CN1050466A - Technology at the inner surface of cathode ray tube coating phosphor slurry - Google Patents
Technology at the inner surface of cathode ray tube coating phosphor slurry Download PDFInfo
- Publication number
- CN1050466A CN1050466A CN90107958A CN90107958A CN1050466A CN 1050466 A CN1050466 A CN 1050466A CN 90107958 A CN90107958 A CN 90107958A CN 90107958 A CN90107958 A CN 90107958A CN 1050466 A CN1050466 A CN 1050466A
- Authority
- CN
- China
- Prior art keywords
- panel
- phosphor slurry
- technology
- distance
- ray tube
- 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
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
-
- 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
- H01J9/221—Applying luminescent coatings in continuous layers
- H01J9/223—Applying luminescent coatings in continuous layers by uniformly dispersing of liquid
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
Abstract
The invention discloses a kind of on the cathode ray tube screen inner surface technology of coating phosphor slurry.This technology is panel by a support clamping, simultaneously with predetermined angle swinging, make panel reciprocating with respect to the nozzle that is spraying phosphor slurry in preset distance, described panel is reciprocating motion in described preset distance by this way preferably, preset distance promptly moves ahead, retreat a segment distance that is shorter than the distance that moves ahead then, thereby evenly apply fluoroscopic whole surface.
Description
The present invention relates to a kind of improvement technology at face-plate of a cathode-ray tube inner surface coating phosphor slurry.
Usually, the technology of making cathode ray tube screen comprises following operation: phosphor slurry is coated to the inner bottom surface of panel, forms overlay; Overlay is carried out drying, form untreated fluorescence coating; With the fluorescence coating exposure, make it be point-like or strip; To develop through the fluorescence coating of exposure, to obtain desired fluorescence coating.
United States Patent (USP) 4,035,524 have illustrated the conventional method that phosphor slurry is added to panel inner surface in more detail.For example, as shown in Figure 1, panel 10 by head 21 clampings of support 20, and support 20 itself then designs to such an extent that it is rotated around its axis X by predetermined angle incline-X, thereby phosphor slurry 12 is added on the inner bottom surface of the panel 10 that rotates by desired speed.In said method,, then just can on the total inner surface of panel, form uniform phosphor slurry overlay within a short period of time if phosphor slurry 12 is added on the inner surface of the panel 10 of pivot axis.
Recently, patent gazette 83-2602 in South Korea discloses a kind of method of coating phosphor slurry on the panel that improves to some extent than above-mentioned prior art.Disclosure of the Invention in the above-mentioned communique a kind of on the panel technology of coating phosphor slurry stream, this technology is that seasonal panel slowly runs on the panel inner surface in that phosphor slurry is coated onto, and then makes the panel high speed rotating in the scheduled time after the phosphor slurry coat operations finishes.
The phosphor slurry overlay that draws in this way is than more even with general phosphor slurry coating process.
Yet this method is not enough to produce a kind of cathode ray tube to satisfy the consumer to improving the requirement of high quality image.In addition, in the method, the coating region of phosphor slurry is too wide really as above-mentioned, so that can not obtain required uniform thickness on relatively large cathode ray tube.
In more detail, according to the above-mentioned conventional method that is coated with phosphor slurry, because the panel that scribbles phosphor slurry only low speed or high speed rotating in one direction, thereby overlay may become inhomogeneous because of fluorescent material flows on any one direction.In addition, for making the phosphor screen of large-scale cathode-ray tube, panel needs longer rotation time certainly, so the overlay on the panel inner surface surrounding zone is just than the coating bed thickness on its center.Especially each the corner district owing to panel is formed with a large amount of phosphor slurries thickly, thereby the overlay on the phosphor screen surrounding zone just may form undesiredly.
The purpose of this invention is to provide a kind of method of coating phosphor slurry on face-plate of a cathode-ray tube inner surface, can form uniform overlay in this way, and improve the uniformity and the smoothness of overlay greatly, thereby improve image quality.
