electrode 12 between every pair of comb electrode 14, this transparency electrode 12 is made of transparent conductive material, generally such as being formed by indium tin oxide (ITO) or indium-zinc oxide (IZO) etc.Transparency electrode 12 is and comb electrode 14 walks abreast is connected, and is preferably the branch line 144 of only following comb electrode 14 and connects, and does not contact with main line 142, so can use the transparency electrode 12 than small size, can reduce the parasitic capacitance that transparency electrode 12 places produce.
The present invention forms several and adjusts opening 200 in transparency electrode 12, comprise opening 202,204,206, adjusts active electrode width in indivedual luminescence units 300.As shown in Figure 2, adjust the branch line 144 that opening 200 is aimed at comb electrode 14, each is adjusted opening 200 and has an adjustment width a, b, c separately with respect to contiguous luminescence unit 300.With RBG three colour systems is example, in the emitting red light unit R, adjust opening 202 and 206 for contiguous two and have the width of adjustment c in the emitting red light unit R, therefore the active electrode width W c of transparency electrode 12 therein deducts the adjustment width c of both sides for the luminescence unit width W.Equally similarly, in green emitting unit G, contiguous adjustment opening 202 and 204 has the width of adjustment a in the side near green emitting unit G, so active electrode width W a therein is W-2a.In the blue-light-emitting unit B, active electrode width W b then is W-2b.Wherein, active electrode width W a, Wb, Wc are that drive characteristic according to fluorophor changes.With RGB three colour systems is example, and it drives degree of difficulty is green＞blueness＞redness, is c＞b＞a so adjust the design of width, so active electrode width W a＞Wb＞Wc.When Discharge illuminating, carry out in the charging and discharging process, the protective layer 18 surface accumulations of wall electric charge under transparency electrode 12, and also the cumulant of wall electric charge is directly proportional with active electrode width W a, Wb, Wc, can adjust driving voltage required when discharging and recharging by this.
Utilize adjustment opening 202,204,206 change active electrode width W a, Wb, Wc optimal representation to be to enlarge the opereating specification of driving voltage, but especially be to improve the opereating specification of keeping voltage, make and keep voltage bigger operating space is arranged, make the Discharge illuminating action of luminescence unit more stable.Fig. 3 illustrates the comparison figure of drive electrode structure of the present invention with conventional band drive electrode structure.Please refer to Fig. 3, generally be to utilize to write pulse voltage in flat plasma display, or be called scanning voltage, decide the whether luminous of certain specific luminescence unit.When applying at a certain specific luminescence unit when writing pulse voltage and carrying out Discharge illuminating, because the wall electric charge of accumulation just was exhausted in the moment of discharging, must apply and keep pulse voltage, or be called and keep voltage, to provide Discharge illuminating required electric charge continuously.Because the red, green, blue tri-color phosphor respectively has different drive characteristics, therefore apply scanning voltage back apply keep voltage, can present different drive voltage range along with the drive characteristic of different colours.As shown in Figure 3, keeping voltage to green-emitting phosphor applied must can make luminescence unit continue Discharge illuminating between maximum voltage and minimum voltage, if exceed this driving scope will be easily can't be luminous and form bad point.Similarly red-emitting phosphors also has its driving scope, but just reduce slightly with respect to green-emitting phosphor, therefore really can drive opereating specification only between the minimum voltage of the maximum voltage of redness and green, this makes that can to drive opereating specification very narrow and small, keeps the stability of voltage when operation and can't promote.Flat plasma display is under normal behaviour in service, and this can drive opereating specification and can dwindle with increasing service time, causes the lost of life of product.
The present invention is adjusted at three active electrode width W a, Wb, Wc among the colour light emitting unit R GB by adjusting opening 202,204,206.Traditional banded drive electrode structure, the active electrode width of its each luminescence unit is identical, therefore can't change its driving voltage.The present invention then can adjust active electrode width W a, Wb, Wc by the adjustment opening in the transparency electrode 12 202,204,206, makes each luminescence unit RGB form different wall electric charge cumulants.Because the active electrode width W c minimum of emitting red light unit R, can improve its driving scope by this, as shown in Figure 3, the red electric voltage displacement of keeping, maximum voltage and minimum voltage all upwards promote, to green to keep voltage approaching, the therefore red and green overlapping scope of keeping voltage has increased gap d.Similarly, the voltage of keeping of blue-light-emitting unit B also upwards promotes with green approaching, this moment red, green, blue three looks the driven scope of keeping be close to identical, so just can obtain the driven opereating specification of maximum.
When continuing light emission operation, apply and fixing keep voltage in red, green, blue look luminescence unit, the present invention utilizes and adjusts the driven scope of keeping that opening 202,204,206 is adjusted red, green, blue three looks, lap is increased, but promote the opereating specification of keeping voltage with this.Thus, not only can improve the stability of Discharge illuminating, and more can increase the useful life of flat plasma display.In addition, the processing procedure nargin of flexibility on the circuit controlling Design and making luminescence unit all can promote.
In sum, utilize drive electrode structure of the present invention, can be according to the drive characteristic of fluorophor, adjust the active electrode width on the transparency electrode, but the opereating specification of voltage is kept in lifting, can improve the stability of Discharge illuminating with this, and increase the useful life of display floater, and promote processing procedure nargin.
Claims (10)
1. the drive electrode structure of a flat plasma display, this drive electrode is formed on the substrate, and in order to be driven into several luminescence units that row are arranged, this drive electrode structure comprises at least:
One comb electrode has a main line and several branch lines, and this main line is crossed described luminescence unit, and those branch lines are from this main line vertical extent and between those luminescence units; And
One transparency electrode, the main line that is parallel to this comb electrode, and be electrically coupled to the branch line of this comb electrode, have several in this transparency electrode and adjust opening, described several adjust in openings each in alignment with in described several branch lines each, and each is adjusted opening and has adjustment width inequality, make that the active electrode width of the transparency electrode between adjacent adjustment opening can be according to the drive characteristic of the fluorophor of the luminescence unit that is positioned at identical correspondence position and adjust, wherein this fluorophor comprises red-emitting phosphors, green-emitting phosphor and blue emitting phophor, and wherein this of this red-emitting phosphors adjusted width this adjustment width greater than this blue emitting phophor, and this of this blue emitting phophor adjusted width this adjustment width greater than this green-emitting phosphor.
2. drive electrode structure as claimed in claim 1 is characterized in that described comb electrode is made of the electrically conductive anti-reflective material.
3. drive electrode structure as claimed in claim 1 is characterized in that, the material of described comb electrode is aluminium, cobalt, silver, molybdenum, chromium, tantalum, tungsten, iron, copper or its combination.
4. drive electrode structure as claimed in claim 1 is characterized in that, the driving scope of keeping voltage of luminescence unit with redness, blue and green-emitting phosphor is roughly the same.
5. the drive electrode structure of a flat plasma display, this drive electrode is formed on the substrate, planning has into several picture elements that row are arranged on this substrate, each picture element has first, second and the 3rd luminescence unit at least, and this drive electrode structure is in order to drive those luminescence units, and this drive electrode structure comprises at least:
One comb electrode has a main line and several branch lines, and this main line is crossed those luminescence units, and those branch lines are from this main line vertical extent and between those luminescence units; And
One transparency electrode, this main line that is parallel to this comb electrode, and be electrically coupled to those branch lines of this comb electrode, have several in this transparency electrode and adjust opening, each adjusts the opening alignment in this branch line, and each is adjusted opening and extends first, second, third adjustment width respectively to this first, second, third luminescence unit, wherein this first, second and the 3rd luminescence unit have redness, blueness and green-emitting phosphor respectively, and this first adjustment width is greater than this second adjustment width, and this second adjustment width is adjusted width greater than the 3rd.
6. drive electrode structure as claimed in claim 5 is characterized in that described comb electrode is made of the electrically conductive anti-reflective material.
7. drive electrode structure as claimed in claim 5 is characterized in that, the material of described comb electrode is aluminium, cobalt, silver, molybdenum, chromium, tantalum, tungsten, iron, copper or its combination.
8. the drive electrode structure of a flat plasma display, this drive electrode is formed on the substrate, planning has into several picture elements that row are arranged on this substrate, each picture element has redness, blue and green emitting unit at least, and this drive electrode structure is in order to drive those luminescence units, and this structure comprises at least:
A pair of comb electrode, be tied to form symmetric arrays, each comb electrode has a main line and a plurality of branch line, and this is positioned at the both sides of those luminescence units to main line, cross those luminescence units, and this each branch line extends and between those luminescence units to intermediate vertical to main line from this; And
A pair of transparency electrode, between this is to main line and be parallel to this to main line, this is electrically coupled to this those branch lines to comb electrode respectively to transparency electrode, this adjusts opening to having several in the transparency electrode, each adjusts the opening alignment in this branch line, and each is adjusted opening and extends first, second, third adjustment width respectively to this redness, blueness, green emitting unit, wherein this first adjustment width is greater than this second adjustment width, and this second adjustment width is adjusted width greater than the 3rd.
9. drive electrode structure as claimed in claim 8 is characterized in that described comb electrode is made of the electrically conductive anti-reflective material.
10. drive electrode structure as claimed in claim 8 is characterized in that, the material of described comb electrode is aluminium, cobalt, silver, molybdenum, chromium, tantalum, tungsten, iron, copper or its combination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410062806XA CN100372044C (en) | 2004-06-16 | 2004-06-16 | Driving electrode structure of plasma plane display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410062806XA CN100372044C (en) | 2004-06-16 | 2004-06-16 | Driving electrode structure of plasma plane display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1710695A CN1710695A (en) | 2005-12-21 |
| CN100372044C true CN100372044C (en) | 2008-02-27 |
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|---|---|---|---|
| CNB200410062806XA Expired - Fee Related CN100372044C (en) | 2004-06-16 | 2004-06-16 | Driving electrode structure of plasma plane display |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5900694A (en) * | 1996-01-12 | 1999-05-04 | Hitachi, Ltd. | Gas discharge display panel and manufacturing method thereof |
| US6348762B1 (en) * | 1998-10-16 | 2002-02-19 | Nec Corporation | Surface discharge type color plasma display panel |
| US6452333B1 (en) * | 1999-02-19 | 2002-09-17 | Pioneer Corporation | Plasma display panel |
| US6680573B1 (en) * | 1999-07-26 | 2004-01-20 | Lg Electronics Inc. | Plasma display panel with improved illuminance |
-
2004
- 2004-06-16 CN CNB200410062806XA patent/CN100372044C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5900694A (en) * | 1996-01-12 | 1999-05-04 | Hitachi, Ltd. | Gas discharge display panel and manufacturing method thereof |
| US6348762B1 (en) * | 1998-10-16 | 2002-02-19 | Nec Corporation | Surface discharge type color plasma display panel |
| US6452333B1 (en) * | 1999-02-19 | 2002-09-17 | Pioneer Corporation | Plasma display panel |
| US6680573B1 (en) * | 1999-07-26 | 2004-01-20 | Lg Electronics Inc. | Plasma display panel with improved illuminance |
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| Publication number | Publication date |
|---|---|
| CN1710695A (en) | 2005-12-21 |
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