CN1231494A - Cathode ray tube - Google Patents

Cathode ray tube Download PDF

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Publication number
CN1231494A
CN1231494A CN99105623A CN99105623A CN1231494A CN 1231494 A CN1231494 A CN 1231494A CN 99105623 A CN99105623 A CN 99105623A CN 99105623 A CN99105623 A CN 99105623A CN 1231494 A CN1231494 A CN 1231494A
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CN
China
Prior art keywords
color
fluorescent material
filter layer
fluorescence coating
pigment
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.)
Granted
Application number
CN99105623A
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Chinese (zh)
Other versions
CN1147904C (en
Inventor
李准培
朴昌元
崔鸿奎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung SDI Co Ltd
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Samsung Electron Devices Co Ltd
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Filing date
Publication date
Application filed by Samsung Electron Devices Co Ltd filed Critical Samsung Electron Devices Co Ltd
Publication of CN1231494A publication Critical patent/CN1231494A/en
Application granted granted Critical
Publication of CN1147904C publication Critical patent/CN1147904C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • H01J9/20—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
    • 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
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18—Luminescent screens
    • H01J29/30—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines
    • H01J29/32—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines with adjacent dots or lines of different luminescent material, e.g. for colour television
    • 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
    • H01J2329/32—Means associated with discontinuous arrangements of the luminescent material
    • H01J2329/326—Color filters structurally combined with 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)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Abstract

Provided are a cathode-ray tube manufacturing method and a cathode-ray tube manufactured using the method. A cathode-ray tube, having a faceplate with an inner surface irradiated with a cathode ray beam, and having a first color phosphor film, a second color phosphor film, and a third color phosphor film which are formed on the inner surface of the plate, has a first color filter layer formed between the inner surface of the plate and the first color phosphor film, with the second color phosphor film and the third color phosphor film containing phosphors with pigments clinging thereto. Therefore, a protective resin film does not need to be formed during formation of each filter as is necessary if red, green, and blue layers are formed between a panel and the phosphor films, so that the number of manufacturing processes is greatly reduced and that manufacturing processes are simplified. Thus, not only costs are reduced but also the cathode-ray tube excellent in luminance and contrast characteristics can be manufactured.

Description

Cathode ray tube
The present invention relates to a kind of cathode ray tube (CRT), more particularly relate to a kind of method for simplifying and a kind of CRT with enhanced brightness and contrast-response characteristic that makes fluorescence coating, this CRT adopts the fluorescence coating of being made by this method.
Along with social intense industrialization, increased for the needs of CRT as the display that high brightness and high definition can be provided.In order to address that need, illumination intensity that improves electron beam and the reflectivity that reduces exterior light are studied.
According to the color CRT of routine, the black matrix that absorbs exterior light is arranged in according to predetermined interval on the inner surface of panel of color CRT, and fluorescence coating is set between the black matrix, by with electron beam hits, fluorescence coating is launched versicolor light.
Reduce the reflectivity of exterior light and improve the method for contrast and brightness as the reflectivity influence of avoiding fluorescence coating, in U.S. Pat P5476737 and 5179318, disclose in the method for coating pigment on the surface of fluorescent material or between panel and fluorescence coating, form red, green and the method for blue color filter layer.
Yet this method of adhering to micro pigment on the surface of fluorescent material can not be improved contrast and light characteristic significantly, even the manufacturing process of CRT is simple.In addition, the film strength of fluorescent material has reduced in exposure process.
Simultaneously, although the contrast and the light characteristic that strengthen are provided, the method that forms filter layer is very complicated and has increased manufacturing cost.
For addressing the above problem, an object of the present invention is to provide a kind of straightforward procedure that is used to make the fluorescence coating of cathode ray tube (CRT).
Another object of the present invention is that a kind of CRT with enhanced brightness and contrast-response characteristic will be provided, and this CRT adopts the fluorescence coating of being made by above-mentioned straightforward procedure.
For realizing first purpose, a kind of method that is used to make the fluorescence coating of cathode ray tube (CRT) is provided, may further comprise the steps: in order on the inner surface of panel the filter layer solution of the deposit substrate solution and first color, formed structure is carried out drying and exposure subsequently, to form the filter layer of first color; In order on the structure of the formed filter layer that has first color deposit comprise the fluorescent material of first color mixture, formed structure is carried out drying, exposure and development subsequently, to form the fluorescence coating of first color; In order on the structure of the formed fluorescence coating that has first color fluorescent material of second color of deposit coating pigment (Pigmented), formed structure is carried out drying, exposure and development subsequently, to form the fluorescence coating of second color; And in order on the structure of the formed fluorescence coating that has second color fluorescent material of the 3rd color of deposit coating pigment, formed structure is carried out drying, exposure and development, to form the fluorescence coating of the 3rd color.
For realizing second purpose, a kind of cathode ray tube (CRT) is provided, it comprises: the panel with inner surface, cathode-ray shine so far on the inner surface; Fluorescence coating with first, second and the 3rd color that on the inner surface of panel, form, wherein, the filter layer of one first color is formed between the fluorescence coating of the inner surface and first color, and the fluorescence coating of the second and the 3rd color comprises the fluorescent material of the second and the 3rd color that applies pigment respectively.
By the detailed description that the reference accompanying drawing is done a preferred embodiment of the present invention, it is more clear that above-mentioned purpose of the present invention and advantage will become, in the accompanying drawing:
Fig. 1 is the cutaway view of structure that shows the fluorescence coating of cathode ray tube (CRT).
In the method for the fluorescence coating of manufacturing cathode-ray tube according to the present invention (CRT), the fluorescence coating of the first color is formed on the filter layer of established the first color formerly, and the fluorescence coating of the second and the 3rd color is formed by the fluorescent material of coating pigment. The preferred blue color filter layer of the first filter layer.
The reason that blue color filter layer is preferably the filter layer of the first color is: the dominant wavelength that affects contrast is blue wavelength region. Therefore, adopt simultaneously naked (bare) fluorescent material of blue color filter layer and non-cohesive pigment, with so that the light quantity of the reduction of the brightness of the light of fluorescent material emission and the reflection of outside light reaches minimum degree, improved thus contrast. Blue color filter layer preferably has 95% or higher light-transmission coefficient. Owing to use naked fluorescent material at filter layer, in the CRT manufacture process, the agglomeration of fluorescent material significantly weakens when reclaiming (recovery) fluorescent material, thereby has improved widely the organic efficiency of fluorescent material.
The fluorescent material that applies pigment is preferably used in and forms green and red fluorescence coating, and they also provide good balance apparent (appearance) for (nothing) look tone that disappears with inhibitory reflex light.
The fluorescent material of coating pigment preferably has the particle size of 0.1-0.5 μ m, and is more preferably 1 μ m. In addition, the fluorescent material of coating pigment comprises the red fluorescence powder of fine coating red pigment or the green emitting phosphor of thin coating viridine green. Here, red and viridine green is not limited to a kind of specific pigment. But, preferred Fe2O 3Inorganic pigment as red pigment, the inorganic pigment of preferred Co is as viridine green.
The below is with reference to the method for Fig. 1 description according to manufacturing fluorescence coating of the present invention.
The filter layer solution of a kind of substrate (base) solution that is used to form a bottom and first color mixes, and mixture is deposited on the inner surface of panel 11 of CRT.Subsequently, resulting structure is dried, and its predetermined zone is exposed, optionally to form the filter layer 14a of first color in the position of the fluorescence coating that will form first color.
Substrate solution comprise adhesive, the 0.1-2.5wt% of 0.1-5wt (weight) % sensitising agent, 0.1-1.0wt% surfactant and as the solvent of surplus, these percentage compositions are according to the total weight metering of substrate solution.The filter layer solution of first color comprise adhesive, the 0.1-4.5wt% of pigment, the 0.1-5wt% of 50-15wt% sensitising agent, 0.1-1.0wt% surfactant and as the solvent of surplus, these percentage compositions are filter layer solution (the total weight) meterings according to first color.Here, polyvinyl alcohol is as adhesive, and bichromate is as sensitising agent, and pure water is as solvent.
