CN1079977A - Coating composition and the cathode tube that applies with it - Google Patents
Coating composition and the cathode tube that applies with it Download PDFInfo
- Publication number
- CN1079977A CN1079977A CN93104229A CN93104229A CN1079977A CN 1079977 A CN1079977 A CN 1079977A CN 93104229 A CN93104229 A CN 93104229A CN 93104229 A CN93104229 A CN 93104229A CN 1079977 A CN1079977 A CN 1079977A
- Authority
- CN
- China
- Prior art keywords
- coating
- salt
- metal
- composition
- acetate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/86—Vessels; Containers; Vacuum locks
- H01J29/89—Optical or photographic arrangements structurally combined or co-operating with the vessel
- H01J29/896—Anti-reflection means, e.g. eliminating glare due to ambient light
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/86—Vessels; Containers; Vacuum locks
- H01J29/88—Vessels; Containers; Vacuum locks provided with coatings on the walls thereof; Selection of materials for the coatings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/86—Vessels; Containers; Vacuum locks
- H01J29/867—Means associated with the outside of the vessel for shielding, e.g. magnetic shields
- H01J29/868—Screens covering the input or output face of the vessel, e.g. transparent anti-static coatings, X-ray absorbing layers
Landscapes
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
- Paints Or Removers (AREA)
- Surface Treatment Of Optical Elements (AREA)
Abstract
A kind of coating composition that contains original acid alkyl ester, a kind of conducting material, distilled water and organic solvent is disclosed, and a kind of cathode tube that applies with said composition.This coating composition comprises hydrochloride, nitrate and/or acetate.
Description
The present invention relates to a kind of coating composition and with the cathode tube that its applies, particularly relate to a kind of contain the coating composition of novel metal-salt and relate to that the method that adopts rotation to apply this coating composition makes have good anti--cathode tube of dazzle characteristic.
Usually, owing to use the display screen of slick glass as picture reproducing such as cathode ray tube (CRT), liquid-crystal apparatus developing devices such as (LCD), therefore, literal and figure in the image that reproduces are unclear, this is because external light is shown the screen surfaces reflection, causes being difficult to obtaining image clearly.It is to make a kind of ridge design on such as the sightingpiston of CRT one class developing device that a method that is used for sort this problem out is arranged, and to cause the external light diffuse-reflectance that projects the display screen outside surface, prevents the reflection of light whereby.
The industrial method that is used to make ridge design has hydrofluoric acid etch, sandblasting etc.Yet in etch, hydrofluoric acid will pollute, and is difficult to its rectification when producing substandard products.The problem that produces in the polishing method is that Products Quality is poor, and owing to stay resistates after polishing, therefore makes the per-cent of substandard products higher.Owing to these reasons, above-mentioned anti--application of dazzle facture reduces recently significantly.
Therefore, in order to overcome the problem of following aforesaid method to produce, the someone has proposed a kind of method that is used to make ridge design recently, and this method is earlier at surface-coated one deck soluble silicate of display screen, then by heating coating with silicon-dioxide (SiO
2) layer be bonded on the display screen surface.
The clear 44-11150 of Ri Tekai discloses a kind of by making the method for anti--dazzle coating on the outside surface that " water glass " (potassium silicate) is coated to display screen.Yet, in this method, a kind of light tight coating of white occurring, and therefore cause transparence obviously to descend, this has just limited the practical application of this method.
In addition, the practical new case of Japan is opened clear 50-26277 and is disclosed a kind of silicon tetrachloride (SiCl that passes through hydrolysis
4) spray on the surface of display screen and make a kind of SiO of having
2The method of particulate coating.Yet owing to coating solution is made with strong acid, so it is with etching apparatus.In fact this method can not be used.
In order to overcome the problems referred to above, clear 61-118931 of Ri Tekai and clear 61-29051 have proposed some and have been used to make the method for anti--dazzle coating, the step that this method comprises be earlier with original acid alkyl ester [Si(OR)
4] hydrating solution spray on the surface of display screen, make this solution hardening to produce a kind of SiO being higher than under 80 ℃ the temperature then
2Ridge design.This method is feasible and still uses in reality now.Yet the reflectivity of external light (luminance brightness) is in 40 to 70 scope.Because some characteristic of spraying coating process causes the reflectivity more than 70 to be difficult to regeneration.In addition, coating is very fragile.
