CN1074853C - Method for manufacturing of color cathod-ray tube - Google Patents
Method for manufacturing of color cathod-ray tube Download PDFInfo
- Publication number
- CN1074853C CN1074853C CN96105935A CN96105935A CN1074853C CN 1074853 C CN1074853 C CN 1074853C CN 96105935 A CN96105935 A CN 96105935A CN 96105935 A CN96105935 A CN 96105935A CN 1074853 C CN1074853 C CN 1074853C
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- CN
- China
- Prior art keywords
- coating
- composition
- pigment
- ray tube
- polyvinyl alcohol
- 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.)
- Expired - Fee Related
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
- H01J9/22—Applying luminescent coatings
- H01J9/227—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines
- H01J9/2271—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines by photographic processes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/02—Manufacture of electrodes or electrode systems
- H01J9/14—Manufacture of electrodes or electrode systems of non-emitting electrodes
- H01J9/142—Manufacture of electrodes or electrode systems of non-emitting electrodes of shadow-masks for colour television tubes
- H01J9/144—Mask treatment related to the process of dot deposition during manufacture of luminescent screen
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2329/00—Electron emission display panels, e.g. field emission display panels
- H01J2329/18—Luminescent screens
- H01J2329/20—Luminescent screens characterised by the luminescent material
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a method for manufacturing of color cathod-ray tube, comprising a method for forming dye light filter between the inner surface of flat and fluorescent layer. The method for forming the said light filter comprises the following steps: a first combination of fitering dye, surfactant and water being coated on the inner surface of flat; a second combination of sodium dichromate dihydrate, polyvinyl alcohol, tetraglycol and water being coated on the coating layer of the first combination and dried; performing exposure and development combined with negative mask.
Description
The present invention relates to make the method for color cathode ray tube, particularly the pigment filter coating that forms between screen inner surface and fluorescence coating of utilization prevents colour mixture and prevents method by the white balance deterioration due to the colour mixture of filter coating.
So far, as the technology of preparation color cathode ray tube, coating consists essentially of particulate pigment, emulsion on the inner surface of screen dish, the suspension of light transmitting particles and surfactant, and to the exposure of this screen dish between the inner surface of screen dish and fluorescence coating, to form the pigment filter coating.One-tenth at this used above-mentioned suspension is respectively in the following table 1 and table 2.
Table one
| Component | Content (weight ratio) |
| Viridine green (Ti-Ni-Co-Zn) | 5.0％ |
| Silicon dioxide microparticle | 5.0％ |
| Polyvinyl alcohol (PVA-SBQ) | 3.0％ |
| Ammonium dichromate (ADC) | 0.2％ |
| Surfactant | 0.1％ |
| Pure water | 81.7％ |
Table two
| Component | Content (weight ratio) |
| Blue look pigment (CoO, nAl 2O 3) | 5.0％ |
| Silicon dioxide microparticle | 5.0％ |
| Polyvinyl alcohol (PVA-SBQ) | 3.0％ |
| Ammonium dichromate (ADC) | 0.2％ |
| Surfactant | 0.1％ |
| Pure water | 81.7％ |
According to the conventional method of above-mentioned manufacturing color cathode ray tube, use the composition of the silicon dioxide microparticle of printing opacity as above-mentioned suspension, can improve the adhesive force between screen inner surface and the pigment and the transmissivity of filter coating.
But, have such problem in the conventional technology:, in the pigment filter coating, occur colour mixture as shown in Figure 1 thus, and such colour mixture has been destroyed white balance owing between screen inner surface and pigment, have stronger adhesive strength.As shown in Figure 1, along with the increase of silicon dioxide microparticle content (weight ratio) in the suspension, the horizontal deterioration of colour mixture.
The purpose of this invention is to provide the method for making color cathode ray tube, this method can prevent that the filter coating residue is retained in other position outside the precalculated position, and can prevent the destruction by the white balance due to the colour mixture of filter coating.
