CN1120459C

CN1120459C - Plasma display with high luminous effeciency

Info

Publication number: CN1120459C
Application number: CN99118194A
Authority: CN
Inventors: 蔡增喜
Original assignee: DAQI SCIENCE AND TECHNOLOGY Co Ltd
Current assignee: DAQI SCIENCE AND TECHNOLOGY Co Ltd
Priority date: 1999-08-30
Filing date: 1999-08-30
Publication date: 2003-09-03
Anticipated expiration: 2019-08-30
Also published as: CN1286460A

Abstract

The present invention relates to a plasma display with high luminous efficiency, which comprises a plane display panel, wherein the plane display panel is formed by sealing a first and a second glass substrates, and a plurality of discharge units are positioned between the first and the second glass substrates; every discharge unit is defined by closed space which is separated by two longitudinal and two transverse partition boards, and every discharge unit comprises an addressing electrode, a first and a second discharge sustaining electrodes, a dielectric layer, a protecting layer, discharge gas and fluophor. Except the longitudinal partition boards, the transverse partition boards are additionally arranged in every discharg unit so as to increase the spreading power of the fluophor in the unit, enlarge discharg range formed between the first and the second discharg sustaining electrodes, reduce dark room and improve luminous efficiency. Every two adjacent discharge units can share the second discharge sustaining electrode so as to reduce electrodes and reduce fabricating cost.

Description

Plasma scope with high-luminous-efficiency

Technical field

The present invention relates to a kind of plasma scope.Especially, the present invention relates in the discharge cell of a plasma display to utilize add lateral partitions, increasing the spreading area of the fluorophor in the discharge cell, and enlarge two discharges and keep formed discharge range between the electrode, reduce the dark space, improve luminescence efficiency.

Background technology

The plane of the panel of display turns to the research tendency of display panel in recent years.The display that has at present two-d display panel in the development comprises: and plasma scope (plasma display panel, PDP), LCD (LCD), and electroluminescence (EL) display.The common trait of these displays is the data signals of representative video data, be supplied to several vertical addressing lines (perhaps data bus) from one drive circuit, and several horizontal scanning lines one after the other are excited, and show that this video data is at the discharge cell that is addressed to the joining between this addressing line and this sweep trace.

In numerous flat-panel screens, PDP is a new product that receives a lot of attention in recent years.PDP is a kind of flat-panel screens that maximizes, can be as the purposes such as monitor of home-use wall hung television and computer.

Distinguish according to discharge mode, PDP can be divided into direct current (DC) discharge again and exchange two kinds of kenels of (AC) discharge, and both are different on panel construction and type of drive.The difference of the panel construction maximum of AC-PDP and DC-PDP is to have or not dielectric layer in the sparking electrode outside.DC-PDP does not have this dielectric layer, and because of lacking the protection of dielectric layer, electrode is directly exposed under the sputter of plasma, and the easy melanism of fluorophor causes the life-span shorter.And DC-PDP is excessive in order to prevent discharge current in design, must design a resistance to suppress electric current in each discharge cell.The resistance uniformity coefficient of resistance in these unit (in-cellresistor) is difficult for grasping and control on making.In addition, because the remaining memory effect of following of wall electric charge (wallcharge), the next door of each discharge cell also must subsidiary space that can supply igniting (priming) usefulness of design.

Therefore, generally speaking the panel of DC-PDP make than AC-PDP come complicatedly, difficult, also cause AC-PDP on commercial application development, to be paid attention to.

Yet AC-PDP still has many problems still to be overcome at present, and main problem has following 2 points: 1. the lifting of luminescence efficiency:

Be promoted to more than the 21m/w by present 11m/w (lumens/watt), make brightness (brightness) reach 500nit (cd./m ²) (1 nit=1 candle/rice ²) more than.And will consume electric power is controlled in 300 watts.This can set about from many directions.As seeking better discharge cell structure, improve the electron emission coefficiency of electrode surface (MgO), seek better discharge gas and form, improve the quantum efficiency of fluorophor, use the long ultraviolet ray of wavelength instead and work as excitation source, improve visible light and reach in the penetrance of header board at the reflectivity of back plate etc.When the discharge cell size was dwindled, the demand of brightness improving can be more urgent.The efficient that changes type of drive or raising drive circuit system in addition also can promote whole luminescence efficiency.