In U.S. Pat 4,563, in 612, disclose a kind of handle and be coated to method on the display screen by the composition that mixes original acid alkyl ester and metallic compound and make.Also there is the problem of above-mentioned external light reflectivity in this method.
Simultaneously, Figure 1A and 2A show respectively and are used for composition is coated to a kind of spraying method and a kind of spin coating method (being called clear-coated) on the cathode tube.Figure 1B is an enlarged view by Figure 1A coating that method obtains, and Fig. 2 B is an enlarged view by Fig. 2 A coating that method obtains.Wherein, owing to compare with rotational method, the ridge design (3) on display screen (2) that is produced by spraying method is thicker, and therefore the diffuse effect in the coating that produces with spraying method is preferable.Yet, when applying a kind of coating composition, must regulate the thickness of coating, and because the characteristic of spraying method can't be made fine and close decorative pattern with spraying method.Therefore, be difficult to obtain a kind of coating with external light high-reflectivity.On the other hand, the coating that is made by spin coating method has the high-reflectivity of constant thickness and external light.
Therefore, be adjusted to for reflectivity in the scope of 40-90, need to use spraying method and two kinds of equipment of spin coating method external light.This just makes complex manufacturingization and has increased die manufacturing cost.
Consider those above-mentioned shortcomings, an object of the present invention is to provide a kind of coating composition, said composition can form a kind of coating of the external light reflectivity with wide region and can apply the intensity that the method for making coating improves coating by rotation.
Another object of the present invention provide a kind of use that aforementioned coating composition makes have good antistatic and anti--cathode tube of dazzle characteristic.
In order to finish one object of the present invention, a kind of coating composition that comprises original acid alkyl ester, a kind of conducting material, distilled water and organic solvent is provided, it is characterized in that, said composition also contains at least a metal-salt that is selected from hydrochloride, nitrate and the acetate, is 0.01 to 2%(weight and the content of this metal-salt is the basis with the said composition).
In order to finish another object of the present invention, a kind of cathode tube is provided, on the outside surface of its display screen, have antistatic and anti--dazzle coating that one deck comprises silicon-dioxide and a kind of conducting material.This coating also contains at least a metal-salt that is selected from hydrochloride, nitrate and the acetate, uses spin coating method that said coating composition is coated on the surface of said display screen.Then with the said composition drying.
Preferred metal salt is at least a metal-salt that is selected from following thing group, comprising: Repone K (KCl), sodium-chlor (NaCl), ammonium chloride (NH
4Cl), saltpetre (KNO
3), SODIUMNITRATE (NaNO
3), ammonium nitrate (NH
4NO
3), potassium acetate (CH
3COOK), sodium acetate (CH
3COONa) and ammonium acetate (CH
3COONH
4).
In addition, usually as being used to provide the conducting material of coating specific conductivity to use: tin (Sn) compound, antimony (Sb) compound, platinum (Pt) compound, gold (Au) compound, indium (In) compound or zirconium (Zr) compound.
Describe preferable embodiment of the present invention in detail by the reference accompanying drawing and will make above-mentioned purpose of the present invention and other advantages become clearer, in these accompanying drawings:
Figure 1A and 1B illustrate a kind of spraying method and the enlarged view of the coating that obtains with this method;
Fig. 2 A and 2B illustrate a kind of enlarged view of the coating of rotating coating method and obtaining with this method;
Fig. 3 is a coating method that adopts Figure 1A, the enlarged photograph (400 times) of the coating that the coating composition that use obtains by embodiment 1 makes;
Fig. 4-the 6th adopts the coating method of Fig. 2 A, uses the enlarged photograph (400 times) of the coating that makes by embodiment 1,2 and 3 coating compositions that obtain;
Fig. 7 is a coating method that adopts Fig. 2, in the course of processing, simultaneously the exsiccant air blown on the surface of display screen, and the enlarged photograph (400 times) that uses the coating that the coating composition that obtains by embodiment 1 makes;
Fig. 8 is the sectional view of coating shown in any figure of Fig. 3 to 6;
Fig. 9 is the sectional view of coating shown in Fig. 7;
Figure 10 is the enlarged view of coating shown in any figure of Fig. 4 to 6; And
Figure 11 is the graphic representation that the reflectivity of an expression external light changes along with adding metal-salt in the coating composition of the present invention and quantity.
