CN1005800B - Method of producing phophor screen of colour picture tube - Google Patents
Method of producing phophor screen of colour picture tube Download PDFInfo
- Publication number
- CN1005800B CN1005800B CN85106064.1A CN85106064A CN1005800B CN 1005800 B CN1005800 B CN 1005800B CN 85106064 A CN85106064 A CN 85106064A CN 1005800 B CN1005800 B CN 1005800B
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- laser beam
- black base
- screen
- shadow mask
- production method
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- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Abstract
The present invention discloses a method for producing a fluorescent screen of a color picture tube. The method is characterized in that the inner surface of the screen is coated with light absorption material and a shadow mask is used; the surface of a light absorption material thin film is scanned and irradiated through the shadow mask by laser beams so that a part of the light absorption material irradiated by the laser beams is heated and burned to generate a black matrix. According to the method to produce the fluorescent screen, the procedure number of black matrix generation can be reduced and the quality and the yield of the fluorescent screen can be improved.
Description
The present invention relates to a kind of method of producing luminescent screen for colour display tube, more particularly, relate to a kind of method of producing black (light absorption) substrate of trichromoscope, it makes the defective that may only manifest on the phosphor screen seldom, can simplify manufacturing process, and help to lower manufacturing cost.
According to a kind of as method at the bottom of No. 218/1971 manufacturing trichromoscope fast black base disclosed, that be put to put into practice so far of Japanese Patent Application Publication, a kind of light-sensitive material is added on the kinescope panel inner surface, expose by shadow mask, the required figure of back formation develops, and will be added to whole surface as the light absorbing material suspension of graphite one class, handle with the etchant solution that contains hydrogen peroxide, this class aqueous solution of clorox subsequently, the light-sensitive material that is exposed and handles well is expanded and etch.And then light-sensitive material developed and etch, and and light-sensitive material peel off together, to form the black base patterns of forming by the light absorbing material that is not exposed.Afterwards, on the inner surface of panel, form fluorescent film figure green, Lan Hehong with starching method or dusting method, and on the fluorescent film figure of these colors, form one deck acrylic resin film, form a metal backing film in the surface thereon with method of evaporating, toast this panel so that remove organic compound, thereby form the phosphor screen of fast black base die bed from fluorescent film figure and polypropylene resin film.
Yet according to the fluoroscopic conventional method of a kind of like this production, the black base patterns will be by comprising panel cleaning-coating photoresist-by shadow mask exposure-development-coating light absorbing material-tediously long steps such as corrosion.Therefore, when method was with the ultra-fine pitch tube fluorescent screen that forms that development in recent years gets up on adopting, the little defective that develops by above-mentioned steps can be increased to the fluoroscopic quality of deterioration on the whole, and reduces output, makes this method be difficult to satisfy the requirement of producing.
The objective of the invention is to provide a kind of method of producing luminescent screen for colour display tube, it can eliminate difficulty intrinsic in above-mentioned common process, and the step at the bottom of the formation fast black base is simplified, this method also can improve the output of fluoroscopic quality owing to the result of the number that reduces manufacturing step.
Produce the method for luminescent screen for colour display tube according to the present invention that can achieve the above object, a kind of light absorbing material is added on the inner surface of panel, connect airtight a shadow mask on it, with the scanning laser beam of precalculated position as scanning element, film surface by shadow mask irradiates light absorbing material, make irradiated part be heated and burn, to form by at the bottom of the fast black base of not formed by that part of light absorbing material of laser beam irradiation.
Fig. 1,2,3 and 4 is the main sectional views partly of colorful visualization tube face plate, and the step of producing the luminescent screen for colour display tube method is described according to one embodiment of present invention.
Narrate the present invention in more detail below by an embodiment.
Fig. 1 to 4 is sectional views of the main part of kinescope panel, and according to one embodiment of present invention the method for producing luminescent screen for colour display tube is described.At first, as shown in fig. 1, cleaning also, one of drying for example is the inner surface 7 of the colorful visualization tube face plate 1 of 14 inches types.Then, as shown in Figure 2, apply a kind of graphite suspension that contains 4% weight approximately about 0.5 micron equably at the inner surface of panel 1 to thickness with rotary process, and it is dry to form light absorption black material film 2.Then, as shown in Figure 3, aperture size is approximately 90 microns, pitch is approximately the opposite that 021 millimeter shadow mask 3 is placed on light absorbing material film 2.Gd: YAG(gadolinium: yttrium aluminium face garnet) scanning element of lasing light emitter is placed in a certain position above the shadow mask 3, and a position for the light source of green emitted point usefulness will be placed in this position during forming at the thin abdomen figure of fluorescence.Through a correcting lens not shown in Figure 3 when fluorescence membrane figure to be formed (it extensively in order to effectively to expose, so that the light path of electron beam orbit and exposure coincide), the total inner surface of panel 1 in air by a laser beam 4 irradiation scannings.Be heated and burn with the part of the light absorbing material of laser beam irradiation, thereby the diameter dimension that forms as shown in Figure 4 is approximately 75 microns fast black base bottom outlet 5.In this case, the output of laser beam 4 is about 200 watts, and its diameter is about 85 microns, and sweep speed is about 70 meter per seconds, and the fluctuating of output is ± 1%.The lasing light emitter scanning element is guided to the position of blue emission point-source of light, guide to the position of red emission point-source of light then, multiple scanning under identical condition, thus form fast black base bottom outlet 5 in the position of three kinds of colors of need configuration.In this case, formed light absorption film 6, it is made up of the remaining part of the light absorbing material film 2 that is not shone by laser beam 4.Afterwards, the fluorescence membrane that 5 li formation of fast black base bottom outlet on the inner surface of panel 1 are made up of the fluorescent grain of green, indigo plant and red color with well-known starching method or coating process then forms the black base patterns of being made up of light absorption film 6 on the inner surface of panel 1.As known, form one deck acrylic resin film and one deck deposited metal film again, thereby finish luminescent screen for colour display tube in addition.
The color picture tube that forms according to the method for the embodiment of the invention, with with the embodiment of the invention though the same structure is arranged, but black base patterns is wherein compared by the color picture tube that traditional photoresist agent method forms, aspect the defective on phosphor screen and the white uniformity, its fine or not level is all to be by determining corresponding to the consistent degree between the position of the position of the fast black base bottom outlet of the fluorophor of three kinds of colors and each color fluorophor.The result represents with following form.
Table
To obviously find out by last table, the method according to this invention, because the step that forms at the bottom of the fast black base is simplified greatly, and the number of step also reduces, thereby obtained on phosphor screen, having less defective, the white uniformity (matter of its relative evaluation colour is put, and its grade reduces with numeral and increases) and the color picture tube that has improved q﹠r have been increased.
The foregoing description has related to uses Gd: the film of YAG laser beam heats and burning light absorbing material.Yet the present invention will never only limit the use of in above-mentioned situation, even adopt carbon dioxide laser beam or other laser beam, also can put into practice by the same manner.
In addition, the foregoing description also relates to formation at the bottom of the fast black base and makes the phosphor screen that can form dot pattern.Yet even in the time will forming strip black base patterns, the present invention also can put into practice by the same manner.In this case,, scanned with laser beam, so that obtain at the bottom of the accurate fast black base of strip width height at the length direction of shadow mask slot in some steps of production method of the present invention.
Moreover in the above-described embodiments, the present invention is applicable to the color picture tube of 14 inches types.But the present invention also is applicable to fluoroscopic other picture tube of figure certainly.
According to the method for above-mentioned production luminescent screen for colour display tube of the present invention, at the bottom of the fast black base with laser beam through shadow mask irradiation and forms, so simplified step at the bottom of the formation fast black base, and the number of minimizing step.Thereby the defects count that is generated in each step is little, and when keeping the output increase, can obtain high-quality color picture tube.
Claims (5)
1, a kind of have a fluoroscopic production method that is formed on the color picture tube on the panel inner surface at the bottom of the fast black base, it is characterized in that, may further comprise the steps: light absorbing material is coated on the inner surface of said panel; One shadow mask is provided; With the scanning element of precalculated position as laser beam, by said shadow mask, with the film of laser beam flying and the said light absorbing material of irradiation,, thereby form at the bottom of the fast black base so that the said film portion of the said light absorbing material of crossing with laser beam irradiation is heated and burns.
2, according to the production method of the luminescent screen for colour display tube of claim 1, it is characterized in that said laser beam is a kind of YAG laser beam.
3, according to the production method of the luminescent screen for colour display tube of claim 1, it is characterized in that, the step that also comprises is: after the step at the bottom of forming said fast black base is finished, in the hole at the bottom of the said fast black base, form the step of the fluorescence membrane of being made up of the fluorescent grain of required colour.
4, according to the production method of the luminescent screen for colour display tube of claim 1, it is characterized in that between said scanning element and said shadow mask, one correcting lens being arranged.
5, according to the production method of the luminescent screen for colour display tube of claim 3, it is characterized in that said scanning element should be when the fluorescence membrane figure will form, the position that the light source of exposure usefulness should be placed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85106064.1A CN1005800B (en) | 1985-08-08 | 1985-08-08 | Method of producing phophor screen of colour picture tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85106064.1A CN1005800B (en) | 1985-08-08 | 1985-08-08 | Method of producing phophor screen of colour picture tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85106064A CN85106064A (en) | 1987-03-04 |
| CN1005800B true CN1005800B (en) | 1989-11-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85106064.1A Expired CN1005800B (en) | 1985-08-08 | 1985-08-08 | Method of producing phophor screen of colour picture tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1005800B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104880848A (en) | 2015-05-06 | 2015-09-02 | 武汉华星光电技术有限公司 | Color filter and manufacturing method thereof, and liquid crystal display panel |
-
1985
- 1985-08-08 CN CN85106064.1A patent/CN1005800B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85106064A (en) | 1987-03-04 |
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