After brightness improved, the improvement of contrast (contrast) degree just became easy relatively.Present Driving technique can be forced down background value (producing during igniting) below the 1nit, therefore as long as the environment reflection of light is lowered again.And the affiliation that adds of anti-reflecting layer hinders appearing of panel internal light, because of increasing the luminosity of display.2. reduce cost:

At present the PDP price is also quite high, 42 inches every price at 1,000,000 Yen (about 140,000 Renminbi) up and down, 50 inches PDP price is more up to more than 2,000,000 Yen, this is not the receptible price of general family.The price fixing of following PDP is a target with 10,000 Yen of per inchs.This can be set about by several respects, with regard to improving with regard to the aspect of operation, must simplify working process, and promotes display yield rate (yieldratio).The formation of the evaporation of MgO film, dividing plate (rib) and the operations such as coating of fluorophor must be done further to improve.The cost of making the material (as glass substrate etc.) of display must reduce.Secondly with regard to driving circuit, must reduce the operating voltage of display, so can reduce the cost of drive IC (integrated circuit).Also can change the type of drive of display in addition, to reduce the number of required IC.

Because existing AC-PDP has the shortcoming of low luminescence efficiency and high manufacturing cost, and causes motivation of the present invention.Below by description to prior art, disclose the direction of the present invention to the PDP architecture advances. The analysis of prior art

The reference data of following prior art, relevant with plasma scope.

1. U.S. Patent number 4,638, and 218

2. U.S. Patent number 4,737, and 687

3. U.S. Patent number 5,420, and 602

4. U.S. Patent number 5,436, and 634

5. U.S. Patent number 5,446, and 344

6. U.S. Patent number 5,541, and 618

The first ancestor of PDP can trace back to nineteen twenty-seven by 50 * 50 pixels (pixel) display that U.S. Bell System is developed, and is to utilize elongated discharge tube to be used as discharge cell at that time.By 1964, the display pannel with modern AC-PDP blank just came out by doctor Slowttow of Yi Linuo university is designed.It is to utilize nitrogen as discharge gas.

The principle of PDP is to utilize gas under certain pressure, the free ejected electron of the electric field that can be added easily becomes conductor, the transition of outer-shell electron energy level can take place because of the bump that is subjected to charged particle in gas atom or molecule in the process of discharge, therefore the photon of various wavelength is emitted in the meeting radiation, comprise ultraviolet ray, through the conversion of fluorophor, become desired visible light, the principle of luminosity of Here it is color PDP.Can continuous discharge under lower voltage after the gas ionization discharge (firing), this is so-called glow discharge (glow discharging) zone, also is the stable work area of PDP.If voltage is too high arc discharge (arcing) can take place then, make electrode burn.Distance dependent between the easiest discharge air pressure and sparking electrode.So-called Paschen curved line relation is arranged between air pressure and the spread of electrodes.

Wavelength that PDP is luminous and intensity are decided by the kind and the air pressure of gas, and the intensity of extra electric field.Not having chemically reactive inert gas is the most normal discharge gas of making PDP that is used.

PDP is extensive use of the Ne-Xe combination gas at present, and air pressure is between 200～700torr (1 torr=1mmHg ≌ 133Pa).Xe content generally is no more than 10%, air pressure high brightness height, but need higher sparking voltage.The discharge of Xe gas can produce 147nm, 153nm and 172nm equiwavelength's ultraviolet light.These all are the excitaton sources as the Red Green Blue fluorophor.When Xe content was the highest, the intensity of long wave ultraviolet light can increase.The purpose that adds Ne is the usefulness as auxiliary discharge, because of the metastable energy level of its tool helps dissociating of Xe.Also can add section H e in addition and be sent the orange light intensity, and improve the excitation of panel to reduce Ne.And general daylight lamp Ne-Ar (0.5%) combination gas commonly used also have recently studies show that can be applied to PDP, reducing the sparking voltage of PDP, and improve luminescence efficiency.

The AC-PDP of surface-discharge (surface discharge) type is arranged on the same substrate because of its two electrodes of keeping discharge, and fluorophor is coated on another substrate, and phosphor body more can not be subjected to the bombardment of charged particle.Therefore spoke promotes serviceable life greatly.

Fig. 1 illustrates the structure of a traditional three-electrode surface discharge type AC-PDP.Between two sheet glass substrates, accompany millions of discharge cells.Include necessary electrode, dielectric layer, discharge gas and phosphor body in each discharge cell.Constitute a pixel by three horizontal adjacent and discharge cells that be coated with the phosphor body that can convert red, green, blue coloured light to respectively.Different discharge cells are to separate by dividing plate.General design at present is only dividing plate to be made longitudinal strip, and does not make horizontal dividing plate.Done a benefit like this, that is exactly when the back segment operation makes up forward and backward substrate, can allow bigger bit errors.But its shortcoming is because make two vertically adjacent discharge cells unimpeded each other, can cause the problem of optical crosstalk (cross talk), and this can cause the reduction of the cross-color (distortion) that shows and contrast (contrast).

The prebasal plate part has two strip electrodes in each discharge cell, it is a main electrode of keeping Discharge illuminating, divides into Y-electrode (scan electrode) and X-electrode (common electrode) again.Each bar discharge is kept electrode and is made up of a wide sparking electrode and a thin bus electrode (bus electrode).Sparking electrode generally uses electrically conducting transparent plastic cement material ITO, uses it to strengthen machining area, and can adjust the discharge spacing.Bus electrode is normally with resistance lower silver or copper.With the words of silver directly wire mark go out the electrode style, or carry out with the method for exposure imaging, the latter can obtain meticulousr lines.The advantage of silver electrode is that resistance is lower.Words with copper then often plate CrCuCr earlier with sputtering method, make electrode with the gold-tinted method again.Be transparent dielectric layer on the electrode, necessary capacitance can be provided.The upper strata is the MgO layer again, it because of have lower power function can be under lower voltage electron radiation, it protects bottom to avoid ion to be subjected to the function of sputter in addition in addition.

(capsulated color filter CCF), and the black streaking used of the antireflection of strip, its objective is and can improve contrast and increase excitation also to include the capsule shape colored filter that filters effect of light on the header board of NEC product.CCF has only NEC using at present.Though this design can significantly promote high-contrast and excitation, yet can sacrifice about 30% brightness simultaneously.

Addressing-electrode on the metacoxal plate is available copper or silvery work also.It also can increase the dielectric layer that one deck white reflection is used.Be dividing plate then.Dividing plate is except that separating discharge cell, also as the support of two substrates up and down.Keeping electrode because of the discharge of surface discharge type AC-PDP is to be positioned at prebasal plate, and it is to the requirement of the high homogeneity of dividing plate, not if the requirement of DC-PDP or subtend type AC-PDP comes highly.This also is one of advantage of surface discharge type.

The method for making of dividing plate dispute at present is still many, is the mode (contraposition is wanted accurate and must be repeated to print ten for several times) with direct wire mark style traditionally.A kind of method is to make the last layer base material with the mode of whole printing or coating earlier, removes part not with sand-blast again.This is comparatively ripe at present method.Sand-blast all can be competent at for the display of large tracts of land and high-fineness, but this method manufacture craft is comparatively complicated, and material cost is also higher.Other also has so-called completion method (lift off) and pressed film method (stamping).The former carries out the part beyond the dividing plate earlier with the packing material of photoresistance dry film and so on earlier, and the dividing plate material is poured in the mould, will fill material after the drying again and remove.And the latter still locates the development phase, as yet practicability not.

Then the coating of phosphor body after dividing plate is finished.What this procedure required is the control of phosphor body shape and thickness, how to carry out with the wire mark method at present.Aspect the phosphor body material, red usefulness be Y ₂O ₃: E ³⁺Or (Y, Gd) BO ₃: E ³⁺, green usefulness be BaAl ₁₂O ₁₉: Mn or ZnSiO ₄: Mn is BaZlMg with blue light ₁₄O ₂₃: E ³⁺Wherein the reaction with blueness is the fastest, but it is in thermal technology's preface or use that its deterioration is also the most serious therebetween.The green fluorescent body has residual light to hold time to grow the problem of (response delay), and the employee mostly is about 14ms (10% residual light) at present.This may have the situation of green tail in tow when showing the high speed animation.Reacting faster, fluorescent embodies still in the development and testing stage.

Aspect glass substrate,, then look the design of processing apparatus, process conditions and display and different for the requirement of its material.Generally speaking, can use common glass pane material (sodalime).But when on thermal technology's preface if can't reduce treatment temperature or on display design, during exigent aligning accuracy, then must use still high high askew point (strain point) glass substrate of present stage cost, as the PD-200 of Asahi.This glass that aims at the PDP exploitation recently, its deflection is in 10ppm.This external firing furnace aspect also must adopt the special type of cooling, shrinks the uneven distorted deformation phenomenon (trapezoidal as square deformation) that produces to avoid substrate because of cooling.

Forward and backward glass substrate should be done annealing or stabilization thermal treatment earlier, so that stress eliminates, and impels its size stable, to reduce the drawdown deformation that thermal technology's preface is then produced.

After the front-back baseboard operation is finished, then carry out the contraposition and the involution operation of back segment.Involution is to utilize low-melting glass glue that two substrates is bonding.The contraposition of general AC kenel requires not strict, but when adopting double scanning (dual scan), or during the CCF structure of picture NEC, contraposition just must be precisely.In addition, the drawdown deformation of glass substrate or prying can cause being difficult for of contraposition.Carry out vacuum exhaust behind the substrate involution, purpose is that the air scavenge of display interior is clean, then the filling discharge gas.Display exhaust with fine discharge cell structure is thorough, need spend considerable time, a bottleneck when this can be batch process.The back segment operation does not have consistent view at present on batch manufacturing method, still have many being envisaged among the test.

Three-electrode surface discharge AC-PDP uses maximum type of drive at present, is the method for separating with a kind of addressing and display time interval, is referred to as ADS (address display-period separation).Before the several years, took the lead in adopting by Fujitsu.The configuration of its electrode can be with reference to shown in Figure 2, and Fig. 2 is the top view with the same structure of Fig. 1.

As shown in Figure 2, a discharge range (a) and an absence of discharge scope (b) are all arranged in each discharge cell.Discharge range is (as X ₁-electrode and Y ₁The spacing of-electrode) be clear zone (bright field) scope, but not discharge range is (as X ₁-electrode and the adjacent interior Y of discharge cell ₂The spacing of electrode) is dark space (darkfield) scope.Generally speaking, interfering with each other for electric field, the plasma of avoiding vertically adjacent discharge cell, cause the addressing bungle, so, all adopt design less than the absence of discharge scope for the design of discharge range.Therefore, can cause the reduction of resolution and brightness.Discharge range is too small also to have limited the live width that electrode (X-electrode and Y-electrode) kept in two discharges, and this can cause and have lower making yield rate (yield rate) when making electrode.

Fig. 3 illustrate the one side discharge AC-PDP three kinds of electrodes the input waveform and sequential relationship.During addressing, be divided into four-stage again.Be comprehensive pulse (pulse) of extinguishing simultaneously first with the phase III, in the pulse of subordinate phase for light simultaneously comprehensively.Second, third stage seems repetition, and its purpose is so arranged, and this action can allow the wall electric charge (wall charge) of each discharge cell reach unanimity, so that the write signal of quadravalence section can be lighted selected discharge cell accurately afterwards.Discharge during keeping length or umber of pulse then with set son (subfield) number that a television image (field) comprised and be directly proportional.

Fig. 4 represents the sub-field structure that a television image is comprised.Its per second comprises 60 pictures.Bit (bits) number of resolving a son can be 6,8,10 or 12 to compare top grade.Resolve bit number the more, displayable color relation the more.Parsing bit number commonly used is 8 bits, and every kind of color then has 256 color ranges (shades of gray), and is capable of being combined into about 17,000,000 looks altogether by Red Green Blue.

Though the resolution with 8 bits can have 256 color ranges, for the discharge cell that longitudinal baffle is only arranged, because of its structure vertically can produce the optical crosstalk problem, so the shortcoming that can cause color range control to reduce.For example, have only the discharge cell of longitudinal baffle to be assumed to be in the optical crosstalk rate under 1% the situation, its color range control meeting is reduced to 2-3/256 from original 1/256.

During writing, the action that the Y-electrode that discharge is kept must be done to scan one by one, this has accounted for each sub considerable time.Therefore be necessary that suitableization by discharge cell structure and material promotes the reaction velocity of discharge, to shorten sweep time.In order to keep 60 pictures of per second, when scan electrode outnumbers about 500, must put two scan electrodes at one time and open (switch on), and in order to distinguish it, addressing-electrode can be cut into two sections, promptly so-called double scanning method.But the addressing IC that must double thus also increases cost.Driving circuit accounts for the over half of PDP module cost at present.

Aspect the structure of PDP module and system, requirement is slimming, but still must take into account problems such as heat radiation and noise.PDP is not high because of luminescence efficiency, and the most of consume of hundreds of watts electric power becomes heat, so heat dissipation design is even more important than other display.Electromagnetic interference (EMI) and infrared ray (IR) prevents it also is emphasis, the malfunction when IR may cause remote control in addition.

Take a broad view of above-mentioned known PDP structure,, and on the structural design of discharge cell, only establish longitudinal baffle, but cause the promptly low luminous intensity of optical crosstalk, low-res, etc. problem for fear of the contraposition difficulty.Under old PDP structure, the configuration of electrode is restricted, so have the little shortcoming of discharge range.

