CN101496128B

CN101496128B - Plasma display panel

Info

Publication number: CN101496128B
Application number: CN2007800281253A
Authority: CN
Inventors: 吴在永; 全佑坤; 金熙洛; 韩大日
Original assignee: LG Electronics Inc
Current assignee: LG Electronics Inc
Priority date: 2007-05-18
Filing date: 2007-12-31
Publication date: 2012-06-27
Anticipated expiration: 2027-12-31
Also published as: KR20080101459A; CN101490787B; CN101490787A; CN101496128A

Abstract

A plasma display panel is disclosed. The plasma display panel includes a front substrate, a rear substrate positioned to be opposite to the front substrate, a barrier rib positioned between the front substrate and the rear substrate, and a seal layer positioned between the front substrate and the rear substrate. The seal layer includes a bead. An angel between the front substrate and the front substrate in a disposition area of the seal layer ranges from 0.2 degree to 1.0 degree.

Description

Plasma display

Technical field

The present invention relates to a kind of plasma display.

Background technology

Plasma display comprises the luminescent coating that is positioned at by within barrier and the discharge cell that a plurality of electrode separation become.

When drive signal is applied to the electrode of plasma display, in the discharge cell, discharge.In other words, when making plasma display when discharge through apply drive signal to the discharge cell, the discharge gas that charges in the discharge cell produces the VUV Line beam, therefore causes the light-emitting phosphor that is arranged between the barrier, produces visible light thus.Since visible light and on the screen of plasma display display image.

Summary of the invention

According to one embodiment of present invention, a kind of plasma display is provided.This plasma display floater comprises: prebasal plate, on be provided with upper dielectric layer; Metacoxal plate, on be provided with lower dielectric layer, said metacoxal plate is relative with said prebasal plate; Barrier is arranged between prebasal plate and the metacoxal plate; And sealant, be arranged between prebasal plate and the metacoxal plate.Said sealant comprises: pearl; First is arranged in the overlapping region of upper dielectric layer and lower dielectric layer; And second portion, being arranged in the zone of omitting in upper dielectric layer or the lower dielectric layer at least one, the siding-to-siding block length of first is longer than the siding-to-siding block length of second portion.Said pearl comprises head, body and the connecting portion that connects said head and said body, and the size of said connecting portion is less than the size of said head and said body.

Description of drawings

Fig. 1 illustrates the structure according to the plasma display of example embodiment;

Fig. 2 illustrates the example according to the operation of the plasma display of example embodiment;

Fig. 3 illustrates the example of the method for producing plasma display to Fig. 5;

Fig. 6 is the figure that is used to explain sealant;

Fig. 7 is the figure that is used to explain the length of first and second portion to Figure 11;

Figure 12 illustrates the sealant of another kind of form;

Figure 13 and Figure 14 are the figure that is used to explain the thickness of sealant;

Figure 15 is the figure that is used to explain the angle between prebasal plate and the metacoxal plate to Figure 17;

Figure 18 is the figure that is used to explain the prebasal plate bending;

Figure 19 is the figure of size that is used to explain height and the pearl of sealant to Figure 21;

Figure 22 is used to explain the figure of the height of sealant greater than the reason of the height of barrier;

Figure 23 is the figure that is used to explain the method for producing pearl;

Figure 24 is to be used to explain the shape of pearl and the figure of the position that pearl is positioned at sealant to Figure 27;

Figure 28 is the figure that is used to explain the relation between the height of size and barrier of pearl to Figure 30;

Figure 31 is the figure that is used to explain pseudo-barrier; And

Figure 32 illustrates the example according to the plasm display device of example embodiment.

Embodiment

Fig. 1 illustrates the structure according to the plasma display of example embodiment.

As shown in Figure 1, comprise according to the plasma display 100 of example embodiment: prebasal plate 101, on scan electrode 102 is set in parallel with each other and keeps electrode 103; And metacoxal plate 111, on arrange with scan electrode 102 with keep electrode 103 address electrodes intersecting 113.Prebasal plate 101 and metacoxal plate 111 are bonded to each other with against each other through the sealant (not shown).

Upper dielectric layer 104 is arranged on scan electrode 102 and keeps on the electrode 103, scan electrode 102 to be provided and to keep the electric insulation between the electrode 103.

Protective layer 105 is arranged on the upper dielectric layer 104 to promote discharge condition.Protective layer 105 can comprise the material with higher secondary electron yield, for example manganese oxide (MgO).

Lower dielectric layer 115 is arranged on the addressing electrode 113, so that the electric insulation of addressing electrode 113 to be provided.

The barrier 112 of shapes such as strip-type, intersecting parallels, triangle, honeycomb type is arranged on the lower dielectric layer 115, to separate region of discharge (cell promptly discharges).Red (R) discharge cell, green (G) discharge cell, indigo plant (B) discharge cell etc. can be arranged between prebasal plate 101 and the metacoxal plate 111.Except red (R), green (G) and blue (B) discharge cell, white (W) discharge cell or Huang (Y) discharge cell can also be set.

Each discharge cell of being separated by barrier 112 is filled with discharge gas, comprises xenon (Xe), neon (Ne) etc.

Luminescent coating 114 is arranged in the discharge cell, is used for the visible light that image shows with emission during address discharge.For example, first, second that launch red (R), blue (G) and green (B) light respectively can be arranged in the cell that discharges with the 3rd fluorescence coating.Except red (R), green (G) and blue (B) light, the luminescent coating of emission white light or gold-tinted can also be set.