At first, the slaine that joins in the coating composition of the present invention exists with a kind of state of the aqueous solution. After on the outer surface that composition is coated to display screen, composition heated together and make its drying. Along with water and organic solvent volatilize from the surface of display screen, be dissolved in slaine in the solution and just separate out and become crystalline solid. Isolated slaine produces a kind of ridge design from continuous silicate sturcture. Even composition of the present invention only the method (not adopting spraying method) by adopting rotary coating also can coating form a kind of have good anti--ridge design of glare effect.
Take the total amount of composition as the basis, the addition of slaine is in 0.01-2%(weight) scope in. If the addition of slaine is less than 0.01%(weight), the external light reflectivity of the cathode-ray tube of then making is too high, and if the addition of slaine more than 2%(weight), then the reflectivity of external light is excessively low. The optimal addn of slaine is about 1%(weight).
Coating composition of the present invention is made as follows. At first, tetraethyl orthosilicate, organic solvent, conductive materials and distilled water are mixed together and with about 6 days of this mixture slaking in about 60 ℃ thermostat. Slaine is dissolved in the distilled water, this solution is added in the above-mentioned slaking mixture and with obtaining mixture stirred 2 hours. Mixture is spun and coated on the outer surface of the display screen that rotates with 50-100rpm speed, coating time is 5-20 second. In 80-200 ℃ temperature range, with composition dries 0.5-2 hour that applies, form a kind of coating that is made by coating composition of the present invention.
Preferred embodiment of the present invention will be described in detail belows.
Tetraethyl orthosilicate (TEOS) 3%(weight)
Methyl alcohol 83%(weight)
Distilled water 10%(weight)
Tin chloride (SnCl
4NH
2O) 3%(weight)
Repone K 1%(weight)
All above-claimed cpds except Repone K are mixed and slaking 72 hours in 60 ℃ thermostatic bath.With the 10%(weight/volume) potassium chloride solution add in the mixture of slaking and stirred 2 hours, promptly obtain composition of the present invention.This mixture rotation is coated on the display screen surface of rotating with 150rpm speed, and the coating time is 2 minutes.Then, the display screen that this was applied was 170 ℃ of following roastings 0.5 hour.
Tetraethyl orthosilicate (TEOS) 3%(weight)
Methyl alcohol 83%(weight)
Distilled water 10%(weight)
Tin chloride (SnCl
4NH
2O) 3%(weight)
Herein except replacing with SODIUMNITRATE the Repone K, other all obtain coating composition of the present invention according to the method identical with embodiment 1.This composition is coated on the outside surface of display screen and and makes its drying by heating, so just obtained of the present invention anti--the dazzle cathode tube.
Tetraethyl orthosilicate (TEOS) 3%(weight)
Methyl alcohol 83%(weight)
Distilled water 10%(weight)
Tin chloride (SnCl
4NH
2O) 3%(weight)
Herein except replacing with ammonium acetate the Repone K, other all obtain coating composition of the present invention according to the method identical with embodiment 1.This composition is coated on the outside surface of display screen and and makes its drying by heating, so just obtained of the present invention anti--the dazzle cathode tube.
Fig. 3 is a coating method that adopts Figure 1A, the enlarged photograph (400 times) of the coating that the coating composition that use obtains by embodiment 1 makes.Fig. 4-the 6th adopts the coating method of Fig. 2 A, uses the enlarged photograph (400 times) of the coating that makes by embodiment 1,2 and 3 coating compositions that obtain.From these photos as can be seen, the coating of using the rotation coating method to obtain also has and resembles by obtain dark of spraying method and decorative pattern clearly.
After on the outside surface that coating composition of the present invention is coated to display screen, on display screen, blow hot blast or exsiccant air, or rotary display screen apace, quicken rate of drying whereby, the result is in the coating that is obtained, and metal-salt still is not able to do in time to separate from silicate layer and separates out in silicate layer.
Fig. 7 is a coating method that adopts Fig. 2, in the course of processing, simultaneously the exsiccant air blown on the surface of display screen, and the enlarged photograph (400 times) that uses the coating that the coating composition that obtains by embodiment 1 makes.This photo shows that concavo-convex shape is not dark.
Fig. 8 is the sectional view of coating shown in any figure of Fig. 3 to 6, and Fig. 9 is the sectional view of coating shown in Figure 7.Upper surface at silicate layer 5 is made and separated out to metal-salt 4 in this coating by common spraying method or spin coating method.But if blow the exsiccant air in coating procedure, then the metal-salt in the coating that makes like this 4 just can not fully separate from silicate layer 5 and therefore generate a kind of coating with scrobicula convex form at display screen 2.
Figure 10 is the enlarged view of coating shown in any figure of Fig. 4 to 6, and it shows the reaction principle of coating composition on display screen.In silicate layer, be exposed to airborne metal-salt and absorbed small amount of moisture and the solvent that after dry and roasting process, does not volatilize away from the web-like silicon silicate layer, and with these moisture and solvent evaporates in air, so generate a kind of solid coating.In Figure 10, arrow represent solvent 6 and evaporable solvent 6 ' working direction.
Figure 11 is the graphic representation that the reflectivity of an expression external light changes along with the quantity that adds the metal-salt in the coating composition of the present invention.For this graphic representation, each coating all is that the step by embodiment 1 makes, but the add-on of Repone K (gross weight with coating composition is a benchmark) has nothing in common with each other, and has all measured it to the reflectivity of external light and with these measurement result mappings for each coating.The external light reflectivity is represented by the percentage ratio of glass-reflected that with this light when the input angle of external light was 60 °, then Ci Shi reflectivity was considered to equal 100%, and uses the GM-060 survey meter of being produced by Minolta Co. when measuring.In the figure, along with the increase of metal-salt add-on, reflectivity descends rapidly.Can regulate the reflectivity that utilizes the negative electrode degree x ray tube that coating composition of the present invention makes at an easy rate by the add-on of regulating metal-salt in the coating composition.
As can be seen from this figure, when the add-on of metal-salt in 0.01-2%(weight) scope in the time, the reflectivity of external light changes between 40% to 90%.The add-on of metal-salt is limited in the above-mentioned scope so that be between 40% to 90% by the external light reflectivity of its cathode tube of making.If reflectivity is lower than 40%, then the resolving power of negative electrode degree x ray tube suffers damage, and the quality of picture reproducing is also owing to schillerization suffers damage, and if reflectivity is higher than 90%, then display screen begins to show and the simple glass similar phenomena.The preferred values of reflectivity is in 50% to 60% scope.In addition, if the add-on of metal-salt is a 1%(weight resembling shown in the embodiments of the invention), the reflectivity of cathode tube at this moment is about 55%.That is to say that the reflectivity of external light can be controlled by the method for regulating the metal-salt add-on.
The invention provides a kind of coating composition, said composition can easily be regulated the reflectivity of external light by the add-on that changes metal-salt, a kind ofly have the coating of wide region reflectivity and do not need particular processing but also can generate, also do not need the specific installation that is used to spray by the rotation coating method.When the metal-salt that adds is dried and is separated out, this metal-salt just can absorb a small amount of solvent that is contained in the silicate layer reticulated structure and these solvent evaporations in air, so just generated a cathode tube with solid cladding.And, from fact, required equipment (also therefore making the cost of equipment) is significantly reduced.
Though the present invention has made concrete disclosure and description with reference to preferable embodiment, but those skilled in the art all understand, under situation, can make on the various forms and concrete variation by the spirit and scope of the present invention that claims limited.
Claims (6)
1, a kind of coating composition, contain original acid alkyl ester, a kind of conducting material, distilled water and organic solvent, it is characterized in that, said coating composition also contains at least a metal-salt that is selected from hydrochloride, nitrate and the acetate, and the content of said metal-salt is 0.01-2% (weight) with said composition as benchmark.
2, coating composition as claimed in claim 1 is characterized in that said metal-salt is at least a metal-salt that is selected from following thing group, and this thing group comprises: Repone K (KCl), sodium-chlor (NaCl), ammonium chloride (NH
4Cl), saltpetre (KNO
3), SODIUMNITRATE (NaNO
3), ammonium nitrate (NH
4NO
3), potassium acetate (CH
3COOK), sodium acetate (CH
3COONa) and ammonium acetate (CH
3COONH
4).
3, a kind of cathode tube, on the outside surface of its display screen (2), has the coating that one deck comprises the antistatic and anti--dazzle of silicon-dioxide and a kind of conducting material, it is characterized in that this coating also contains at least a metal-salt (4) that is selected from hydrochloride, nitrate and the acetate.
4, as a kind of cathode tube in the claim 3, it is characterized in that said metal-salt (4) is at least a metal-salt that is selected from following thing group, this thing group comprises: Repone K (KCl), sodium-chlor (NaCl), ammonium chloride (NH
4Cl), saltpetre (KNO
3), SODIUMNITRATE (NaNO
3), ammonium nitrate (NH
4NO
3), potassium acetate (CH
3COOK), sodium acetate (CH
3COONa) and ammonium acetate (CH
3COONH
4).