Subsequently, the fluorescent material of first color is deposited on the structure of the resulting filter layer 14a that has first color, and after this is dried.In addition, dried structure is exposed and develops, thereby forms the fluorescence coating 13a of first color.In Fig. 1, reference number 12 expression black matrix.
Then, the fluorescent material of second color that has the pigment of second color is deposited on the fluorescence coating 13a of first color, and after this is dried.In addition, resulting structure is exposed and develops subsequently, thereby forms the fluorescence coating 13b of second color.
The fluorescent material of the 3rd color that has the pigment of the 3rd color is deposited on the structure of the resulting fluorescence coating 13b that has second color, and is dried.Subsequently, dry structure is exposed and develops, thereby forms the fluorescence coating 13c of the 3rd color.
Preferably blue (B) filter layer of the filter layer of first color, it can more effectively prevent the reduction of reflectivity and brightness than green and red filter layer.Have the fluorescent material of second color of pigment of second color and the fluorescent material of the 3rd color that has the pigment of the 3rd color and preferably have green and redness, they are inhibitory reflex light and proofread and correct apparent well.
Example 1
As cobalt (Co) indigo plant, Pluronic L-92 (BASF AG), the sodium dichromate and mixed of blue pigment, with preparation blue color filter layer solution as the polyvinyl alcohol of adhesive.
Blue color filter layer solution is deposited on the inner surface of panel of CRT and is dried subsequently.After this, the presumptive area of formed structure is exposed, thereby forms blue color filter layer.
Subsequently, as the ZnS of blue colour fluorescent powder: Ag, Al are deposited on the formed structure, and drying, exposure and development subsequently and form blue fluorescent body.
After this, as the Y that applies the painted red fluorescence powder of pigment scarlet 2O 2(red pigment of wherein adhering to is Fe to S: Eu 2O 3Inorganic pigment (Dainichi seika, particle size: 0.25 μ m)) be deposited on the blue fluorescent body and drying, exposure and development and form the red fluorescence layer.
Then, be used as the ZnS of the green emitting phosphor of dark green pigment coloring: Cu, (viridine green that wherein adheres to is that Green (green) 3320 (Dainichi seika, particle size: 0.2 μ m)) is deposited on the blue fluorescent body to Al, and drying, exposure and development and form the green fluorescence layer
Comparative example 1
Y as the red fluorescence powder that has thin red pigment 2O 2S: Eu, as the ZnS of green emitting phosphor that has thin viridine green: Cu, Al and the ZnS that is used as blue colour fluorescent powder: Ag, Al is mixed with water, polyvinyl alcohol, sodium dichromate and PES separately, is stirred about 5 hours subsequently, to prepare redness, green and blue colour fluorescent powder slurry.
The green emitting phosphor slurry is deposited on the panel of CRT, and is exposed and develops, thereby forms the green fluorescence layer pattern.
Adopt blue respectively and the alternative green emitting phosphor slurry of red fluorescence powder slurry, repeat above technology, thereby form blue and red fluorescence layer pattern.
Comparative example 2
Form green, blueness and red fluorescence layer by a kind of common method, green, blueness and red filter layer all form in this method.
That is, green filter layer solution is spin coated on the panel of CRT, drying, exposure and development subsequently and form green filter layer.After this, the mixture that comprises green emitting phosphor is spin coated on the formed structure, and drying, exposure and development subsequently and form green micro-filtration light (micro filter) fluorescence coating.Then, on the green fluorescence layer, form a protection resin bed.
Adopt blue color filter layer solution to add blue colour fluorescent powder and red filter layer solution and add red fluorescence powder and substitute green filter layer solution and add green emitting phosphor, repeat above technology, thereby form blue and green micro-filtration optical fluorescence successively.
Comparative example 3
Y as the red fluorescence powder that applies pigment 2O 2S: Eu, as the ZnS of green emitting phosphor of coating pigment: Cu, Al and the ZnS that is used as the blue colour fluorescent powder of coating pigment: Ag, Al respectively carries the thin pigment of about 1 μ m, and they are used to form redness, green and blue fluorescent body according to a kind of commonsense method.
Then, the panel of each CRT of being made by example 1 and comparative example 1-3 is measured, measured brightness, range of color reproduction and contrast-response characteristic and other makes characteristic.Measurement result is presented in the table 1.Here, range of color reproduction is meant the formed zone of color coordinate of adopting colorimeter (MC-100, Minolta company) to measure.
Table 1
Project Example 1 Comparative example 1 Comparative example 2 Comparative example 3
Brightness 117 ?107 ?125-130 ?100
Range of color reproduction 104 ?103 ?105 ?100
Contrast 98 ?97 ?99 ?100
Number of process steps 38 ?34 ?46a/58b ?34
Remarks Forming the red fluorescence layer has any problem Number of process steps significantly increases
Annotate: a represents number of process steps required when filter layer and fluorescence coating are exposed simultaneously, and b represents number of process steps required when filter layer and fluorescence coating are exposed respectively.
As understandable from table 1, compare with 3 with comparative example 1, the CRT with fluorescence coating of example 1 demonstrates good brightness and contrast's characteristic and wide range of color reproduction.
Although brightness and contrast's characteristic of the CRT that makes in comparative example 2 is best, and its range of color reproduction also is the wideest, and comparative example 2 needs a large amount of processing steps, so it makes complicatedly, and manufacturing cost increases.
Yet, in example 1, only increased deposit, drying, exposure and the development step of the blue color filter layer solution of establishing for the preparation blue color filter layer, therefore to compare with comparative example 2, required number of process steps significantly reduces.In addition, in comparative example 2, formed the protection resin bed in order to prevent that each filter layer from immersing in the fluorescent material slurry of different colours, yet this protective layer is optional in the present invention.
As mentioned above; in the method for manufacturing fluorescence coating according to the present invention; the technology that forms the protection resin bed is optional; and compare with the situation that forms red, green and blue color filter layer and to have reduced required number of process steps; whole manufacturing process is simplified, and has reduced manufacturing cost thus.In addition, employing has been strengthened by brightness and contrast's characteristic of the CRT of the fluorescence coating of this method manufacturing.

Claims (8)

1. method that is used to make the fluorescence coating of cathode ray tube (CRT) may further comprise the steps:
In order on the inner surface of panel the filter layer solution of the deposit substrate solution and first color, formed structure is carried out drying and is exposed subsequently, to form the filter layer of first color;
In order on the structure of the formed filter layer that has first color deposit comprise the fluorescent material of first color mixture, formed structure is carried out drying, exposure and is developed subsequently, to form the fluorescence coating of first color;
In order on the structure of the formed fluorescence coating that has first color fluorescent material of second color of deposit coating pigment, formed structure is carried out drying, exposure and is developed subsequently, to form the fluorescence coating of second color; And
In order on the structure of the formed fluorescence coating that has second color fluorescent material of the 3rd color of deposit coating pigment, formed structure is carried out drying, exposure and development, to form the fluorescence coating of the 3rd color.
2. according to the process of claim 1 wherein, the filter layer of first color is a blue color filter layer, and second color of coating pigment and the fluorescent material of the 3rd color are respectively red and green fluorescent material.
3. according to the process of claim 1 wherein, the fluorescent material of first color is naked fluorescent material.
4. according to the process of claim 1 wherein, the pigment that is attached to the fluorescent material of the second and the 3rd color has the diameter of 0.1-0.5 μ m.
5. cathode ray tube (CRT), it comprises:
Panel with inner surface, cathode-ray shine so far on the inner surface; With
The fluorescence coating of first, second that on the inner surface of panel, forms and the 3rd color,
Wherein, the filter layer of one first color is formed between the fluorescence coating of the inner surface and first color, and the fluorescence coating of the second and the 3rd color comprises the fluorescent material of the second and the 3rd color that applies pigment respectively.
6. according to the cathode ray tube of claim 5, wherein, filter layer is a blue color filter layer, and the fluorescent material of the second and the 3rd color of coating pigment is respectively red and green fluorescent material.
7. according to the cathode ray tube of claim 5, wherein, the pigment that is attached to the fluorescent material of the second and the 3rd color has the diameter of 0.1-0.5 μ m.
8. according to the cathode ray tube of claim 5, wherein, the fluorescence coating of first color comprises naked fluorescent material.
CNB99105623XA 1998-03-12 1999-03-12 Cathode ray tube Expired - Fee Related CN1147904C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR8360/98 1998-03-12
KR1019980008360A KR100263855B1 (en) 1998-03-12 1998-03-12 A manufacturing method of phosphor of crt and a crt having a paste plate with phosphor formed according to the aforementioned method
KR8360/1998 1998-03-12

Publications (2)

Publication Number Publication Date
CN1231494A true CN1231494A (en) 1999-10-13
CN1147904C CN1147904C (en) 2004-04-28

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CNB99105623XA Expired - Fee Related CN1147904C (en) 1998-03-12 1999-03-12 Cathode ray tube

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JP (1) JPH11288665A (en)
KR (1) KR100263855B1 (en)
CN (1) CN1147904C (en)
MY (1) MY133132A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020006950A (en) * 2000-07-14 2002-01-26 김순택 A slurry composition for forming blue filter and method of manufacturing fluorescent layer using the same

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MY133132A (en) 2007-10-31
KR19990074643A (en) 1999-10-05
CN1147904C (en) 2004-04-28
KR100263855B1 (en) 2000-08-16
JPH11288665A (en) 1999-10-19

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