The thickness of at least one of red (R), green (G) and the interior luminescent coating 114 that forms of blue (B) discharge cell can be different with the thickness of other luminescent coating.For example, can red greater than being positioned at (R) the discharge thickness of first luminescent coating of cell of the thickness that is positioned at the second and the 3rd luminescent coating of indigo plant (B) and green (G) discharge cell.The thickness of second luminescent coating can be substantially equal to or be different from the thickness of the 3rd luminescent coating.

The width of red (R), green (G) and blue (B) discharge cell can be roughly the same each other.In addition, the width of at least one can be different with the width of other cell that discharges in red (R), green (G) or blue (B) discharge cell.For example, the width of red (R) discharge cell can be minimum, and the width of green (G) and blue (B) discharge cell can be bigger than the width of red (R) discharge cell.The width of green (G) discharge cell can be substantially equal to or be different from the width of indigo plant (B) discharge cell.Therefore, can improve the colour temperature of plasma display images displayed.

Plasma display 100 can have the structure of various forms of barrier structures and the barrier shown in 1 112.For example, barrier 112 comprises the first barrier 112b and the second barrier 112a.Barrier 112 can have differential type barrier rib structure, and wherein the height of the first and

second barrier

112b and 112a differs from one another.

In differential type barrier rib structure, the height of the first barrier 112b can be less than the height of the second barrier 112a.

Although Fig. 1 has illustrated and described red (R), green (G) and blue (B) discharge cell is arranged situation point-blank, red (R), green (G) and blue (B) discharge cell can be with multi-form arrangements.For example, can adopt red (R), green (G) and blue (B) discharge cell to be arranged in triangular shaped triangular arrangement.In addition, the discharge cell can have various polygonal shapes, for example pentagon and hexagonal shape and rectangular shape.

Although Fig. 1 has illustrated and described barrier 112 and has been formed on the situation on the metacoxal plate 111, barrier 112 can be formed at least one of prebasal plate 101 or metacoxal plate 111.

In Fig. 1, each of upper dielectric layer 104 and lower dielectric layer 115 has single layer structure.Yet upper dielectric layer 104 or lower dielectric layer 115 one of which at least can have sandwich construction.

Although be arranged on width or thickness that addressing electrode 113 on the metacoxal plate 111 can have constant, the width or the thickness that are positioned at the addressing electrode 113 of the little chamber interior of discharge can be different with the width or the thickness of the addressing electrode 113 that is positioned at the little outside of discharge.For example, being positioned at width or the thickness of the addressing electrode 113 of the little chamber interior of discharge can be greater than the width or the thickness of the addressing electrode 113 that is positioned at the little outside of discharge.

Fig. 2 illustrates the example according to the operation of the plasma display of example embodiment.Example embodiment is not limited to shown in Figure 2, and plasma scope can be operated in every way.

As shown in Figure 2, being used for the initialized period that resets, reset signal is provided to scan electrode.Reset signal comprises rising signals and dropping signal.Period that resets further is divided into rising (set-up) period and decline (set-down) period.

Rising signals is provided to scan electrode in the period of rising, and in the discharge cell, is producing weak dark discharge (discharge of promptly rising) during the period of rising thus.Therefore, an amount of wall electric charge of accumulation in the discharge cell.

Dropping signal is provided to scan electrode in the period that descends, and in the discharge cell, produces weak erasure discharge (discharge promptly descends) thus.Therefore, remaining wall electric charge is uniformly in the discharge cell, reaches the degree that address discharge is stably taken place.

The addressing period after the period that resets, the scanning offset signal that roughly remains on the six voltage V6 higher than the minimum voltage V5 of dropping signal is provided to scan electrode.

The sweep signal that descends from the scanning offset signal is provided to scan electrode.

Width in the sweep signal that provides during the addressing period of at least one height field can be different with the width of the sweep signal that during the addressing period of other son field, provides.The width of the sweep signal in the son field can be greater than the width according to the sweep signal in next sub-field of time sequencing.For example; In tactic son field; The width of sweep signal can reduce according to the order of 2.6 μ s, 2.3 μ s, 2.1 μ s, 1.9 μ s etc. gradually, perhaps can reduce gradually according to the order of 2.6 μ s, 2.3 μ s, 2.3 μ s, 2.1 μ s......1.9 μ s, 1.9 μ s etc.

As stated, when sweep signal was provided to scan electrode, the data-signal of corresponding sweep signal was provided to addressing electrode.

Along with the voltage difference between sweep signal and the data-signal is added the wall voltage that produces in the period that resets to, in being provided the discharge cell of data-signal address discharge takes place.

During the addressing period, keep offset signal and be provided to and keep electrode, produce unsettled address discharge owing to keep the interference of electrode to prevent.

Keeping offset signal roughly remains on and keeps bias voltage Vz.Keep bias voltage Vz and be lower than and keep voltage of signals Vs, and be higher than ground potential voltage GND.

Keeping during the period after the addressing period kept signal and can be provided to scan electrode or keep at least one of electrode.For example, keeping signal alternately is provided to scan electrode and keeps electrode.

Along with through carry out wall voltage in the discharge cell that address discharge selects add to keep signal keep voltage Vs, provide when keeping signal at every turn, at scan electrode with keep and keep discharge between the electrode, promptly show and discharge.

At least one height field keep the period during a plurality of signals of keeping are provided, and said a plurality of at least one width of keeping signal can be different with other width of keeping signal.For example, said a plurality of width that first provides in the signal the width of keeping signal can be kept signal greater than other of keeping.Therefore, can more stably keep discharge.

Fig. 3 illustrates the example of the method for producing plasma display to Fig. 5.

As shown in Figure 3, sealant 300 forms at least one edge of prebasal plate 101 or metacoxal plate 111, and prebasal plate 101 utilizes sealant 300 to be bonded to each other with metacoxal plate 111.For example, sealant 300 is formed in the pseudo-zone (dummy area) of metacoxal plate 111, and to make prebasal plate 101 and metacoxal plate 111 be bonded to each other to accomplish integrated structure through prebasal plate 101 and metacoxal plate 111 are exerted pressure be feasible.

As shown in Figure 4, for example the fixture 310 of clip is arranged on the edge of integrated structure.Fixture 310 secure bond structures make prebasal plate 101 aligned with each other until sealant 300 sclerosis with metacoxal plate 111.

Although use fixture 310 that prebasal plate 101 and metacoxal plate 111 are aimed at, fixture 310 may be exerted pressure to the edge of integrated structure, so that the layer of compression seal excessively 300 as shown in Figure 5.As a result, the interval between prebasal plate 101 and the metacoxal plate 111 maybe be inhomogeneous.Because interval heterogeneous, during panel driving first substrate 101 maybe with barrier impact, undue noise possibly take place thus.Sealant 300 comprises that pearl is feasible to reduce noise.

Fig. 6 is the figure that is used to explain sealant.

As shown in Figure 6, the sealant 400 of plasma display 100 comprises pearl 410.

Pearl 410 can support prebasal plate 101 and metacoxal plate 111, and prevents that sealant 400 is by compression excessively.Therefore, the thickness of sealant 400 can keep constant.In addition, pearl 410 can prevent the collision of during panel driving prebasal plate 101 and barrier, reduces generating noise thus.

The example of the method for producing sealant 400 will be described below.

At first, encapsulant, solvent, adhesive and pearl 410 are mixed the sealing lotion that has flowability with formation.

Afterwards, the sealing lotion is coated in prebasal plate 101 or the metacoxal plate 111 on the pseudo-zone of at least one, so that prebasal plate 101 is attached on the metacoxal plate 111.

In baking furnace, carry out calcination process, being melted between prebasal plate 101 and the metacoxal plate 111 encapsulant of the sealing lotion that applies, and burn solvent and adhesive the sealing lotion.Thus, form sealant 400.

If the pearl 410 that mixes with encapsulant melts, then be difficult to suitably keep the interval between prebasal plate 101 and the metacoxal plate 111 in the calcination process of sealing lotion.Therefore, preferably in calcination process, do not melt pearl 410.The fusing point of pearl 410 can be higher than the fusing point of encapsulant.The fusing point of pearl 410 can be equal to or higher than 500 ℃.

Except pearl 410 did not melt in the calcination process of sealing lotion, the material of pearl 410 did not receive concrete restriction.The material of pearl 410 can be metal, plastics, glass, silicon etc.

Upper dielectric layer 104 between prebasal plate 101 and the metacoxal plate 111 is called the first area with the overlapping region of lower dielectric layer 115, and has omitted upper dielectric layer 104 or lower dielectric layer 115 is called second area in the zone of one of which at least.

Sealant 400 can comprise W1 of first that is arranged on the first area and the second portion W2 that is arranged on second area.The W1 of first can overlap with upper dielectric layer 104 and lower dielectric layer 115, and second portion W2 can overlap with one of upper dielectric layer 104 or lower dielectric layer 115.

Because the surface area of sealant 400 that comprises the W1 of first and second portion W2 is greater than the surface area of the sealant that only is arranged on the first area 400 and only be arranged on the surface area of the sealant 400 of second area, so can improve the bonding strength between prebasal plate 101 and the metacoxal plate 111.

In Fig. 6, second portion W2 can overlap with lower dielectric layer 115.Second portion W2 can comprise part Wa and an one of which EDGE CONTACT prebasal plate 101 and the part Wb of individual another EDGE CONTACT metacoxal plate 111 of an one of which EDGE CONTACT prebasal plate 101.In the case, can further improve bonding strength between prebasal plate 101 and the metacoxal plate 111.

In Fig. 6, part Wa and lower dielectric layer 115 overlap, but do not overlap with upper dielectric layer 104.Yet part Wa can overlap with upper dielectric layer 104, and can not overlap with lower dielectric layer 115.

When first direction and second direction parallel with the direct of travel of sealant 400 intersected with first direction, the W1 of first can be longer than the length L 2 (be the siding-to-siding block length of second portion W2) of second portion W2 on second direction in the length L on the second direction 1 (being the siding-to-siding block length of the W1 of first).

Fig. 7 is the figure that is used to explain the length of first and second portion to Figure 11.

As shown in Figure 7; Sealant 400 between prebasal plate 101 and the metacoxal plate 111 comprises W1 of first and second portion W2; Second portion W2 comprises part Wa and part Wb; The W1 of first comprises the first pearl 500a, and part Wa comprises the second pearl 500b, and part Wb comprises the 3rd pearl 500c.

