CN101111919B - Plasma display panel - Google Patents
Plasma display panel Download PDFInfo
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- CN101111919B CN101111919B CN200680003643.5A CN200680003643A CN101111919B CN 101111919 B CN101111919 B CN 101111919B CN 200680003643 A CN200680003643 A CN 200680003643A CN 101111919 B CN101111919 B CN 101111919B
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Abstract
In a plasma display panel, a discharge space is formed by arranging a front substrate (2) and a rear substrate to face each other and sealing the circumference. In the front substrate, a display electrode (6), a dielectric layer (8) and a protection layer (9) are formed on a front glass substrate (3), and in the rear substrate, an electrode, barrier ribs and a phosphor layer are formed on a substrate. The display electrode (6) contains at least silver, and the dielectric layer (8) is composed of a first dielectric layer (81) which covers the display electrode (6) and contains bismuth oxide, and a second dielectric layer (82) which covers the first dielectric layer (81) and contains bismuth oxide. The quantity of the bismuth oxide contained in the second dielectric layer (82) is less than that of the bismuth oxide contained in the first dielectric layer (81).
Description
Technical field
The present invention relates to the middle Plasmia indicating panels that use such as display unit.
Background technology
Plasmia indicating panel (hereinafter referred to as PDP) is because want to realize high-definition, big pictureization, so the TV of 65 inches screens etc. become commercialized.In recent years, it was application in the high definition TV more than 2 times that PDP is advancing compare number of scanning lines with existing NTSC mode, and, consider environmental problem and require PDP not contain lead composition.
PDP is made of front panel and backplate substantially.Front panel comprises: the borsal of floating (float) manufactured is the strip like transparent electrode that forms on interarea of glass substrate, glass substrate of glass and bus electrode and the show electrode that constitutes, cover show electrode and the protective layer that constitutes as the dielectric layer of capacitor work and the magnesium oxide that forms on dielectric layer (MgO).Backplate comprises: barrier that forms on the strip addressing electrode that forms on glass substrate, the one interarea, the base dielectric that covers addressing electrode, the base dielectric and the luminescent coating that sends redness, green and blue light respectively that forms between each barrier.
Front panel and backplate are enclosed the discharge gas of Ne-Xe making under the relative state of its electrode forming surface side by hermetic seal with the pressure of 400Torr～600Torr in the discharge space of being separated by barrier.PDP discharges by selectively image signal voltage being applied to show electrode, and the luminescent coating ultraviolet ray exited of all kinds that produces owing to this discharge sends the light of redness, green, blueness, thereby realizes that coloured image shows.
In the bus electrode of show electrode, use silver electrode, use with lead oxide to the low melting point glass of main component as dielectric layer in order to guarantee conduction.Considered environmental problem in recent years, the spy opens 2003-128430 communique, spy and opens 2002-053342 communique, spy and open the 2001-048577 communique and specially open flat 9-050769 communique and disclose the example that does not contain the dielectric layer of lead composition.
As described above, advancing that compare number of scanning lines with existing NTSC mode be to use PDP in the high definition TV more than 2 times.
Such high-definition makes number of scanning lines increase, and the show electrode number increases, thereby show electrode diminishes at interval.Therefore, the silver ion that is diffused into dielectric layer or glass substrate from the silver electrode that constitutes show electrode becomes many.If silver ion is diffused in dielectric layer or the glass substrate,, form silver colloid owing to the divalent tin ion that contains in alkali metal ion in the dielectric layer or the glass substrate is subjected to reduction.Therefore, obviously become the flavescence phenomenon of yellow or brown, and silver oxide is subjected to reduction and produces oxygen, and makes and produces bubble in the dielectric layer at dielectric layer or glass substrate.
Therefore because the increase of number of scanning lines, the flavescence of glass substrate or the bubble in the dielectric layer become more remarkable, picture quality is obviously impaired and the defective insulation of dielectric layer takes place.
Yet, consider environmental problem and in the example of the existing dielectric layer that does not contain lead composition that proposes, have such problem: can not satisfy simultaneously to the inhibition of this flavescence phenomenon and to the inhibition of the defective insulation of dielectric layer.
Summary of the invention
PDP of the present invention is; to on glass substrate, be formed with the front panel of show electrode and dielectric layer and protective layer; with the backplate that on substrate, is formed with electrode and barrier and luminescent coating; both relative configurations and peripheral seal are to form discharge space; show electrode contains silver at least; and; dielectric layer comprises; cover first dielectric layer that contains bismuth oxide of show electrode; and second dielectric layer that contains bismuth oxide that covers first dielectric layer, the content of the bismuth oxide of second dielectric layer is than the content of the bismuth oxide of first dielectric layer still less.
Such structure, the flavescence phenomenon can not take place in its dielectric layer, and the dielectric voltage withstand performance is deterioration not, and visible light transmissivity is higher, thereby can realize the high PDP of display quality of environmental protection.
Description of drawings
Fig. 1 is the stereogram of the structure of expression embodiment of the present invention PDP.
Fig. 2 is the profile of front panel of structure of the dielectric layer of expression embodiment of the present invention PDP.
Description of reference numerals
1 PDP
2 front panels
3 front glass substrates
4 scan electrodes
4a, the 5a transparency electrode
4b, the 5b metal bus electrode
5 keep electrode
6 show electrodes
7 photo-shield strips (light shield layer)
8 dielectric layers
9 protective layers
10 backplates
11 back side glass substrates
12 addressing electrodes
13 base dielectric
14 barriers
15 luminescent coatings
16 discharge spaces
81 first dielectric layers
82 second dielectric layers
Embodiment
Use the PDP of description of drawings embodiment of the present invention below.
(execution mode)
Fig. 1 is the stereogram of the structure of expression embodiment of the present invention PDP.The basic structure of PDP is identical with general interchange surface discharge type PDP.As described in Figure 1, among the PDP1, the front panel 2 that constitutes by front glass substrate 3 grades, with the backplate 10 that is made of back side glass substrate 11 grades that front panel 2 disposes in opposite directions, both peripheries are by the seal member that is made of glass dust etc. and by hermetic seal.The discharge gas of Ne and Xe etc. is enclosed with the pressure of 400Torr～600Torr in the discharge space 16 of PDP1 inside of sealing.
The configuration multiple row is parallel to each other on the front glass substrate 3 of plate 2 in front, by a pair of scan electrode 4 and keep the show electrode 6 and photo-shield strip (light shield layer) 7 of the band shape that electrode 5 constitutes.On the glass substrate 3,, form dielectric layer 8 in front, form protective layer 9 again on its surface by formations such as magnesium oxide (MgO) as capacitor work to cover the mode of show electrode 6 and light shield layer 7.
Overleaf on the back side glass substrate 11 of plate 10, with the scan electrode 4 of front panel 2 and keep on the perpendicular direction of electrode 5, the multi-ribbon shape addressing electrode 12 that configuration is parallel to each other, base dielectric 13 covers these addressing electrodes.And, on the base dielectric 13 of 12 of addressing electrodes, be formed for the barrier 14 of the specified altitude in dividing discharge space 16.On each addressing electrode 12 in the groove of 14 of barriers, form the luminescent coating 15 that utilizes ultraviolet ray and send redness, green and blue light respectively by the order coating.At scan electrode 4 and keep electrode 5 and form arc chamber with the position that addressing electrode 12 intersects, the arc chamber with redness, green, blue phosphor layers 15 parallel with the direction of show electrode 6 is configured for the colored pixel that shows.
Fig. 2 represents the profile of front panel 2 of structure of dielectric layer 8 of the PDP1 of embodiment of the present invention, and Fig. 2 shows in the mode that turns upside down with Fig. 1.As described in Figure 2, on the front glass substrate made from float glass process etc. 3, form by scan electrode 4 and keep the pattern of show electrode 6 that electrode 5 constitutes and light shield layer 7.Scan electrode 4 with keep electrode 5 respectively by indium tin oxide (ITO) or tin oxide (SnO
2) wait transparency electrode 4a, the 5a of formation and the metal bus electrode 4b that on transparency electrode 4a, 5a, forms, 5b to constitute. Metal bus electrode 4b, 5b be for conduction on the longitudinally that makes transparency electrode 4a, 5a be that the electric conducting material of main component forms with silver (Ag) material.