5, a kind of cathode tube as claimed in claim 3, the reflectivity that it is characterized in that said coating is in the scope of 40-100%.
6, a kind of cathode tube, on the outside surface of its display screen (2), has the coating that one deck comprises the antistatic and anti--dazzle of silicon-dioxide and a kind of conducting material, it is characterized in that, said coating contains the metal-salt (4) that is useful on this coating of preparation, when this coating of preparation, apply operation a kind of containing is selected from hydrochloride by rotation, the coating composition of at least a metal-salt (4) is coated on the outside surface of display screen (2) in nitrate and the acetate, then with the said composition drying, and the content of said metal-salt (4) is 0.01-2%(weight with said composition as the basis).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR9989/92 | 1992-06-09 | ||
| KR1019920009989A KR940001242A (en) | 1992-06-09 | 1992-06-09 | Coating composition for cathode ray tube and cathode ray tube using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1079977A true CN1079977A (en) | 1993-12-29 |
Family
ID=19334431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93104229A Pending CN1079977A (en) | 1992-06-09 | 1993-04-15 | Coating composition and the cathode tube that applies with it |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0574112A1 (en) |
| JP (1) | JP2768396B2 (en) |
| KR (1) | KR940001242A (en) |
| CN (1) | CN1079977A (en) |
| TW (1) | TW225035B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101937821A (en) * | 2010-03-30 | 2011-01-05 | 中山大学 | Fluorescent screen of vacuum equipment and non-adhesive manufacturing method for fluorescent screen |
| CN101939387B (en) * | 2007-12-10 | 2013-01-02 | 汉伯公司 | Alkyl silicate paint compositions with improved cracking resistance |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6001486A (en) * | 1994-07-29 | 1999-12-14 | Donnelly Corporation | Transparent substrate with diffuser surface |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1639202B2 (en) * | 1965-06-15 | 1971-04-29 | SUSPENSION AND PROCESS FOR MANUFACTURING A EASILY DEGASABLE ADHESIVE ELECTRICALLY CONDUCTIVE COATING IN ELECTRIC TUBES | |
| KR910002977B1 (en) * | 1987-04-28 | 1991-05-11 | 가부시기가이샤 도오시바 | Cathode ray tube having anti-charge sheet in front panel |
| JPH01276534A (en) * | 1988-04-28 | 1989-11-07 | Toshiba Corp | Method of forming charge protection film on outer surface of cathode ray tube |
| JPH01319232A (en) * | 1988-06-17 | 1989-12-25 | Mitsubishi Electric Corp | Glare shield-processed cathode-ray tube |
| JP2858821B2 (en) * | 1989-11-08 | 1999-02-17 | 株式会社日立製作所 | Anti-reflection film, its manufacturing method and image display face plate |
| KR930007356B1 (en) * | 1990-03-31 | 1993-08-09 | 삼성전관 주식회사 | Coating compositions |
-
1992
- 1992-06-09 KR KR1019920009989A patent/KR940001242A/en not_active Application Discontinuation
-
1993
- 1993-03-19 TW TW082102056A patent/TW225035B/zh active
- 1993-03-22 EP EP93302158A patent/EP0574112A1/en not_active Withdrawn
- 1993-03-23 JP JP5087917A patent/JP2768396B2/en not_active Expired - Lifetime
- 1993-04-15 CN CN93104229A patent/CN1079977A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101939387B (en) * | 2007-12-10 | 2013-01-02 | 汉伯公司 | Alkyl silicate paint compositions with improved cracking resistance |
| CN101937821A (en) * | 2010-03-30 | 2011-01-05 | 中山大学 | Fluorescent screen of vacuum equipment and non-adhesive manufacturing method for fluorescent screen |
| CN101937821B (en) * | 2010-03-30 | 2012-02-15 | 中山大学 | Fluorescent screen of vacuum equipment and non-adhesive manufacturing method for fluorescent screen |
Also Published As
| Publication number | Publication date |
|---|---|
| TW225035B (en) | 1994-06-11 |
| JP2768396B2 (en) | 1998-06-25 |
| KR940001242A (en) | 1994-01-11 |
| EP0574112A1 (en) | 1993-12-15 |
| JPH06260114A (en) | 1994-09-16 |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |