CN100527312C - Method for improving gas discharge efficiency of plasma display board - Google Patents
Method for improving gas discharge efficiency of plasma display board Download PDFInfo
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- CN100527312C CN100527312C CNB2007100216468A CN200710021646A CN100527312C CN 100527312 C CN100527312 C CN 100527312C CN B2007100216468 A CNB2007100216468 A CN B2007100216468A CN 200710021646 A CN200710021646 A CN 200710021646A CN 100527312 C CN100527312 C CN 100527312C
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- powder
- gas discharge
- plasma display
- discharge efficiency
- pdp
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Abstract
The invention provides a method for improving the gas discharge efficiency of the plasma display panel PDP which relates to the application of a low work function material capable of improving the gas discharge efficiency of the PDP. The method is to deposit a low work function material layer, as dielectric protection layer with thickness of 0.01 to 10 mum m, on the MgO protection layer of the dielectric layer of upper and lower substrate of PDP unit, i.e. Ca14Al18O64, C12A7 for short. Because the C12A7 material has only 0.6 eV of the work function, and has high conductivity, then it can greatly depress the discharge voltage and maintaining voltage of the PDP so as to improve the lumination efficient. The C12A7 material is deposited on the MgO protection layer in powder form by employing the method of screen printing or sputtering. The C12A7 material can be the mixture of C12A7 powder and magnesium oxide powder or calcium oxide power or strontium oxide powder or barium oxide powder.
Description
Technical field
The present invention relates to the low-work-function material of a kind of PDP of raising (plasma display panel) gas discharge efficiency, belong to the technical field of display device made.
Background technology
Determine by many factors at plasma display panel (PDP) medium barrier discharging efficiency, the wherein size of the electric field strength in the discharge cell, discharge cell, the air pressure in the discharge cell, gas componant and proportioning, and dielectric layer is of paramount importance factor
[1]Improvement to dielectric layer concentrates on secondary electron yield and the light radiation aspect that raising is coated on the MgO protective layer on the dielectric layer always.The work function of dielectric layer does not also obtain to pay attention to so far.Carbon nanotube (CNT) is reported can improve catching fire and keeping voltage of PDP
[2]The effect of carbon nanotube is not the work function that reduces dielectric layer, but the electric field strength of raising charcoal tip end is to excite field emission.Because carbon nanotube is very sensitive to ion bombardment, the life-span of the method for this raising discharging efficiency can not be satisfactory.A kind of low-work-function material [Ca involved in the present invention
24Al
28O
64]
4+(4e
-), not only have low work function but also have high conductivity.Therefore, adopt low-work-function material involved in the present invention can reduce the firing voltage of PDP greatly and keep voltage, improve luminous efficiency.This material can be at an easy rate by chemical reaction by (CaO)
12(Al
2O
3)
7When higher temperature, obtain
[3-4]This material is stable in air, and can grind to form the distribution of particles of any size easily
[5]
List of references:
1.J.P.Boeuf，“Plasma?display?panels：physics，recent?developmentsand?key?issues”，J.Phys.D：Appl.Phys.36，R53(2003).
2.Y.S.Kim?et?al.，“Effect?of?Carbon?Nanotubes?on?Luminance?of?ACPlasma?Display?Panels”，IDW’03，877(2003).
3.S.Matsuishi?et?al.，“High-Density?Electron?Anions?in?a?NanoporousSingle?crystal：[Ca24Al28064]4+(4e-)”，Science?301，626(2003).
4.Y.Toda?et?al.，“Field?Emission?of?Electron?Anions?Clathrated?inSubnanometer-Sized?Cages?in[Ca24Al28064]4+(4e-)”，AdvancedMaterials?16，685(2004).
5.M.Ono-Kuwuhara?et?al.，“Highly?efficient?Field?Emission?fromSpin-Coated?Electride?Powder”，SID’06?Digest，1642(2006).
Summary of the invention
Technical problem: the objective of the invention is to adopt a kind of method that improves gas discharge efficiency of plasma display board, the existing relatively plasma display panel of plasma display panel with this method is made has higher luminous efficiency.
Technical scheme: in order to reduce catching fire and keeping voltage of PDP, the present invention's suggestion deposits one deck [Ca again on existing plasma display panel MgO protective layer
24Al
28O
64]
4+(4e
-) material (hereinafter to be referred as the C12A7 material); This material work function only is 0.6eV, and C12A7 has high conductivity, because high electron concentration, 10
21Cm
-3, it also can be known as " electronics salt ".