The size of each of first, second and the

3rd pearl

500a, 500b, 500c is labeled as g, and can be each other about equally.Suppose that first, second and the

3rd pearl

500a, 500b and 500c are not modified, and even when first, second is exerted pressure with the

3rd pearl

500a, 500b and 500c the big or small g of

pearl

500a, 500b and 500c also keep constant.The thickness of upper dielectric layer 104 is labeled as t1, and the thickness of lower dielectric layer 115 is labeled as t2.

Interval between prebasal plate 101 and the metacoxal plate 111 (being the interval between upper dielectric layer 104 and the lower dielectric layer 115) can be defined as the big or small g of the first pearl 500a.

Suppose not exert pressure to prebasal plate 101 and metacoxal plate 111, the second pearl 500b can separate from prebasal plate 101 with the interval of t1, and the 3rd pearl 500c can separate from prebasal plate 101 with the interval of (t1+t2).

If the W1 of first does not comprise the first pearl 500a, and is then as shown in Figure 8, the interval between upper dielectric layer 104 and the lower dielectric layer 115 can be through second pearl 500b value of being defined as (g-t1).In the case because vibration during driving, prebasal plate 101 maybe with barrier impact, therefore may increase generating noise.

Consider the description of Fig. 7 and Fig. 8, the W1 of first comprises that pearl is favourable.For this reason, can consider pearl is directly inserted the W1 of first of sealant 400.Yet, because encapsulant mixes with pearl in the processing of producing sealant 400, so be difficult to pearl is inserted first's pearl.

On the contrary, when the length L 1 of the W1 of first during, in the W1 of first, settle pearl easily greater than the length L 2 of second portion W2.

For example, as shown in Figure 9, under the situation of length L 1 less than the length L 2 of second portion W2 of the W1 of first, the W1 of first comprises that the possibility of pearl 410 is lower and second portion W2 comprises that the possibility of pearl 410 is higher.In the case, may increase generating noise.

On the contrary, shown in figure 10, when the length L 1 of the W1 of first during greater than the length L 2 of second portion W2, the W1 of first comprises that the possibility of pearl 410 is higher.

Therefore, the length L 1 of the W1 of first is favourable greater than the length L 2 of second portion W2 to reduce generating noise.

Excessively than the length L of second portion W2 2 under the big situation, shown in figure 11, sealant 400 may be formed in the effective coverage (active area) in the discharge cell of being separated by barrier 112 in the length L 1 of the W1 of first.In order to prevent, can prolong the interval between sealant 400 and the effective coverage.As a result, the zone that display image is not done to contribute increases, and the size of panel possibly unnecessarily increase.

Consider this point, the length L 1 of the W1 of first can be equal to or less than 5 times of length L 2 of second portion W2.

In addition, consider the error in the production process, the length L 1 of the W1 of first can be 1.01 to 5 times a scope of the length L 2 of second portion W2.

Figure 12 illustrates the another kind of form of sealant.

Shown in figure 12, sealant 400 can comprise W1 of first and second portion W2.Second portion can overlap with lower dielectric layer 115, and the edge of second portion W2 can contact prebasal plate 101.In addition, lower dielectric layer 115 can be a section of W3 from the terminal development length of second portion W2.In Figure 12, omitted the part Wb of Fig. 6.

Although lower dielectric layer 115 extends from the end of second portion W2 in Figure 12, upper dielectric layer 104 also can extend from the end of second portion W2.

Figure 13 and Figure 14 are the figure that is used to explain the thickness of sealant.

Shown in figure 13, sealant 400 can comprise the first 401 and the second portion 402 that is exposed to the outward direction of panel of the direction that is exposed to barrier 112.First 401 can be that benchmark is arranged on panel inside with sealant 400, and second portion 402 can be that benchmark is arranged on the panel outside with sealant 400.

Interval marking between first 401 and the barrier 112 is G1, and the interval marking between second portion 402 and the barrier 112 is the G2 longer than interval G1.

The thickness t 3 of first 401 can be less than the thickness t 4 of second portion 402.Therefore, being benchmark with sealant 400 can be less than at outside prebasal plate 101 of panel and the interval W5 between the metacoxal plate 111 at the inner prebasal plate 101 of panel and the interval W4 between the metacoxal plate 111.

As stated, when the thickness t 3 of first 401 during less than the thickness t 4 of second portion 402, because the weight of prebasal plate 101 may cause prebasal plate 101 bendings.Therefore, prebasal plate 101 is not parallel each other with metacoxal plate 111 settings, and 111 one-tenth predetermined angulars of prebasal plate 101 and metacoxal plate.

For example, shown in figure 14, in the zone between first 401 and second portion 402 prebasal plate 101 can with 111 one-tenth θ angles of metacoxal plate.

When the length of sealant 400 is L, angle θ can be at position prebasal plate 101 corresponding with L/2 (promptly being positioned at the mid point P of sealant 400) and the angle between the metacoxal plate 111.

Angle θ can be the angle of direct of travel with 111 one-tenth of the metacoxal plates of prebasal plate 101 in the layout area of sealant 400.In addition, angle θ can be a prebasal plate 101 and be parallel to the angle between the plane of metacoxal plate 111 in the layout area of sealant 400.

Figure 15 is the figure that is used to explain the angle between prebasal plate and the metacoxal plate to Figure 17.

Figure 15 is that the scope of the angle θ between prebasal plate 101 and the metacoxal plate 111 is measured during from 0.1 ° to 1.3 ° and driven noise that produces during the panel and the figure that observes the cross-talk the adjacent discharge cell.

Noise-measuring system is placed on before the plasma display 1m to be sentenced to measure and drives the noise that produces during the panel.In the darkroom when screen applies the video data of preset pattern, through sensitivity test, through not providing under the state of data-signal the quantity of observing the discharge cell that discharge takes place to judge whether to take place cross-talk.A lot of these facts of quantity that are not provided the discharge cell of data-signal mean that the generation of cross-talk is very serious.

At Figure 15, ◎ represents the generation of generating noise and cross-talk less, so the state of panel is outstanding; Zero represents the in good condition of panel; And X represents the generation of generating noise and cross-talk more, so the panel state is poor (X).

Shown in figure 15, when the scope of angle θ is 0.1 ° to 0.15 °, because the generating noise amount is more relatively, so the panel state is poor (X).

For example, shown in figure 16, prebasal plate 101 must be supported with the unlikely because weight of prebasal plate 101 and bending makes that the scope of the angle between prebasal plate 101 and the metacoxal plate 111 is 0.1 ° to 0.15 ° by barrier 112.In the case, although sealant 400 comprises pearl 410, during panel driving, prebasal plate 101 is collision barrier 112 continually, and the generating noise amount possibly increase sharp thus.

When the scope of angle θ is 0.2 ° to 0.25 °, because the generating noise amount reduces, so the panel state is good (zero).

When angle θ is equal to or greater than 0.3 °, can guarantee the interval between prebasal plate 101 and the metacoxal plate 111 fully.Therefore, can prevent the collision of prebasal plate 101 and metacoxal plate 111, and can prevent generating noise.Therefore, the panel state is outstanding (◎).

When the scope of angle θ is 0.1 ° to 0.64 °,, shift so can prevent the electric charge between the adjacent discharge cell because the interval between prebasal plate 101 and the metacoxal plate 111 is fully little.Therefore, the generation of cross-talk reduces and the panel state is outstanding (◎).

When the scope of angle θ was 0.72 ° to 1 °, the generation minimizing of cross-talk and panel state were good (zero).

When angle θ was equal to or greater than 1.2 °, the generation increase of cross-talk and panel state were poor (X).

For example, shown in figure 17, under the state that supports by pearl 410 at the edge of prebasal plate 101 mid portion of prebasal plate 101 fully bending so that angle θ is equal to or greater than 1.2 °.In addition, the interval delta g between prebasal plate 101 and the barrier 112 must extend.Therefore, the electric charge between the adjacent discharge cell shifts frequent the generation, and the generation of cross-talk increases thus.

Consider above description, the angle θ in the first 401 of sealant 400 and the zone between the second portion 402 between prebasal plate 101 and the metacoxal plate 111 can change in 0.2 ° to 1.0 ° scope.Further, angle θ can change in 0.3 ° to 0.64 ° scope.

Figure 18 is the figure that is used to explain the bending of prebasal plate.

Shown in figure 18, because the edge of prebasal plate 101 is to be supported by pearl 410, so the mid portion of prebasal plate 101 is crooked.Prebasal plate 101 can have concave.

Shown in Figure 18 (a), prebasal plate 101 the left end of Figure 18 at the mid point P2 place of sealant 400 can with 2 jiaos of 111 one-tenth θ of metacoxal plate.Shown in Figure 18 (b), prebasal plate 101 the right-hand member of Figure 18 at the mid point P1 place of sealant 400 can with 1 jiao of 111 one-tenth θ of metacoxal plate.Angle θ 1 and θ 2 can perhaps differ from one another each other about equally.

Figure 19 is the figure of size that is used to explain height and the pearl of sealant to Figure 21.

To shown in Figure 21, sealant 400 is arranged on the edge that is positioned at

substrate

101 and 111 between prebasal plate 101 and the metacoxal plate 111, so that prebasal plate 101 is attached to metacoxal plate 111 like Figure 19.The height h2 of sealant 400 can be greater than the height h1 of barrier 112.Therefore, barrier 112 does not contact upper dielectric layer 104, and separates with preset distance and upper dielectric layer 104.

The pearl 410 of sealant 400 suitably keeps the interval between prebasal plate 101 and the metacoxal plate 111.Therefore, the interval between prebasal plate 101 and the metacoxal plate 111 can be by the size decision of pearl 410.For example, the big or small R that supposes pearl 410 is 200 μ m, and the interval between prebasal plate 101 and the metacoxal plate 111 can be equal to or greater than 200 μ m.

Shown in figure 20, the big or small R of pearl 410 can be than the height h1 of barrier 112 Δ T significantly, makes the height h2 of sealant 400 greater than the height h1 of barrier 112.

If in Figure 19, ignore the thickness of protective layer (not shown), then the interval between upper dielectric layer 104 and the lower dielectric layer 115 can be substantially equal to the big or small R of pearl 410.

Shown in figure 21, when pearl 1000 is placed on 1010 last times of horizontal plane, pearl 1000 is at the big or small R that can be expressed as pearl 1000 perpendicular to the maximum height on the direction of horizontal plane 1010.

Pearl 1000 can have identical shaped or difform two pearl forms connected to one another.The pearl (for example pearl 1000) that has at least two pearl forms connected to one another can be called two ovum pearls.

Two ovum pearls 1000 can comprise head 1000b, body 1000a and the size connecting portion 1000c less than the size of head 1000b and body 1000a.Connecting portion 1000c is connected to body 1000a with head 1000b.In other words, two ovum pearls 1000 are the forms that connected two identical shaped or difform pearls (being head 1000b and body 1000a) by connecting portion 1000c.

Two ovum pearls 1000 can disperse the pressure that is applied to prebasal plate 101 and metacoxal plate 111 effectively, and can improve the support strength between prebasal plate 101 and the metacoxal plate 111.Therefore, two ovum pearls 1000 can further reduce generating noise.

Figure 22 is used to explain the figure of the height of sealant greater than the reason of the height of barrier.

In Figure 22, the height h1 of barrier 112 is greater than the height h2 of sealant 400.In the case, although not shown, the size of the pearl that comprises in the sealant 400 is less than the height h1 of barrier 112.

Therefore, because the fixture applied pressure through for example clip makes the height h2 of sealant 400 less than the height h1 of barrier 112, prebasal plate 101 collision barrier 112 continually during plasma display panel driving.Therefore, generating noise possibly increase.

On the other hand; When like Figure 19 and shown in Figure 20; The big or small R of pearl 410 during greater than the height h1 of barrier 112, can prevent that the collision and the generating noise of prebasal plate 101 and barrier 112 from can reduce greater than the height h2 of the height h1 of barrier 112 and sealant 400.

Figure 23 is the figure that is used to explain the method for producing pearl.Figure 24 is to be used to explain the shape of pearl and the figure of pearl position of pearl in sealant to Figure 27.

At first, shown in figure 23, comprise that 1200 pairs of

pearls

1210,1211 and 1212 through predetermined explained hereafter of filter element in a plurality of holes 1201 carry out filter operation.The diameter in hole 1201 can be R1.

More specifically,

pearl

1210,1211 and 1212 is placed on the filter element 1200.Then, size can see through filter element 1200 less than the

pearl

1211 and 1212 of the diameter R1 in hole 1201, and the pearl 1210 of big or small diameter R1 greater than hole 1201 can not see through filter element 1200.

The

pearl

1211 and 1212 that sees through filtration treatment mixes with encapsulant to form sealant.

It is two ovum pearls 1300 of L1 for R length that Figure 24 illustrates size.

Shown in figure 25, filter element 1230 makes two ovum pearls 1300 see through the hole 1231 of filter element 1230 with the longitudinal direction of two ovum pearls 1300, so that two ovum pearls 1300 are filtered.The big or small R of two ovum pearls 1300 is less than the diameter R1 in hole 1231.

Shown in figure 26, two ovum pearls 1300 can be arranged on sealant 400 inside with the transverse direction of two ovum pearls 1300.

Because fixture is exerted pressure to prebasal plate and metacoxal plate in the combination of prebasal plate and metacoxal plate is handled, so two ovum pearl 1300 on the direction that can bear said pressure, for example transversely shown in figure 26, is arranged on the inside of sealant 400.

The big or small R of two ovum pearls 1300 can be defined as the diameter R1 in the hole 1231 of filter element 1230, to filter two ovum pearls 1300.In addition, the big or small R of two ovum pearls 1300 can be defined as the siding-to-siding block length of the maximum of two ovum pearls 1300 on the direction vertical with the direction that sees through hole 1231.

Shown in figure 27, the two ovum pearls 1310 shown in (a) can be arranged in the sealant 400 with the direction of the pressure that can disperse to be applied to prebasal plate and metacoxal plate effectively.For example, two ovum pearls 1310 can be provided with according to (b) of Figure 27.

Two ovum pearls 1310 can see through the hole 1201 of Figure 23 with first direction, can also be arranged in the sealant 400 with the direction that is parallel to first direction.

The big or small R of two ovum pearls 1310 can be defined as two ovum pearls 1310 perpendicular to the length on the direction of first direction.

Figure 28 is the figure that is used to explain the relation between the height of size and barrier of pearl to Figure 30.

At Figure 28 in Figure 30; When the height h of barrier 122 is the scope from 0.9 to 1.8 of big or small R and the ratio R/h of the height h of barrier 122 of 125 μ m and pearl; Measurement is driving the noise that produces during the Plasmia indicating panel, and observes the cross-talk that produces between the adjacent discharge cell.

Noise is to be placed on 1m place before the plasma display and identical video data at noise-measuring system to be provided under the condition of plasma display and to measure.In the darkroom, when screen applies the video data of preset pattern,, do not providing the quantity that the discharge cell of discharge takes place under the state of data-signal to judge whether to take place cross-talk through observing through sensitivity test.A lot of these facts of quantity that are not provided the discharge cell of data-signal mean that the generation of cross-talk is very serious.Suppose that the big or small R of pearl is substantially equal to the height of sealant.

Shown in figure 28, littler because the big or small R of pearl compares with the height h of barrier when than the scope of R/h from 0.9 to 0.95, so prebasal plate possibly contact barrier.Therefore, owing to the frequent impact of prebasal plate in the driving process and barrier, noise possibly increase, and the state of panel is poor (X) thus.

When being 1.01,, can prevent the collision of prebasal plate and barrier because the big or small R of pearl is suitable than R/h.Correspondingly, can reduce generating noise, the panel state is good (zero) thus.In the case, although noise takes place, the generating noise amount possibly be less.

When being equal to or greater than 1.04 than R/h, the big or small R of pearl compares greatly with the height h of barrier, can fully guarantee the interval between barrier and the prebasal plate.Because even the generation vibration still can prevent the collision of prebasal plate and barrier in the driving process, so can prevent generating noise effectively, the panel state is outstanding (◎).

When being 0.9 than R/h, because prebasal plate can contact barrier, the path that can not provide the electric charge between the adjacent discharge cell to shift.Correspondingly, because can reduce because the electric charge between the adjacent discharge cell shifts the generation of the cross-talk that causes, the panel state is good (zero).In the case, because the mid portion of prebasal plate can be more protruding than the marginal portion, the path that can provide the electric charge between the adjacent discharge cell to shift.Yet although cross-talk takes place, the generation of cross-talk can be very little.

When being 1.45 than R/h, prebasal plate with between suitable distance separate with barrier, reduce the generation of cross-talk thus.Shift although electric charge takes place between the adjacent discharge cell, the generation of cross-talk can be very little.

When than the scope of R/h from 0.95 to 1.37, prebasal plate with between enough little interval separate with barrier, to prevent the cross-talk between the adjacent discharge cell.Therefore, cross-talk can reduce, and the panel state is outstanding (◎).

When being equal to or greater than 1.7 than R/h, shown in figure 29, the height of sealant 400 maybe be excessively greater than the height h of barrier 112.Interval between prebasal plate 101 and the barrier 112, shown in the regional A of Figure 29, may be wide excessively.Therefore, can increase cross-talk and panel state is poor (X).

Figure 30 is the figure that the relation between height above sea level and the noise is shown.

On behalf of sealant, 1 type plasma display do not comprise the situation of pearl; The big or small R that 2 type plasma displays are represented pearl and the ratio R/h of the height h of barrier are 1.0 situation (being the height h that the big or small R of pearl is substantially equal to barrier); And the ratio R/h of 3 the type plasma display big or small R that represents pearl and the height h of barrier is 1.1 situation.

When height above sea level 0m, 500m, 1000m, 1500m, 2000m, 2500m, 3000m and

3500m drive

1,2 and 3 type plasma displays, measure noise.

Noisiness is that the noise phase Calais that then each frequency place is recorded is calculated through the noise at each frequency place among measurement 0.5kHz, 1kHz, 2kHz, 4kHz, 8kHz and the 16kHz.Other experiment condition arrives the identical of Figure 30 with Figure 28.

1,2 and 3 type plasma displays can have the noise of about 22dB at height above sea level 0m.

1 type plasma display can have the noise of about 22.7dB, about 24dB, about 25.8dB, about 28dB, about 33.4dB, 40.9dB and about 45.5dB respectively at height above sea level 500m, 1000m, 1500m, 2000m, 2500m, 3000m and 3500m.

In not comprising 1 type plasma display of pearl, along with height above sea level rises to 3500m from 0m, noise rises to 45.5dB from 22dB.

Along with height above sea level rises, the internal pressure of plasma display is greater than the outside atmospheric pressure of panel.Therefore, between prebasal plate and barrier, be provided with closely-spaced since the driving process in vibration, prebasal plate is collision barrier continually, greatly produces noise thus.For example, noise can take place owing to the collision of protective layer on the prebasal plate and the barrier on the metacoxal plate.

2 type plasma displays can have the noise of about 22.3dB, about 22.3dB, about 24dB, about 26.7dB, about 30.1dB, about 36.5dB and about 42.2dB respectively at height above sea level 500m, 1000m, 1500m, 2000m, 2500m, 3000m and 3500m.

In 2 type plasma displays, along with height above sea level rises to 3500m from 0m, noise rises to 42.2dB from 22dB.

3 type plasma displays can have the noise of about 22.1dB, about 22.2dB, about 23.1dB, about 24dB, about 25.8dB, about 27.5dB and about 30.6dB respectively at height above sea level 500m, 1000m, 1500m, 2000m, 2500m, 3000m and 3500m.

In 3 type plasma displays, along with height above sea level rises to 3500m from 0m, noise rises to 30.6dB from 22dB.

Considering the description of Figure 28 to Figure 30, can be from 1.01 to 1.45 than the scope of R/h.Further, the scope than R/h can be from 1.04 to 1.37.

The pressure of discharge gas that can be through the adjustment plasma display reduces the noise that is associated with height above sea level among Figure 30.

For example, under the too high situation of the gas pressure in panel (that is, the internal pressure of panel is greater than the external air pressure of panel), prebasal plate collision barrier continually in the driving process.Therefore, generating noise possibly increase.In the case, instant height above sea level uprises a little, and the generating noise amount also can increase sharp.

On the contrary, under the too low situation of the gas pressure in panel, the quantity of the particle in the discharge gas can reduce.Therefore, the amount of the ultraviolet beam that in the driving process, is produced by discharge gas possibly reduce, and the brightness of image possibly reduce.Therefore, the pressure of discharge gas can be that 350torr is to 450torr.

Figure 31 is the figure that is used to explain pseudo-barrier.

Shown in figure 31, plasma display can comprise the effective coverage that wherein is provided with the discharge cell of being separated by barrier 112, the sealing area that wherein is provided with the pseudo-regional of pseudo-barrier 1500 and wherein is provided with sealant 400.