The manufacture method of PDP then, is described.Form scan electrode 4 at first, in front on the glass substrate 3, keep electrode 5 and light shield layer 7.This transparency electrode 4a, 5a and metal bus electrode 4b, 5b utilize photoetching process etc. and form pattern.Transparency electrode 4a, 5a are to use thin-film technique etc. to form, and metal bus electrode 4b, 5b carry out the roasting sclerosis in the temperature of hope to the lotion that comprises silver (Ag) material to obtain.And light shield layer 7 is also similar, is to comprise after the lotion silk screen printing of black pigment or black pigment is formed on after whole of glass substrate goes up, and uses photoetching process to form pattern and forms through roasting.
Next, to cover scan electrode 4, to keep the mode of electrode 5 and light shield layer 7, in front on the glass substrate 3 with coating dielectric cream such as slot coated (die coat) methods, and form dielectric cream layer (dielectric material layer).After the coating dielectric cream, place the stipulated time, make the dielectric cream surface smoothing that has been coated with, become flat surfaces.Then, by roasting sclerosis dielectric cream layer, form the dielectric layer 8 that covers scan electrode 4, keeps electrode 5 and light shield layer 7.Dielectric cream is the coating that comprises dielectric substance, adhesive and solvents such as glass powder.Secondly, on dielectric layer 8, form the protective layer 9 that constitutes by magnesium oxide (MgO) by vacuum vapour deposition.By above-mentioned operation, formed regulation works (scan electrode 4, keep electrode 5, light shield layer 7, dielectric layer 8, protective layer 9) in front on the glass substrate 3, finish front panel 2.
On the other hand, backplate 10 forms in the following manner.At first, overleaf on the glass substrate 11, silk screen printing comprises after the lotion of silver (Ag) material, after on perhaps metal film being formed on whole, use photoetching process to form pattern, utilize such method, form material layer as addressing electrode 12 works, this material layer of roasting at a certain temperature forms addressing electrode 12 thus.Next, on the back side glass substrate 11 that has formed addressing electrode 12, utilize slot coated method etc., be coated with dielectric cream, form dielectric cream layer in the mode that covers addressing electrode 12.Then, form base dielectric 13 by roasting dielectric cream layer.Dielectric cream is the coating that comprises dielectric substance, adhesive and solvents such as glass powder.
Then, on base dielectric 13, be coated with the barrier formation that comprises barrier material and use cream, carry out patterning, form the barrier material layer like this and carry out afterwards roasting, thereby form barrier 14 with the regulation shape.At this, as the barrier of coating on base dielectric 13 method with the cream patterning, can be with photoetching process or sand-blast (sandblast) etc.Secondly, being coated with phosphor body cream and the roasting that comprises the phosphor body material on the base dielectric 13 of 14 of adjacent barriers and on the side of barrier 14, form luminescent coating 15 thus.By above operation, finish the backplate 10 that has the regulation structure member on the glass substrate 11 overleaf.
Describe first dielectric layer 81 and second dielectric layer 82 of the dielectric layer 8 that constitutes front panel 2 below in detail.The dielectric substance of first dielectric layer 81 is made of following material composition.That is, comprising weight ratio (percentage by weight) is 20%～40% bismuth oxide (Bi
2O
3), comprise weight ratio and be 0.5%～12% at least a composition of from calcium oxide (CaO), strontium oxide strontia (SrO) and barium monoxide (BaO), selecting, also comprise weight ratio and be 0.1%～7% from molybdenum oxide (MoO
3), tungsten oxide (WO
3), cerium oxide (CeO
2), manganese dioxide (MnO
2) the middle at least a composition of selecting.
Yet, replace molybdenum oxide (MoO
3), tungsten oxide (WO
3), cerium oxide (CeO
2), manganese dioxide (MnO
2), also can comprise weight ratio and be 0.1%～7% from cupric oxide (CuO), chromium oxide (Cr
2O
3), cobalt oxide (Co
2O
3), vanadium oxide (V
2O
7) and antimony oxide (Sb
2O
3) the middle at least a composition of selecting.
In addition, except aforementioned composition, can also comprise weight ratio and be 0%～40% zinc oxide (ZnO), weight ratio and be 0%～35% boron oxide (B
2O
3), weight ratio is 0%～15% silica (SiO
2), weight ratio is 0%～10% aluminium oxide (Al
2O
3) material composition that does not contain lead composition that waits, the content of these material compositions is not particularly limited, in the content range of the material composition of prior art.
Utilize wet type jet pulverizer or ball mill, the dielectric substance that these constituents constitute is pulverized to average grain diameter is 0.5 μ m～2.5 μ m, make the dielectric substance powder.Then, be that 55%～70% this dielectric substance powder and weight ratio are 30%～45% adhesive ingredients with weight ratio, fully mix with three rolls (roll), make slot coated with or the first dielectric layer cream of printing usefulness.
Adhesive ingredients is ethyl cellulose (ethylcellulose) or contains terpinol or the butyl carbitol acetate (butyl carbitolacetate) that weight ratio is 1%～20% acrylic resin.And, in lotion, can also add dioctyl phthalate, dibutyl phthalate, triphenyl phosphate, tributyl phosphate as required as plasticizer, also can add glyceryl monooleate (glycerol monooleate) as dispersant, Arlacel-83 (sorbitan sesquioleate), alkyl aryl phosphate ester (alkyl-aryl phosphate ester) etc., thereby improve printing.
Then, with this first dielectric layer cream, be printed onto on the front glass substrate 3 in the mode that covers show electrode 6 with slot coated method or silk screen print method, and make its drying, then, 575 ℃～590 ℃ following roastings of temperature higher slightly than the softening point of dielectric substance form first dielectric layer 81.
The following describes second dielectric layer 82.The dielectric substance of second dielectric layer 82 is made of following material composition.That is, comprising weight ratio is 11%～20% bismuth oxide (Bi
2O
3), also comprise weight ratio and be 1.6%～21% at least a composition of from calcium oxide (CaO), strontium oxide strontia (SrO) and barium monoxide (BaO), selecting, and comprise weight ratio be 0.1%～7% from molybdenum oxide (MoO
3), tungsten oxide (WO
3), cerium oxide (CeO
2) the middle at least a composition of selecting.
Yet, replace molybdenum oxide (MoO
3), tungsten oxide (WO
3) and cerium oxide (CeO
2), can be comprise weight ratio be 0.1%～7% from cupric oxide (CuO), chromium oxide (Cr
2O
3), cobalt oxide (Co
2O
3), vanadium oxide (V
2O
7), antimony oxide (Sb
2O
3) and manganese oxide (MnO
2) the middle at least a composition of selecting.
And, except mentioned component, also can include weight ratio and be 0%～40% zinc oxide (ZnO), weight ratio and be 0%～35% boron oxide (B
2O
3), weight ratio is 0%～15% silica (SiO
2), weight ratio is 0%～10% aluminium oxide (Al
2O
3) material composition that does not contain lead composition that waits, the content of these material compositions is not particularly limited, in the content range of the material composition of prior art.
With wet type jet pulverizer or ball mill, will be ground into average grain diameter by the dielectric substance that these constituents constitute is 0.5 μ m～2.5 μ m, is made into the dielectric substance powder.Then, weight ratio is that 55%～70% this dielectric substance powder, weight ratio are 30%～45% adhesive ingredients, fully mixes with three rolls, make slot coated with or the second dielectric layer cream of printing usefulness.Adhesive ingredients is ethyl cellulose or comprises terpinol or the butyl carbitol acetate that weight ratio is 1%～20% acrylic resin.And, in the lotion, can also add dioctyl phthalate, dibutyl phthalate, triphenyl phosphate, tributyl phosphate as required as plasticizer, also can add glyceryl monooleate as dispersant, Arlacel-83, alkyl aryl phosphate ester etc., to improve printing.
Then,, be printed onto on first dielectric layer 81, make its drying again with silk screen print method or slot coated method with this second dielectric layer cream.Then, 550 ℃～590 ℃ following roastings of temperature higher slightly than the softening point of dielectric substance form second dielectric layer 82.
About the film thickness of dielectric layer 8, in order to guarantee visible light transmissivity, preferred first dielectric layer 81 and second dielectric layer 82 add up to below the 41 μ m.In order to suppress the reaction of metal bus electrode 4b, 5b and silver (Ag), the bismuth oxide (Bi of first dielectric layer 81
2O
3) content than the bismuth oxide (Bi of second dielectric layer 82
2O
3) content is more, weight ratio is 20%～40%.Therefore, the visible light transmissivity of first dielectric layer 81 is lower than the visible light transmissivity of second dielectric layer 82, so the thickness of Film Thickness Ratio second dielectric layer 82 of first dielectric layer 81 is thinner.
In addition, bismuth oxide (Bi in second dielectric layer 82
2O
3) weight ratio is 11% when following, though not easy to change, be easy to generate bubble in second dielectric layer 82.And, if weight ratio surpasses at 40% o'clock, the easy variable color that then becomes, not ideal enough for improving transmitance.
And the film thickness of dielectric layer 8 is more little, and the effect that improves panel luminance and reduction discharge voltage is remarkable more, therefore, preferably is set at, and makes film thickness as far as possible little in the scope that does not reduce dielectric voltage withstand.From such angle, in the embodiment of the present invention, the film thickness of dielectric layer 8 is set at below the 41 μ m, and first dielectric layer 81 is 5 μ m～15 μ m, and second dielectric layer 82 is 20 μ m～36 μ m.
Confirm, the PDP of Zhi Zaoing like this, even use silver (Ag) material in show electrode 6, the metachromatism of front glass substrate 3 (flavescence) is also few, and, can gassing in the dielectric layer 8 etc., realize the good dielectric layer of dielectric voltage withstand performance.
Next, analyze the PDP of embodiment of the present invention, utilize this dielectric substance, repressed reason takes place in flavescence or bubble in first dielectric layer 81.That is, be known that if containing bismuth oxide (Bi
2O
3) dielectric glass in add molybdenum oxide (MoO
3) or tungsten oxide (WO
3), then under the low temperature below 580 ℃, generate Ag easily
2MoO
4, Ag
2Mo
2O
7, Ag
2Mo
4O
13, Ag
2WO
4, Ag
2W
2O
7, Ag
2W
4O
13Compound.In the embodiment of the present invention, the sintering temperature of dielectric layer 8 is 550 ℃～590 ℃, so, be diffused into the silver ion (Ag in the dielectric layer 8 in the roasting
+) with dielectric layer 8 in molybdenum oxide (MoO
3), tungsten oxide (WO
3) cerium oxide (CeO
2), manganese oxide (MnO
2) react, generate stable compound, thereby settle out.In other words, silver ion (Ag
+) be not reduced but settle out, there is not aggegation to generate colloid.Therefore, by making silver ion (Ag
+) stabilisation, be accompanied by the colloidization of silver (Ag) and the oxygen that takes place also tails off, therefore, the generation of the bubble in the dielectric layer 8 has also just tailed off.
On the other hand, in order to realize such effect effectively, contain bismuth oxide (Bi
2O
3) dielectric glass in, molybdenum oxide (MoO
3), tungsten oxide (WO
3), cerium oxide (CeO
2), manganese oxide (MnO
2) content be more than 0.1% preferably in weight ratio, weight ratio is better below 7% more than 0.1%.Particularly, if less than weight ratio 0.1%, the effect that suppresses flavescence is relatively poor, if overweight than 7%, generation variable color then on glass, not ideal enough.
Promptly, the dielectric layer 8 of the PDP of embodiment of the present invention, in contacted first dielectric layer 81 of metal bus electrode 4b, 5b that constitutes with silver (Ag) material, suppressing flavescence phenomenon and bubble takes place, second dielectric layer 82 that utilization is provided with on first dielectric layer 81 is realized higher light transmission rate.Therefore, can realize whole dielectric layer 8 few gassings and PDP flavescence, that transmitance is higher.
(embodiment)
The PDP of embodiment of the present invention, the height of the barrier of arc chamber is 0.15mm, the interval of barrier (arc chamber spacing) is that the interelectrode distance of 0.15mm, show electrode is 0.06mm, with the content of enclose pressing 60kPa to enclose Xe is that volume ratio is the mist of Ne-Xe system of 15%, make the PDP that is applicable to 42 inches high definition TVs like this, estimate its performance.
First dielectric layer and second dielectric layer of material composition shown in subordinate list 1 and the table 2 make up these dielectric layers under making, and make the PDP of condition as shown in table 3.In the table 3, the embodiment of the PDP of embodiment of the present invention is by panel number 1～26 expression, and comparative example is by panel number 27～30 expressions.And sample No.A12, the A13 of material composition, B6, B7 also are and the present invention's comparative example relatively in table 1 and the table 2.In addition, as the project " other, material composition " of the material composition shown in table 1 and the table 2, be zinc oxide (ZnO), boron oxide (B as the aforementioned
2O
3), silica (SiO
2), aluminium oxide (Al
2O
3) material composition that does not contain lead composition that waits, the content of these material compositions is not particularly limited, in the content range of the material composition of prior art.
Table 1
*Sample No.A12 and sample No.A13 are comparative examples
*" other material composition " do not contain lead composition
Table 2
*Sample No.B6 and sample No.B7 are comparative examples
*" other material composition " do not contain lead composition
Table 3
| Panel number | The second dielectric layer sample No/, the first dielectric layer sample No | The second dielectric layer thickness/first dielectric layer thickness (μ m) | The transmitance of dielectric layer (%) | b ＊Value | Insulation breakdown panel number (individual) after the accelerated aging test |
| 1 | No.B1/No.A1 | 20/15 | 90 | 1.8 | 0 |
| 2 | No.B2/No.A2 | 26/13 | 89 | 1.9 | 0 |
| 3 | No.B3/No.A3 | 30/10 | 87 | 1.9 | 0 |
| 4 | No.B4/No.A4 | 26/14 | 88 | 2 | 0 |
| 5 | No.B5/No.A5 | 35/5 | 89 | 2.8 | 0 |
| 6 | No.B1/No.A6 | 23/15 | 86 | 2 | 0 |
| 7 | No.B2/No.A7 | 25/10 | 88 | 2.1 | 0 |
| 8 | No.B3/No.A8 | 25/10 | 89 | 1.7 | 0 |
| 9 | No.B4/No.A9 | 25/10 | 90 | 2 | 0 |
| 10 | No.B2/No.A3 | 28/10 | 88 | 2.1 | 0 |
| 11 | No.B3/No.A4 | 25/10 | 91 | 2 | 0 |
| 12 | No.B4/No.A5 | 25/10 | 87 | 2.4 | 0 |
| 13 | No.B5/No.A6 | 25/10 | 88 | 2.2 | 0 |
| 14 | No.B1/No.A3 | 25/10 | 90 | 2 | 0 |
| 15 | No.B5/No.A4 | 25/12 | 89 | 2.4 | 0 |
| 16 | No.B3/No.A5 | 25/10 | 88 | 2.5 | 0 |
| 17 | No.B3/No.A6 | 25/12 | 87 | 2.1 | 0 |
| 18 | No.B2/No.A1 | 25/10 | 91 | 1.8 | 0 |
| 19 | No.B3/No.A1 | 22/15 | 88 | 2 | 0 |
| 20 * | No.B1/No.A12 | 25/10 | 91 | 2.1 | 3 |
| 21 * | No.B3/No.A13 | 25/10 | 87 | 13.4 | 2 |
| 22 * | No.B11/No.A12 | 25/10 | 85 | 2.6 | 3 |
| 23 * | No.B12/No.A3 | 25/10 | 90 | 2 | 3 |
*Panel number 20～23rd, comparative example
As described in table 1～table 3, the PDP of panel number 1～23, on metal bus electrode 4b, 5b that silver (Ag) material constitutes, covered by first dielectric layer 81, first dielectric layer 81 is to obtain 560 ℃～590 ℃ following roastings with the dielectric glass that contains following compositions: comprise weight ratio at least and be 20%～40% bismuth oxide (Bi
2O
3) and weight ratio be 0.1%～7% from molybdenum oxide (MoO
3), tungsten oxide (WO
3), cerium oxide (CeO
2), manganese oxide (MnO
2) the middle at least a composition of selecting, and its thickness is 5 μ m～15 μ m.And forming second dielectric layer, 82, the second dielectric layers 82 on this first dielectric layer 81 is to form like this: use that to contain weight ratio at least be 11%～20% bismuth oxide (Bi
2O
3) and weight ratio be 0.1%～7% from molybdenum oxide (MoO
3), tungsten oxide (WO
3), cerium oxide (CeO
2) in the dielectric glass of at least a composition selected, 550 ℃～570 ℃ following roastings, forming thickness is second dielectric layer 82 of 20 μ m～35 μ m.
The PDP of panel number 20,21 is the bismuth oxide (Bi in the dielectric glass of first dielectric layer 81 shown in the formation table 1
2O
3) the less situation of content under, do not comprise molybdenum oxide (MoO
3), tungsten oxide (WO
3), cerium oxide (CeO
2), manganese oxide (MnO
2) in result under any situation; The PDP of panel number 29,30 is the bismuth oxide (Bi that constitute in the dielectric glass of second dielectric layer 82
2O
3) the more situation of content under, do not comprise molybdenum oxide (MoO
3), tungsten oxide (WO
3), cerium oxide (CeO
2) in result under any situation.
Make the PDP of these panel numbers 1～23, carry out the evaluation of following project, its evaluation result is represented in table 3.At first, use the transmitance of spectrometer measurement front panel 2.Measurement is the influence that deducts electrode from the transmitance of front glass substrate 3, tries to achieve the actual transmitance of dielectric layer 8.
And (CR-300 that Minolta company makes) measures the degree of the flavescence that causes owing to silver (Ag) with the color meter, measures the b of the yellow degree of expression
*Value.The b that flavescence exerts an influence to the display performance of PDP
*The threshold value of value is b
*=3, this value is big more, and then flavescence is eye-catching more, causes color temperature to reduce, and the effect of PDP is undesirable.
And, the PDP of panel number 1～23 is respectively made 20, carry out accelerated aging test.Accelerated aging test is to keep voltage 200V in discharge, frequency 50kHz continuous discharge in following 4 hours.Then, (dielectric voltage withstand defective) PDP that estimates the dielectric layer destroyed have what.Because the dielectric voltage withstand defective is caused by the defective of the bubble that takes place in the dielectric layer 8 etc., so can think, the dielectric layer 8 more gassings of the panel of insulation breakdown take place.
As shown in Table 3, in PDP corresponding to the panel number 1～19 of the PDP of embodiment of the present invention, being suppressed of flavescence that silver (Ag) causes and bubble, the visible light transmissivity of dielectric layer is up to 86%～91%, and, the b relevant with flavescence
*Value is also low to 1.7～2.8, does not also have the insulation breakdown after the accelerated aging test.
On the contrary, the bismuth oxide (Bi in the dielectric glass of first dielectric layer
2O
3) few be among the PDP of 15% panel number 20 to weight ratio, the b of expression flavescence degree
*Be worth little of 2.1, still because the mobile variation of dielectric glass, so and the adherence between show electrode and the front glass substrate worsen gassing on the interface particularly.Therefore, the insulation breakdown after the accelerated aging test becomes many.And, oxygen-free molybdenum (MoO in the dielectric glass of first dielectric layer
3), tungsten oxide (WO
3), cerium oxide (CeO
2), manganese dioxide (MnO
2) panel number 21 in, the flavescence degree is big, so the generation of bubble and insulation breakdown become many.
And, the bismuth oxide (Bi in the dielectric glass of second dielectric layer
2O
3) the more panel number 22 of content in, visible light transmissivity descends, simultaneously, it is many that the bubble in the dielectric layer becomes.On the other hand, the bismuth oxide (Bi in the dielectric glass of second dielectric layer
2O
3) content few, oxygen-free molybdenum (MoO
3), tungsten oxide (WO
3), cerium oxide (CeO
2) panel number 23 in, visible light transmissivity is good, but because glass mobile relatively poor, so more gassing, insulation breakdown significantly increases.
In addition, in the dielectric substance, there is measure error about weight ratio ± 0.5% in the numerical quantity that contains of above-mentioned each material composition, in the dielectric layer after the roasting, has the measure error about weight ratio ± 2%.The material composition of content that comprises the number range of this error also can obtain the effect identical with the present invention.
The PDP of embodiment of the present invention can provide as mentioned above, the visible light transmissivity height of dielectric layer, and dielectric voltage withstand performance height, and do not contain the PDP of the environmental protection of lead composition.
The industry utilizability
PDP of the present invention provides the not flavescence of a kind of dielectric layer and dielectric voltage withstand performance not deteriorated as mentioned above, and the high PDP of the display quality of environmental protection, and is useful in large picture display device etc.
Claims (7)
1. Plasmia indicating panel; by the front panel that on glass substrate, is formed with show electrode and dielectric layer and protective layer; with the backplate that on substrate, is formed with electrode and barrier and luminescent coating; both relative configurations and peripheral seal are to form discharge space, and described Plasmia indicating panel is characterised in that:
Described show electrode contains silver at least, described dielectric layer is made of second dielectric layer that contains bismuth oxide that does not contain lead and cover first dielectric layer that contains bismuth oxide of described show electrode and cover described first dielectric layer, at least contain at least a in molybdenum oxide and the tungsten oxide in any of described first dielectric layer or described second dielectric layer, the content of the bismuth oxide of described second dielectric layer lacks than the content of the bismuth oxide of described first dielectric layer.
2. Plasmia indicating panel according to claim 1 is characterized in that:
It is more than 20% and 40% following bismuth oxide that described first dielectric layer comprises weight ratio.
3. Plasmia indicating panel according to claim 2 is characterized in that:
It is more than 0.1% and the 7% following at least a composition of selecting in molybdenum oxide and tungsten oxide that described first dielectric layer contains weight ratio.
4. Plasmia indicating panel according to claim 1 is characterized in that:
It is more than 11% and 20% following bismuth oxide that described second dielectric layer comprises weight ratio.
5. Plasmia indicating panel according to claim 4 is characterized in that:
It is more than 0.1% and the 7% following at least a composition of selecting in molybdenum oxide and tungsten oxide that described second dielectric layer contains weight ratio.
6. Plasmia indicating panel according to claim 1 is characterized in that:
Described first dielectric layer or described second dielectric layer are included at least a composition of selecting in zinc oxide, boron oxide, silica, aluminium oxide, calcium oxide, strontium oxide strontia, manganese oxide, cerium oxide and the barium monoxide.
7. Plasmia indicating panel according to claim 1 is characterized in that:
Described first dielectric layer is thinner than described second dielectric layer.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP289786/2005 | 2005-10-03 | ||
| JP2005289786 | 2005-10-03 | ||
| JP2006205909A JP4089739B2 (en) | 2005-10-03 | 2006-07-28 | Plasma display panel |
| JP205909/2006 | 2006-07-28 | ||
| PCT/JP2006/319180 WO2007040120A1 (en) | 2005-10-03 | 2006-09-27 | Plasma display panel |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910166078 Division CN101651073A (en) | 2005-10-03 | 2006-09-27 | Plasma display panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101111919A CN101111919A (en) | 2008-01-23 |
| CN101111919B true CN101111919B (en) | 2010-09-08 |
Family
ID=39043123
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200680003643.5A Expired - Fee Related CN101111919B (en) | 2005-10-03 | 2006-09-27 | Plasma display panel |
| CN 200910166078 Pending CN101651073A (en) | 2005-10-03 | 2006-09-27 | Plasma display panel |
| CN 200910175863 Pending CN101656185A (en) | 2005-10-03 | 2006-09-27 | Plasma display panel |
| CN 200680003516 Expired - Fee Related CN100583361C (en) | 2005-10-03 | 2006-09-27 | Plasma display panel |
Family Applications After (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910166078 Pending CN101651073A (en) | 2005-10-03 | 2006-09-27 | Plasma display panel |
| CN 200910175863 Pending CN101656185A (en) | 2005-10-03 | 2006-09-27 | Plasma display panel |
| CN 200680003516 Expired - Fee Related CN100583361C (en) | 2005-10-03 | 2006-09-27 | Plasma display panel |
Country Status (2)
| Country | Link |
|---|---|
| JP (2) | JP4382147B2 (en) |
| CN (4) | CN101111919B (en) |
-
2006
- 2006-09-27 CN CN200680003643.5A patent/CN101111919B/en not_active Expired - Fee Related
- 2006-09-27 CN CN 200910166078 patent/CN101651073A/en active Pending
- 2006-09-27 CN CN 200910175863 patent/CN101656185A/en active Pending
- 2006-09-27 CN CN 200680003516 patent/CN100583361C/en not_active Expired - Fee Related
-
2009
- 2009-05-08 JP JP2009113266A patent/JP4382147B2/en not_active Expired - Fee Related
- 2009-05-08 JP JP2009113267A patent/JP4382148B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101111917A (en) | 2008-01-23 |
| CN101656185A (en) | 2010-02-24 |
| CN101651073A (en) | 2010-02-17 |
| JP4382147B2 (en) | 2009-12-09 |
| JP2009170436A (en) | 2009-07-30 |
| JP2009170435A (en) | 2009-07-30 |
| JP4382148B2 (en) | 2009-12-09 |
| CN101111919A (en) | 2008-01-23 |
| CN100583361C (en) | 2010-01-20 |
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