To achieve these goals, the invention provides the method for making color cathode ray tube.This method is included in the method that forms the pigment filter coating between screen inner surface and the fluorescence coating, it is characterized in that in the step that forms said filter coating, comprising the steps: on the inner surface of screen dish, coating is by optical filtering pigment, first kind of composition that surfactant and pure water are formed; On said first kind of composition coating, apply by sodium dichromate two water things, polyvinyl alcohol, second kind of composition that tetrem alkene glycol and pure water are formed also carries out drying; Expose then in conjunction with shadow mask and to develop.
The present invention is directed to a kind of method that the pigment filter coating is made color cathode ray tube that between screen inner surface and fluorescence coating, forms, may further comprise the steps:
First kind of composition that coating is made of optical filtering pigment, surfactant and pure water on the inner surface of screen dish,
Second kind of composition that coating is made of sodium dichromate dihydrate, polyvinyl alcohol, tetraethylene glycol and pure water on the coating of described first kind of composition also is dried, the sodium dichromate dihydrate in said second kind of composition wherein, the total content of polyvinyl alcohol and tetraethylene glycol is the 10-80wt% of the content of first kind of optical filtering pigment in the composition.
Expose in conjunction with shadow mask then and develop.
Fig. 1 is the content (weight %) that shows silicon dioxide microparticle in suspension and the curve of the relation between the colour mixture level, and this curve shows: the color cathode ray tube according to the common process preparation has inferior colour mixture level.
Fig. 2 shows second kind of mixture not comprising pure water with respect to the curve that concerns between the content of first kind of mixture and colour mixture level, and this curve shows: according to the degradation of the color cathode ray tube of the present invention's preparation.
Fig. 3 is the process chart of the filter coating of preparation color cathode ray tube of the present invention.
Referring to Fig. 3, the method that forms the pigment filter coating between the screen dish of color cathode ray tube and fluorescence coating comprises the steps: that (a) applies pre-coating, drying, (b) the 1st kind of mixture of coating color 1 pigment, drying, (c) the 2nd kind of mixture of coating color 1 pigment, drying, (d) in conjunction with shadow mask, exposure and development, (e) fluorescent material of coating color 1, dry then, (f) in conjunction with shadow mask, exposure and development.(g) the 1st kind of mixture of coating color 2 pigment, dry then, (h) the 2nd kind of mixture of coating color 2 pigment, dry then, (i) in conjunction with shadow mask, exposure and development, (j) fluorescent material of coating color 2, dry then, (k) in conjunction with shadow mask, exposure and development, the suspension of (1) coating color 3 pigment, dry then, (m) in conjunction with shadow mask, exposure and development, (n) fluorescent material of coating color 3, dry then and (o) in conjunction with shadow mask, exposure and developing.
According to the foregoing description, pre-coating comprises the polystyrene emulsion as main component, bitter edible plant sulfonic acid polymer and formalin, and pre-coating is used to prevent that pigment particle is retained in other position outside the desirable precalculated position.
But, only utilize pre-coating, often pigment particle is retained in the position of other color outside the desirable precalculated position.According to the technology of above-mentioned formation light filter film, have table 3 by between screen inner surface and fluorescence coating, forming, the granules of pigments of 4 and 5 listed components can thoroughly prevent the situation of face grain particulate attached to other position outside the precalculated position.
Table three (the 1st kind of composition of green filter film)
| Component | Content (weight ratio) |
| Green optical filtering pigment | 12.5％ |
| Surfactant | 0.3％ |
| Pure water | 87.2％ |
Table four (the 1st kind of composition of blue look filter coating)
| Component | Content (weight ratio) |
| Blue look optical filtering pigment | 12.5％ |
| Surfactant | 0.3％ |
| Pure water | 87.2％ |
Table five (the 2nd kind of composition)
| Component | Content (weight ratio) |
| Sodium dichromate dihydrate (5%) | 0.14％ |
| Polyvinyl alcohol (10%) | 1.25％ |
| Tetraethylene glycol | 0.15％ |
| Pure water | 98.46％ |
As mentioned above, at the bottom of being formed with fast black base and on the dry inner surface behind the 1st kind of composition of coating; Coating comprises the sodium dichromate dihydrate on first kind of composition, and second kind of mixture of polyvinyl alcohol and tetraethylene glycol in conjunction with the shadow mask exposure, can prevent pigment particle attached to other position outside the desirable precalculated position then thus fully.
In addition, as shown in Figure 2, preferably selecting the weight ratio of the content of optical filtering pigment in the content of other component except that pure water (being the sodium dichromate dihydrate, polyvinyl alcohol and tetraethylene glycol) in said second kind of composition and the first kind of composition is 10%-80%.
This be because, in exposure technology, second kind of composition is as with the photocrosslinking agent of optical filtering particulate attached to screen inner surface, if the photocrosslinking agent content in second kind of composition is lower than 10wt%.When granules of pigments be exposed and attached to screen inner surface on the time luminous sensitivity become bad, thereby reduced adhesive strength, if and this content surpasses 80wt%, when granules of pigments be exposed and attached to screen inner surface on the time luminous sensitivity just become too strong, like this, produced inferior colour mixture owing to pigment being retained in undesirable position.
As mentioned above, according to the present invention, coating comprises optical filtering pigment on the inner surface of screen dish, the first kind of composition and the coating of surfactant and pure water comprise the sodium dichromate dihydrate, second kind of composition of polyvinyl alcohol and tetraethylene glycol, dry then, in conjunction with utilizing the shadow mask exposure, prevent thus the position of granules of pigments, thereby prevented because the decline of the white balance due to the colour mixture of filter coating attached to non-precalculated position.
Claims (1)
1. one kind forms the method that the pigment filter coating is made color cathode ray tube between screen inner surface and fluorescence coating, may further comprise the steps:
First kind of composition that coating is made of optical filtering pigment, surfactant and pure water on the inner surface of screen dish,
Second kind of composition that coating is made of sodium dichromate dihydrate, polyvinyl alcohol, tetraethylene glycol and pure water on the coating of described first kind of composition also is dried, the sodium dichromate dihydrate in said second kind of composition wherein, the total content of polyvinyl alcohol and tetraethylene glycol is the 10-80wt% of the content of first kind of optical filtering pigment in the composition
Expose in conjunction with shadow mask then and develop.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950003221A KR0143854B1 (en) | 1995-02-20 | 1995-02-20 | Method of Forming Fluorescent Surface of Color Cathode Ray Tube |
| KR3221/95 | 1995-02-20 | ||
| KR3221/1995 | 1995-02-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1142678A CN1142678A (en) | 1997-02-12 |
| CN1074853C true CN1074853C (en) | 2001-11-14 |
Family
ID=19408427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96105935A Expired - Fee Related CN1074853C (en) | 1995-02-20 | 1996-02-17 | Method for manufacturing of color cathod-ray tube |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR0143854B1 (en) |
| CN (1) | CN1074853C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100467676B1 (en) * | 1998-11-20 | 2005-06-08 | 삼성에스디아이 주식회사 | Cathode ray tube color filter dispersion and color filter formation method using the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6295683A (en) * | 1985-10-22 | 1987-05-02 | Minolta Camera Co Ltd | Bar code reader |
-
1995
- 1995-02-20 KR KR1019950003221A patent/KR0143854B1/en not_active IP Right Cessation
-
1996
- 1996-02-17 CN CN96105935A patent/CN1074853C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6295683A (en) * | 1985-10-22 | 1987-05-02 | Minolta Camera Co Ltd | Bar code reader |
Also Published As
| Publication number | Publication date |
|---|---|
| KR960032559A (en) | 1996-09-17 |
| CN1142678A (en) | 1997-02-12 |
| KR0143854B1 (en) | 1998-07-01 |
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| CF01 | Termination of patent right due to non-payment of annual fee |