The method of raising gas discharge efficiency of plasma display board of the present invention is deposition one deck low-work-function material on the MgO protective layer of the dielectric layer of PDP unit upper and lower base plate, i.e. C12A7 material, and as medium protective layer, its thickness is 0.01 μ m～10 μ m.Because C12A7 material work function be 0.6eV only, and has high conductivity, therefore adopt C12A7 can reduce the firing voltage of PDP greatly and keep voltage, the raising luminous efficiency.
Under the C12A7 material adopt the C12A7 powder, be deposited on the MgO protective layer with the method for silk screen printing or sputter.The C12A7 material can be the mixture of C12A7 powder and magnesia powder or calcium oxide powder or strontium oxide strontia powder or barium monoxide powder.
Beneficial effect: " C12A7 " can be at an easy rate by chemical reduction reaction by (CaO)
12(Al
2O
3)
7When higher temperature, obtain." C12A7 " is stable in air, and can grind to form the distribution of particles of any size easily.This makes it be suitable for very much various coating techniques, as silk screen printing, revolve film, immersion coating, sputter.The existing relatively plasma display panel of plasma display panel with this method is made has higher luminous efficiency.
Embodiment
When adopt the C12A7 material in PDP, a kind of layer structure clearly is: medium-MgO-C12A7 material.Just the C12A7 bisque is produced on the MgO layer above.Yet,, therefore can only use very thin one deck because the C12A7 material is a black when being reduced fully.The C12A7 bisque can be heated to 400 ° of C, in nitrogen, add thermally-stabilised can be higher in case the degeneration that oxidation and water vapour cause.Because oxidation easily at high temperature, the screen of dielectric layer employing C12A7 coating need sealing-in in nitrogen or other inert gas atmosphere.
Particle concentration is an important parameter for field emission, causes low current density thereby too high particle concentration can cause electrostatic screen.
For the application in PDP, the concentration of C12A7 particle also will be a very important parameter.Except the pure C12A7 material of deposition on the MgO layer, also suggestion uses the C12A7 powder to mix with " MeO " here, wherein " Me " expression magnesium (Mg), calcium (Ca), strontium (Sr) or barium (Ba) element.The mixing ratio of C12A7 and " MeO " was between 1: 100 and 50: 50 (weight ratio).When C12A7 has low concentration in " MeO ", be easy to guarantee to obtain high transparent dielectric structure.C12A7 and " MeO " mixed layer can directly be produced on the hosqt media layer.
Claims (3)
1. method that improves gas discharge efficiency of plasma display board is characterized in that this ten thousand method is deposition one deck low-work-function material, i.e. [Ca on the MgO protective layer of the dielectric layer of the upper and lower substrate in PDP unit
24Al
28O
64]
4+(4e
-) material, as medium protective layer, its thickness is 0.01 μ m～10 μ m.
2. the method for raising gas discharge efficiency of plasma display board according to claim 1 is characterized in that [Ca
24Al
28O
64]
4+(4e
-) material employing [Ca
24Al
28O
64]
4+(4e
-) powder, be deposited on the MgO protective layer with the method for silk screen printing or sputter.
3. method that improves gas discharge efficiency of plasma display board is characterized in that this method is deposition one deck low-work-function material on the MgO protective layer of the dielectric layer of the upper and lower substrate in PDP unit, and this material is [Ca
24Al
28O
64]
4+(4e
-) mixture of powder and magnesia powder, calcium oxide powder, strontium oxide strontia powder or barium monoxide powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100216468A CN100527312C (en) | 2007-04-20 | 2007-04-20 | Method for improving gas discharge efficiency of plasma display board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100216468A CN100527312C (en) | 2007-04-20 | 2007-04-20 | Method for improving gas discharge efficiency of plasma display board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101038846A CN101038846A (en) | 2007-09-19 |
| CN100527312C true CN100527312C (en) | 2009-08-12 |
Family
ID=38889656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100216468A Expired - Fee Related CN100527312C (en) | 2007-04-20 | 2007-04-20 | Method for improving gas discharge efficiency of plasma display board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100527312C (en) |
-
2007
- 2007-04-20 CN CNB2007100216468A patent/CN100527312C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101038846A (en) | 2007-09-19 |
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Granted publication date: 20090812 Termination date: 20120420 |