Summary of the invention

Therefore, one of fundamental purpose of the present invention is to provide a plasma scope with high-luminous-efficiency.And with regard to plasma design and make and improve, further promoting luminescence efficiency, and improve and make yield rate, reduce cost of manufacture.

Traditional plasma scope because of the structure of its discharge cell, has the shortcoming that two vertically adjacent discharging structures are understood mutual optical crosstalk.And the discharge range that its two discharge is kept between the electrode and contained is too small, causes the dark space excessive.Summing up the shortcoming on the traditional plasma display device structure, is the main cause that causes its whole luminescence efficiency too low.Purpose of the present invention promptly is to provide one to have structure improved plasma scope, and its luminescence efficiency is had greatly improved.

The invention provides a kind of plasma scope with higher photoluminescence efficiency, comprising: (a) one first glass substrate defines a longitudinal direction and a horizontal direction thereon; (b) one second glass substrate is with this first glass substrate involution; (c) a plurality of discharge cells, be formed between this first glass substrate and second glass substrate, each discharge cell is defined by two longitudinal baffles and two enclosure spaces that lateral partitions was divided into, include in each discharge cell that an addressing electrode, one first discharge are kept electrode, electrode, a dielectric layer, a protective seam, a discharge gas and a phosphor body are kept in one second discharge, first discharge in each discharge cell is kept electrode and second and is discharged and keep more than 1/2nd of longitudinal pitch that formed discharge range between the electrode is extended to discharge cell;

Wherein in the discharge cell of vertical sequence, electrode is kept in 2N-1 discharge cell and 2N shared one second discharge of discharge cell, and N is a natural number.

The present invention also provides a kind of plasma scope with big light-emitting area, and comprising: (a) one first glass substrate defines a longitudinal direction and a horizontal direction thereon; (b) one second glass substrate is with this first glass substrate involution; (c) a plurality of discharge cells, be formed between this first glass substrate and second glass substrate, each discharge cell is defined by two longitudinal baffles and two enclosure spaces that lateral partitions was divided into, and includes in each discharge cell that an addressing electrode, one first discharge are kept electrode, electrode, a dielectric layer, a protective seam, a discharge gas and a phosphor body are kept in one second discharge; Wherein the discharge of first in each discharge cell is kept electrode and second and is discharged and keep more than 1/2nd of longitudinal pitch that formed discharge range between the electrode is extended to discharge cell.

The invention provides a kind of making one and have the method for the plasma scope of higher photoluminescence efficiency, this method may further comprise the steps: (a) establish one first glass substrate, define a longitudinal direction and a horizontal direction thereon; (b) establish one second glass substrate; (c) between this first glass substrate and second glass substrate, form a plurality of discharge cells, each discharge cell is defined by two longitudinal baffles and two enclosure spaces that lateral partitions was divided into, and includes in each discharge cell that an addressing electrode, one first discharge are kept electrode, electrode, a dielectric layer, a protective seam, a discharge gas and a phosphor body are kept in one second discharge; (d) with this first glass substrate and this second glass substrate involution; Wherein, electrode is kept in first discharge in each discharge cell and formed discharge range between the electrode is kept in second discharge, adds roughly more than 1/2nd of longitudinal pitch of discharge cell.

According to the present invention, in discharge cell, add lateral partitions, phosphor body can increase the spreading area of lateral partitions wall, with the lifting luminous intensity, and can avoid two vertical adjacent discharge cell optical crosstalks each other, promotes the control of color range.Because of the adding of lateral partitions, two discharges are kept the electric discharge between electrodes scope and also can be enlarged, and then reduce the dark space, can further promote whole luminescence efficiency.

The present invention adds lateral partitions in discharge cell after, two adjacent discharge cells can a shared common electrode, to reduce electrode number.Electrode is kept in discharge also can bigger live width design, makes yield rate to promote it, and then reduces cost of manufacture.

The present invention is in the discharge cell of vertical sequence, and the color sequences of its phosphor body can be adopted red, green, blue three look interleaved order modes.So the phosphor body of neighboring discharge cells is not same colour system, and contrast to each other can promote, and whole image quality also makes moderate progress.

Description of drawings

Fig. 1 illustrates the structure of the plasma scope of a traditional three-electrode surface discharge type;

Fig. 2 is the top view with the same structure of Fig. 1;

Fig. 3 illustrates the discharge driving voltage waveform and therebetween the sequential relationship of three kinds of electrodes of AC-PDP of one side;

Fig. 4 represents the grey stage structure that a television image is comprised;

Fig. 5 illustrates the top view according to the plasma scope of the first embodiment of the present invention;

Fig. 6 is the longitdinal cross-section diagram of the plasma scope of first embodiment;

Fig. 7 is the metacoxal plate framework partly of the plasma scope of first embodiment;

Fig. 8 is the prebasal plate structure partly of the plasma scope of first embodiment;

Fig. 9 illustrates the arrangement mode according to the phosphor body of the neighboring discharge cells of second specific embodiment of the present invention.

Embodiment

Below in conjunction with Fig. 5 to Fig. 8 to a preferred embodiment of the present invention will be described in detail.

Fig. 5 illustrates the plasma scope of first embodiment, comprises a display panel and one drive circuit (not shown).The following description is the structure of the display panel of this plasma display of description.As shown in Figure 5 and Figure 6, accompany a plurality of discharge cells between a front glass substrate and the back glass substrate.Wherein Fig. 5 illustrates the top view according to the plasma scope of the first embodiment of the present invention, and Fig. 6 is the longitdinal cross-section diagram of the plasma scope of first embodiment.Each discharge cell is defined by two longitudinal baffles and two enclosure spaces that lateral partitions was divided into.Include all in each discharge cell that an addressing electrode, one first discharge are kept electrode (Y-electrode), electrode (X-electrode), a dielectric layer (not shown), a protective seam, a discharge gas (not shown) and a phosphor body are kept in one second discharge.Each discharge is kept electrode and all is made up of a wide sparking electrode and a thin bus electrode.This sparking electrode is formed by an electrically conducting transparent material, in order to strengthen machining area.Bus electrode is formed by silver or copper.

Fig. 7 illustrates this forward and backward glass substrate before involution, and dividing plate, addressing-electrode and phosphor body are formed on earlier on the glass substrate of back.At first this addressing-electrode is formed on this back glass substrate with extending longitudinally, and then the border along predetermined discharge cell forms vertical lateral partitions that reaches on this back glass substrate.On the sealing area that this phosphor body is coated on vertically and lateral partitions is divided into and on the baffle wall.

Fig. 8 illustrates this forward and backward glass substrate before involution, and electrode is kept in first discharge and second discharge is kept electrode and is formed on the front glass substrate earlier.This first and second discharge keep electrode parallel to each other and along horizontal expansion be formed on this front glass substrate.Then this dielectric layer is covered in to discharge and keeps on the electrode, and this protective seam is covered on this dielectric layer again.This discharge gas is filled between this protective seam and this phosphor body.Two discharges of the present invention are kept electrode and are arranged on the same substrate (front glass substrate), and phosphor body is coated on another substrate (back glass substrate), and so phosphor body more can not be subjected to the bombardment of charged particle.Therefore can significantly promote serviceable life.

In the discharge cell of horizontal sequence, and discharge cell that respectively be coated with the phosphor body that can convert red, green, blue coloured light adjacent by three constitutes a pixel.And in the discharge cell of same vertical sequence, the phosphor body of the same color of coating conversion.The adding of lateral partitions can be avoided vertical adjacent discharge cell problem of optical crosstalk each other really, so can guarantee the control of color range and improve contrast.For example, for the resolution of 8 bits, the control of the color range of plasma scope of the present invention can be controlled at 1/256 really.Compare with the color range control (2-3/256) that traditional discharge cell structure is had, image quality has greatly improved.The lateral partitions that is increased also can reduce reflection, reduces background value, further promotes contrast of display.

In the discharge cell of vertical sequence, electrode is kept in 2N-1 discharge cell and 2N shared one second discharge of discharge cell, and N is a natural number.All second discharges are kept electrode and are connected with parallel way.This kind design is kept the number of electrode except that reducing by second discharge, and electrode is kept in second discharge also can have bigger live width design, can improve it and make yield rate, reduces cost of manufacture.

As shown in Figure 5, adding because of lateral partitions, electrode is kept in first discharge in each discharge cell and formed discharge range between the electrode is kept in second discharge, can be extended to more than 1/2nd of longitudinal pitch of discharge cell, even can contain the longitudinal pitch of whole discharge cell, and then eliminate the dark space fully, improve luminous intensity.Electrode is kept in the expansion of discharge range, first and second discharge also can bigger live width design, so can improve its yield rate on making.

The structure of traditional discharge cell, because of the design of no lateral partitions, for guaranteeing the degree of accuracy of addressing, the spacing that electrode is kept in two discharges must be contracted to the electric field of two vertical neighboring discharge cells, the distance that plasma does not interfere with each other each other.Fig. 6 shows that in the present invention because of adding the obstruct of lateral partitions, under the electric field, the plasma that do not have vertically adjacent discharge cell misgivings interfering with each other, its discharge range is still possessed the degree of accuracy of addressing after expansion.

The present invention adds lateral partitions in discharge cell after, except machining area can strengthen, more than the spreading area of the phosphor body in each discharge cell the wall area of lateral partitions, the increase of the spreading area of phosphor body also can promote luminous intensity.

Conclude the present invention for the structure of discharge cell and the improvement of electrode configuration, can increase the phosphor body spreading area, avoid optical crosstalk, strengthen machining area, eliminate the dark space.Except that the luminescence efficiency of integral body can significantly promote, all have significantly for color range control, contrast and image quality and to improve.

To be example below, first embodiment will be described further, to highlight feature of the present invention with 42 inches display panel.

General 42 inches plasma display in design, a pixel vertically and horizontal spacing all be about 1080 μ m, spacer width is about 60-80 μ m.Be made up of three horizontal adjacent discharge cells (scribbling the discharge cell of Red Green Blue respectively) because of a pixel, so the horizontal spacing of a discharge cell is about 360 μ m, and its longitudinal pitch is about 1080 μ m.

According to traditional discharge cell structure (no lateral partitions), its discharge range (clear zone scope just) is mostly less than 540 μ m, so it still has the dark space scope greater than 540 μ m.And according to the present invention, after the adding lateral partitions, discharge range can be extended to the size greater than 540 μ m, even contain the whole longitudinal pitch (1080 μ m) of discharge cell, and the dark space is eliminated fully in discharge cell.In the structure of traditional discharge cell, the live width that electrode is kept in its discharge is about 75-100 μ m.And in the present invention, the design margin that electrode can have big live width is kept in discharge, and its live width design scope on 42 inches display panel can be 100-150 μ m.

For further promoting the image quality that shows, in the second embodiment of the present invention, promptly the phosphor body arrangement mode to adjacent discharge cell improves.

As shown in Figure 9, vertically in the discharge cell of sequence, the color sequences of its phosphor body is according to the mode of traditional same color of employing, and changes the red, green, blue three look interleaved order modes that adopt into.So the phosphor body of neighboring discharge cells is not same colour system, and contrast to each other can improve, and whole resolution also has improvement.

Claims

1. plasma scope with higher photoluminescence efficiency comprises:

(a) one first glass substrate defines a longitudinal direction and a horizontal direction thereon;

(b) one second glass substrate is with this first glass substrate involution;

(c) a plurality of discharge cells, be formed between this first glass substrate and second glass substrate, each discharge cell is defined by two longitudinal baffles and two enclosure spaces that lateral partitions was divided into, and includes in each discharge cell that an addressing electrode, one first discharge are kept electrode, electrode, a dielectric layer, a protective seam, a discharge gas and a phosphor body are kept in one second discharge;

In each discharge cell first discharge is kept electrode and second and is discharged and keep more than 1/2nd of longitudinal pitch that formed discharge range between the electrode is extended to discharge cell;

2. plasma scope as claimed in claim 1; wherein this first and second discharge keep electrode parallel to each other and along horizontal expansion be formed on this first glass substrate; this dielectric layer is covered in this discharge and keeps on the electrode; this protective seam is covered on this dielectric layer; this addressing-electrode is formed on this second glass substrate with extending longitudinally; forming vertical lateral partitions that reaches on this addressing-electrode on this second glass substrate; on the sealing area that this phosphor body is coated on vertically and lateral partitions is divided into and on the baffle wall, this discharge gas is filled between this protective seam and this phosphor body.

3. plasma scope as claimed in claim 1, wherein the color sequences of the phosphor body in the discharge cell of vertical sequence adopts red, green, blue three look interleaved order modes.

4. plasma scope as claimed in claim 1, wherein this dividing plate forms with a sandblast operation.

5. plasma scope as claimed in claim 1, wherein this dividing plate is formed with a filling work procedure.

6. plasma scope as claimed in claim 1, wherein this first and second discharge is kept electrode and is had the design of bigger live width.

7. plasma scope as claimed in claim 1, wherein this first and second discharge is kept electrode and is made up of a sparking electrode and a bus electrode.

8. plasma scope as claimed in claim 7, wherein this sparking electrode is by electrically conducting transparent material ITO or SnO ₂Form.

9. plasma scope as claimed in claim 7, wherein this bus electrode is formed by silver or copper.

10. one kind has the plasma scope of light-emitting area greatly, comprising:

(b) one second glass substrate is with this first glass substrate involution;

Wherein the discharge of first in each discharge cell is kept electrode and second and is discharged and keep more than 1/2nd of longitudinal pitch that formed discharge range between the electrode is extended to discharge cell.

11. plasma scope as claimed in claim 10; wherein this first and second discharge keep electrode parallel to each other and along horizontal expansion be formed on this first glass substrate; this dielectric layer is covered in this discharge and keeps on the electrode; this protective seam is covered on this dielectric layer; this addressing-electrode is formed on this second glass substrate with extending longitudinally; forming vertical lateral partitions that reaches on this addressing-electrode on this second glass substrate; on the sealing area that this phosphor body is coated on vertically and lateral partitions is divided into and on the baffle wall, this discharge gas is filled between this protective seam and this phosphor body.

12. plasma scope as claimed in claim 10, wherein in the discharge cell of vertical sequence, electrode is kept in 2N-1 discharge cell and 2N shared one second discharge of discharge cell, and N is a natural number.

13. plasma scope as claimed in claim 10, wherein the color sequences of the phosphor body in the discharge cell of vertical sequence adopts red, green, blue three look interleaved order modes.

14. plasma scope as claimed in claim 10, wherein this dividing plate forms with a sandblast operation.

15. plasma scope as claimed in claim 10, wherein this dividing plate forms with a filling work procedure.

16. plasma scope as claimed in claim 10, wherein this first and second discharge is kept electrode and is had the design of bigger live width.

17. plasma scope as claimed in claim 10, wherein this first and second discharge is kept electrode and is made up of a sparking electrode and a bus electrode.

18. plasma scope as claimed in claim 17, wherein this sparking electrode is by electrically conducting transparent material ITO or SnO ₂Form.

19. plasma scope as claimed in claim 17, wherein this bus electrode is formed by silver or copper.

20. make one and have the method for the plasma scope of higher photoluminescence efficiency for one kind, this method may further comprise the steps:

(a) establish one first glass substrate, define a longitudinal direction and a horizontal direction thereon;

(b) establish one second glass substrate;

(c) between this first glass substrate and second glass substrate, form a plurality of discharge cells, each discharge cell is defined by two longitudinal baffles and two enclosure spaces that lateral partitions was divided into, and includes in each discharge cell that an addressing electrode, one first discharge are kept electrode, electrode, a dielectric layer, a protective seam, a discharge gas and a phosphor body are kept in one second discharge;

(d) with this first glass substrate and this second glass substrate involution;

Wherein, electrode is kept in first discharge in each discharge cell and formed discharge range between the electrode is kept in second discharge, is enlarged to more than 1/2nd of longitudinal pitch of discharge cell.

21. method as claimed in claim 20; wherein this first and second discharge keep electrode parallel to each other and along horizontal expansion be formed on this first glass substrate; this dielectric layer is covered in this discharge and keeps on the electrode; this protective seam is covered on this dielectric layer; this addressing-electrode is formed on this second glass substrate with extending longitudinally; forming vertical lateral partitions that reaches on this addressing-electrode on this second glass substrate; on the sealing area that this phosphor body is coated on vertically and lateral partitions is divided into and on the baffle wall, this discharge gas is filled between this protective seam and this phosphor body.

22. method as claimed in claim 20, wherein the discharge of first in each discharge cell is kept electrode and second and is discharged and keep formed discharge range between the electrode, adds roughly more than 1/2nd of longitudinal pitch of discharge cell.

23. method as claimed in claim 20, wherein the color sequences of the phosphor body in the discharge cell of vertical sequence adopts red, green, blue three look interleaved order modes.

24. method as claimed in claim 20 wherein should vertically reach lateral partitions and form with a sandblast operation.

25. method as claimed in claim 20 wherein should vertically reach lateral partitions and form with a filling work procedure.

26. method as claimed in claim 20, wherein this first and second discharge is kept electrode and is had the design of bigger live width.

27. method as claimed in claim 20, wherein this first and second discharge is kept electrode and is made up of a sparking electrode and a bus electrode.

28. method as claimed in claim 27, wherein this sparking electrode is by electrically conducting transparent material ITO or SnO ₂Form.

29. method as claimed in claim 28, wherein this bus electrode is formed by silver or copper.