Pseudo-zone can be arranged on outside the effective coverage, and sealing area can be arranged on outside the pseudo-zone in addition.Pseudo-barrier 1500 can be arranged between the sealant and the barrier in the effective coverage 112 in the sealing area.

Luminescent coating 114 can be arranged in the discharge cell of effective coverage.Pseudo-discharge cell can be separated by the pseudo-barrier in the pseudo-zone 1500.Luminescent coating 114 can be arranged on or can not be arranged in the pseudo-discharge cell.

The height h3 of pseudo-barrier 1500 can be less than the height of sealant 400.The height h3 of pseudo-barrier 1500 can be less than the big or small R that is included in the pearl 410 in the sealant 400.Therefore, can reduce generating noise.

Shown in figure 32, comprise the plasma display 900 and display filter 910 that is used for display image according to the plasm display device of example embodiment.Plasma display 900 is described in detail to Figure 31 through Fig. 1.

Display filter 910 can comprise the screen 920 that is used to shield the light that comes from the outside.Display filter 910 can also comprise chromatograph 930 and electromagnetic interference (EMI) screen 940.

Second viscous layer 951 can be arranged between screen 920 and the chromatograph 930, so that screen 920 is attached to chromatograph 930.The 3rd viscous layer 952 can be arranged between chromatograph 930 and the EMI screen 940, so that chromatograph 930 is attached to EMI screen 940.

Reference numeral 960 expression substrates.Substrate 960 provides the space that can form screen 920, chromatograph 930 and EMI screen 940.Substrate 960 can be processed by polymer resin.

Display filter 910 can also comprise the near-infrared screen.

The position of screen 920, chromatograph 930, EMI screen 940 and substrate 960 can change.For example, EMI screen 940 can be arranged on the substrate 960, and chromatograph 930 can be arranged on the EMI screen 940, and screen 920 can be arranged on the chromatograph 930.

Display filter 910 can be arranged on plasma display 900 fronts.Display filter 910 can be a Thin Film Filter.For example, display filter 910 can comprise first viscous layer 950, and display filter 910 can utilize first viscous layer 950 to attach to the front surface of plasma display 900.

The reason that display filter 910 is Thin Film Filters is described below.

Display filter 910 can mainly be categorized as glass filter and Thin Film Filter.

Glass filter has following structure, and promptly at least one functional layer is stacked on the glass substrate as basal layer.Glass filter can separate with the front surface of preset distance and plasma display.

Thin Film Filter is more cheap than glass filter, and can easily attach to the front surface of plasma display through laminating.In order glass filter to be arranged on the plasma display front, it is essential being used to keep the structure with the support glass filter, increases the production cost of glass filter thus.

Because glass substrate is the base substrate of glass filter, so glass filter can prevent to a certain extent that the noise that plasma display produces is discharged into the external world in the driving process.

On the other hand, because the substrate that Thin Film Filter is processed based on for example polymer resin, so the degree of protection of the noise that Thin Film Filter article on plasma body display floater produces in the driving process is lower to the degree of protection of the noise of generation than glass filter.Thin Film Filter can cause the problem of noise.

The size that comprises pearl and pearl when the sealant of the preceding and metacoxal plate that is used to attach plasma display can reduce generating noise during greater than the height of barrier.

Because the plasma display according to example embodiment comprises pearl, can reduce generating noise.

Although being arranged on the Thin Film Filter of the plasma display front that comprises pearl does not prevent the noise that in the driving process, in plasma display, produces from still can solve noise problem, and can reduce production cost.

Therefore, owing to comprise sealant that comprises pearl and the Thin Film Filter that is used as display filter, can realize the minimizing of production cost and preventing of noise according to the plasma display of example embodiment.

The foregoing description and advantage only are exemplary and be not understood that limitation of the present invention.Principle of the present invention can easily be applied to the device of other type.The description of the foregoing description is intended to explanation, and does not limit the scope of claim.It is multiple that to substitute, revise and change will be tangible to those skilled in the art.

Claims

1. plasma display comprises:

Prebasal plate, on be provided with upper dielectric layer;

Metacoxal plate, on be provided with lower dielectric layer, said metacoxal plate is relative with said prebasal plate;

Barrier is arranged between prebasal plate and the metacoxal plate; And

Sealant is arranged between prebasal plate and the metacoxal plate;

Said sealant comprises:

Pearl;

First is arranged in the overlapping region of upper dielectric layer and lower dielectric layer; And

Second portion is arranged in the zone of omitting in upper dielectric layer or the lower dielectric layer at least one, and the siding-to-siding block length of first is longer than the siding-to-siding block length of second portion,

Wherein, said pearl comprises head, body and the connecting portion that connects said head and said body, and the size of said connecting portion is less than the size of said head and said body.

2. plasma display according to claim 1, wherein the siding-to-siding block length of first is 1.01 to 5 times of siding-to-siding block length of second portion.

3. plasma display according to claim 1, the thickness of wherein said sealant is greater than the height of said barrier.

4. plasma display according to claim 1, the size of wherein said pearl is greater than the height of said barrier.

5. plasma display according to claim 1, the scope from 1.01 to 1.45 of the ratio of the size of wherein said pearl and the height of said barrier.

6. plasma display according to claim 1, the size of wherein said pearl equal upper dielectric layer and the interval between the lower dielectric layer on the metacoxal plate on the prebasal plate.