For achieving the above object, the invention provides a kind of like this on the face-plate of a cathode-ray tube inner surface method of coating phosphor slurry, this method is to rotate described panel to such an extent that make the regular or irregularly swing of pivot center of panel.According to method of the present invention, regular or irregularly change and help making phosphor slurry to spread all over the centrifugal force of whole front panel inner surface, change the relative position between nozzle and the panel simultaneously, thereby phosphor slurry is evenly distributed on the total inner surface of panel.
Illustrate in greater detail most preferred embodiment of the present invention referring now to accompanying drawing, help the reader to more clearly understand above-mentioned purpose of the present invention and other advantage like this.In the accompanying drawing:
Fig. 1 is the diagrammatic side view of a phosphor slurry coating device, in order to the conventional method of explanation coating phosphor slurry;
Fig. 2 is the diagrammatic side view of a phosphor slurry coating device, in order to phosphor slurry coating process of the present invention to be described;
Fig. 3 shows with method of the present invention and phosphor slurry is added to and when being coated to panel inner surface, the relative position that panel moves in predetermined distance with respect to nozzle;
Fig. 4 then shows in the another embodiment of the present invention panel with respect to the relative position of nozzle.
Fig. 2 shows the method for coating phosphor slurry of the present invention.Referring to Fig. 2, the panel 10 that is coated with on it with phosphor slurry is being supported by the support 20 that uses in the cathode ray tube manufacturers technology, rotates with support 20 then.Support 20 just rests on the fixed position when arriving the boundary line of coating phosphor slurry on panel, makes its rotation by not shown drive unit then.Be added on the inner surface of panel from the phosphor slurry 12 of nozzle 11 ejections, nozzle 11 is placed in panel 10 tops.As shown in the figure, the inner surface of panel 10 up.When phosphor slurry sprayed from nozzle, panel 10 was along with predetermined rotational speed is pressed in the motion of support 20 heads 21.Meanwhile, the gradient of panel 10 pivot centers changes around axis 22 swings continuously because of support 20.Thereby being limited to the nozzle 11 unlikely inner surfaces that depart from panel 10, the angle θ angle of swing system make panel 10 in preset distance shown in Figure 32 reciprocating motions.
If by said method phosphor slurry is coated onto the inner surface of panel 10, then panel 10 rotates the centrifugal force that is produced and just produces comprehensive variation with the swing of panel 10, thereby makes phosphor slurry spread all over whole front panel effectively.In addition, phosphor slurry concentrates the phenomenon that forms also to reduce because of the existence of comprehensive centrifugal force in each corner of panel.Just become not only evenly but also smooth in the thickness that is formed in overlay on the panel inner surface.
Fig. 4 shows the present invention phosphor slurry is coated to another kind of method on the panel.
Among Fig. 4, panel 10 is to design to such an extent that make it the same with first method moving toward double action in distance 1.But the reciprocating motion of panel 10 is divided into a plurality of segmentations and repeats in distance l, i.e. the panel segment distance l ' that moves ahead, then the slow astern segment distance be shorter than move ahead apart from l ' apart from l ".
That is to say that the angle of oscillation of panel 10 system is limited in the θ angular region, and panel is reciprocating motion like this in the short distance of being divided, makes that panel is not once just to swing the θ angle, but once only swing less than the angle of θ.For the purpose of avoiding complicated and confusion, the state that panel rotates is not shown among Fig. 3 and 4.
In addition, in the distance of being divided, repeat reciprocal movingly, may just have inertia impulsive force and occur, and because backway l by above-mentioned " shortening and owing to the raising of swing speed affacts on the panel.
When phosphor slurry being applied to the inner surface of panel to be applied as stated above, phosphor slurry spreads all over the whole surface of panel by means of the crisscross centrifugal force that is changing.In addition, owing to being added with on the phosphor slurry because of the moving impulse force that produces of the past double action in the limited short distance, inertia force has improved the dissemination efficiency of slurries, and has improved the deposition velocity of phosphor particles in the phosphor slurry.
According to the present invention who speaks of above, can improve the glacing flatness of panel surface, and the phosphor screen layer is evenly formed by the gradient of change pivot center and by on phosphor slurry, applying impulse force.
So just can avoid reducing fluoroscopic image quality, thereby draw the high phosphor screen of brightness because of overlay is in uneven thickness.
Claims (2)
1, a kind of technology that phosphor slurry is coated to the positive ray pipe internal surface, this technology is that the phosphor slurry from nozzle ejection is coated to by one on the panel inner surface that the support clamping of its rotational, it is characterized in that, the axis of support is swung in predetermined angular range, make panel reciprocating with respect to nozzle in predetermined distance, thus regular or irregularly changing and help centrifugal force that phosphor slurry is scattered in the panel total inner surface.
2, technology as claimed in claim 1 is characterized in that, described panel is reciprocating like this, and the preset distance that promptly moves ahead retreats a segment distance that is shorter than the distance that moves ahead then, is repeating the action that moves ahead and retreat again in the same way.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR13544/89 | 1989-09-20 | ||
| KR1019890013544A KR920001340B1 (en) | 1989-09-20 | 1989-09-20 | Method manufacturing a flourescent screen of crt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1050466A true CN1050466A (en) | 1991-04-03 |
| CN1031086C CN1031086C (en) | 1996-02-21 |
Family
ID=19290036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN90107958A Expired - Fee Related CN1031086C (en) | 1989-09-20 | 1990-09-20 | Process for coating phosphor slurry on inner surface of CRT |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR920001340B1 (en) |
| CN (1) | CN1031086C (en) |
| GB (1) | GB2236428B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111085500A (en) * | 2019-12-16 | 2020-05-01 | 鲍立国 | Fluorescent powder spraying equipment with bubble removing function |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2281873A (en) * | 1993-09-15 | 1995-03-22 | Denby Pottery Company Limited | Glazing holloware internally on rotating support which can be tipped to remove excess glaze |
| EP0968511A1 (en) * | 1997-09-29 | 2000-01-05 | Koninklijke Philips Electronics N.V. | Method and apparatus for applying a coating |
| US6103297A (en) * | 1998-01-14 | 2000-08-15 | Matsushita Electronics Corporation | Method of manufacturing cathode-ray tube |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB767554A (en) * | 1954-01-05 | 1957-02-06 | Westinghouse Electric Int Co | Improvements in or relating to cathode ray tubes |
| NL6713664A (en) * | 1967-10-07 | 1969-04-09 | ||
| GB1566113A (en) * | 1976-08-31 | 1980-04-30 | Philips Electronic Associated | Providing a layer on a substrate |
| JPS60207229A (en) * | 1984-03-30 | 1985-10-18 | Toshiba Corp | Formation of phosphor screen of cathode-ray tube |
| GB2225157A (en) * | 1988-10-29 | 1990-05-23 | Samsung Electronic Devices | Cathode ray tube screen manufacture |
-
1989
- 1989-09-20 KR KR1019890013544A patent/KR920001340B1/en not_active IP Right Cessation
-
1990
- 1990-09-20 CN CN90107958A patent/CN1031086C/en not_active Expired - Fee Related
- 1990-09-20 GB GB9020504A patent/GB2236428B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111085500A (en) * | 2019-12-16 | 2020-05-01 | 鲍立国 | Fluorescent powder spraying equipment with bubble removing function |
| CN111085500B (en) * | 2019-12-16 | 2021-04-27 | 赣州中蓝稀土新材料科技有限公司 | Fluorescent powder spraying equipment with bubble removing function |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2236428B (en) | 1994-03-30 |
| KR920001340B1 (en) | 1992-02-10 |
| CN1031086C (en) | 1996-02-21 |
| KR910007042A (en) | 1991-04-30 |
| GB2236428A (en) | 1991-04-03 |
| GB9020504D0 (en) | 1990-10-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| OR01 | Other related matters | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |