EP0044454A1 - Correction filter for exposing fluorescent screens for colour picture tubes and method of manufacturing the same - Google Patents
Correction filter for exposing fluorescent screens for colour picture tubes and method of manufacturing the same Download PDFInfo
- Publication number
- EP0044454A1 EP0044454A1 EP81105216A EP81105216A EP0044454A1 EP 0044454 A1 EP0044454 A1 EP 0044454A1 EP 81105216 A EP81105216 A EP 81105216A EP 81105216 A EP81105216 A EP 81105216A EP 0044454 A1 EP0044454 A1 EP 0044454A1
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- European Patent Office
- Prior art keywords
- transmission
- correction filter
- distribution
- light
- droplets
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- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 230000005540 biological transmission Effects 0.000 claims abstract description 23
- 238000009826 distribution Methods 0.000 claims abstract description 17
- 238000005507 spraying Methods 0.000 claims abstract description 6
- 239000007921 spray Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 2
- 239000004922 lacquer Substances 0.000 claims description 2
- 238000010672 photosynthesis Methods 0.000 claims description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical group [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 6
- 239000003973 paint Substances 0.000 abstract description 4
- 230000003595 spectral effect Effects 0.000 abstract description 3
- 230000035699 permeability Effects 0.000 abstract 1
- 229920000159 gelatin Polymers 0.000 description 4
- 239000008273 gelatin Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 108010010803 Gelatin Proteins 0.000 description 3
- 235000019322 gelatine Nutrition 0.000 description 3
- 235000011852 gelatine desserts Nutrition 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 2
- 101100298222 Caenorhabditis elegans pot-1 gene Proteins 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Images
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
- H01J9/2272—Devices for carrying out the processes, e.g. light houses
- H01J9/2273—Auxiliary lenses and filters
Definitions
- the invention relates to a correction filter with a light-absorbing transmission pattern for generating an exposure intensity distributed over a surface in a predetermined manner in the photochemical production of the screen of a color picture tube.
- the applied continuous phosphor layer is irradiated with UV light through a shadow mask, whereby a chemical reaction starts which leads to the adhesion of the phosphor areas hit by the light to the front glass.
- the exposure is carried out in order to place the phosphor regions where they can be hit by the electrons penetrating through the holes in the shadow mask during operation of the tube additionally through a lens, which simulates the path of the light rays similar to the path of the electron beams.
- a light-attenuating element namely the correction filter, is placed in the beam path, which weakens the light beams depending on the location.
- this correction filter consists of a more or less strong accumulation of graphite particles, which are attached by gelatin in the form of a layer on the lens.
- This graphite gelatin layer leads to the intended weakening of the light passing through it, but also to an undesired change in the spectral distribution of this light.
- the gelatin layer can either be applied to the lens itself or to a special glass plate.
- the invention specifies a method with which these deficiencies are avoided, the applied filter is in particular very easy to grip and easily reproducible.
- a transmission pattern is used as the correction filter, which consists of a distribution of dots of solidified droplets, which are predominantly opaque and applied to a transparent support, the concentration distribution of which on the surface is selected according to the predetermined intensity distribution.
- dots of predominantly opaque material are arranged for the correction filter, as they are e.g. arise from the blow of a paint spray.
- Solidified drops of this type have a diameter of approximately 5-100 ⁇ m. They are randomly distributed in their distance and size. According to the composition, e.g. made of graphite particles with binder and solvent, the solidified drop is mostly opaque in itself.
- the desired transmission of the covering is achieved by a reduced or increased number of precipitation per unit area.
- the size of the solidified drops is expediently chosen to be so small that its projection from the screen-mask combination onto the light source is less than a few percent of the extension of the light source.
- the droplets have different sizes, but on a statistical average they give the desired intensity curve; these droplets of a certain mean size correspond in the arrangement according to the invention in their number per unit area (density) to the desired intensity distribution.
- these droplets of a certain mean size correspond in the arrangement according to the invention in their number per unit area (density) to the desired intensity distribution.
- the desired occupancy density or transmission can be achieved in that the spray jet e.g. Cellular, spiral, etc. is guided over the surface to be applied, the feed rate being changed to a desired change in the transmission.
- the spray jet can also be triggered in pulses, an assigned number of pulses being required for the desired transmission of the point in question, so that the covering takes place gradually and thus in a controllable manner. It is also possible for the application to be carried out while measuring the transmission at the same time, and for the continuous application to be carried out automatically in comparison with mormal or input desired transmission data.
- a light house for exposing color picture tube screens is shown.
- a lamp-shaped light source 2 is located in a lamp pot 1. It is fastened in a holder 3, which contains the voltage supply for the lamp, its cooling and adjustment possibility.
- the light emitted by the lamp passes through a window 4.
- a light-reducing element 6 the correction filter.
- the light falls through the shadow mask 7 onto the luminescent inner surface of the front glass of the color picture tube 8.
- the dependence of the transmission on the wavelength in the radiation spectrum of the light emitted by the light source 2 is particularly disruptive.
- the transmission of four differently strong graphite-gelatin coverings as a function of the wavelength is shown in FIG. 2.
- the measurement results show an increase in transmission with increasing wavelength and a change in the ratio of the four coverings to one another.
- the opaque areas consist of spots of approx. 5 - 100 ⁇ m in diameter, some of which also flow together when the still liquid droplets of the spray mist strike.
- the illustration in FIG. 3 shows an enlarged small area for which a 90% transmission results.
- the density distribution on the surface of the correction filter is variable, which according to the invention can be achieved by spraying e.g. is achieved with a moving spray jet, different spraying times, stencils, stencil sequences and moving stencils.
- Fig. 4 shows that the occupancy density can be changed even within a small area.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Optical Filters (AREA)
Abstract
Zur Herstellung der Bildschirme von Farbbildröhren werden die Leuchtstoffschichten in der Bildwanne im Lichthaus belichtet. Dabei muß über der Schirmfläche der Bildwanne eine vorgegebene Lichtintensitätsverteilung eingehalten werden. Dazu dient das Korrekturfilter mit seinem lichtabsorbierenden Transmissionsmuster. Seine flächenhafte Durchlässigkeitsverteilung wird durch eine entsprechende Verteilung von lichtundurchlässigen Lackpünktchen eingestellt, welche durch Sprühen eines Lacks aufgebracht werden. Das so hergestellte Filter ist griffest, leicht und genau reproduzierbar, beeinflußt die spektrale Intensitätsverteilung des verwendeten Lichtes nicht und vermeidet das Ausbrechen des Randes der Leuchtstoffgebiete.To produce the screens of color picture tubes, the fluorescent layers in the image tub in the light house are exposed. A predetermined light intensity distribution must be maintained over the screen surface of the image pan. The correction filter with its light-absorbing transmission pattern is used for this. Its areal permeability distribution is adjusted by a corresponding distribution of opaque paint spots, which are applied by spraying a paint. The filter produced in this way is easy to grip, easily and precisely reproducible, does not influence the spectral intensity distribution of the light used and prevents the edge of the phosphor regions from breaking out.
Description
Die Erfindung betrifft einen Korrekturfilter mit einem lichtabsorbierenden Transmissionsmuster zur Erzeugung einer über eine Fläche in vorgegebener Weise verteilten Belichtungsintensität bei der fotochemischen Herstellung des Bildschirmes einer Farbbildröhre.The invention relates to a correction filter with a light-absorbing transmission pattern for generating an exposure intensity distributed over a surface in a predetermined manner in the photochemical production of the screen of a color picture tube.
Bei der Herstellung von Farbbildröhren wird die aufgebrachte kontinuierliche Leuchtstoffschicht durch eine Schattenmaske hindurch mit UV-Licht bestrahlt, wobei eine chemische Reaktion in Gang kommt, die zur Haftung der vom Licht getroffenen Leuchtstoffgebiete am Frontglas führt.In the manufacture of color picture tubes, the applied continuous phosphor layer is irradiated with UV light through a shadow mask, whereby a chemical reaction starts which leads to the adhesion of the phosphor areas hit by the light to the front glass.
Um die Leuchtstoffgebiete dort anzubringen, wo sie im Betrieb der Röhre von den durch die Löcher der Schattenmaske dringenden Elektronen getroffen werden können, erfolgt die Belichtung zusätzlich durch eine Linse hindurch, welche den Weg der Lichtstrahlen ähnlich dem Weg der Elektronenstrahlen nachbildet.The exposure is carried out in order to place the phosphor regions where they can be hit by the electrons penetrating through the holes in the shadow mask during operation of the tube additionally through a lens, which simulates the path of the light rays similar to the path of the electron beams.
Um weiterhin Einfluß auf die Breitenverteilung der Leuchtstoffgebiete nehmen zu können, wird in den Strahlengang ein lichtschwächendes Element, nämlich das Korrekturfilter gebracht, welches die Lichtstrahlen in Abhängigkeit vom Ort schwächt.In order to be able to continue to influence the width distribution of the phosphor regions, a light-attenuating element, namely the correction filter, is placed in the beam path, which weakens the light beams depending on the location.
Dieses Korrekturfilter besteht nach dem Stand der Technik aus einer mehr oder weniger starken Ansammlung von Graphit-Teilchen, die durch Gelatine befestigt in Form einer.Schicht auf der Linse aufgebracht sind.According to the prior art, this correction filter consists of a more or less strong accumulation of graphite particles, which are attached by gelatin in the form of a layer on the lens.
Diese Graphit-Gelatineschicht führt zu der beabsichtigten Schwächung des durch sie hindurchtretenden Lichtes, aber auch weiterhin zu einer unerwünschten Änderung der spektralen Verteilung dieses Lichtes.This graphite gelatin layer leads to the intended weakening of the light passing through it, but also to an undesired change in the spectral distribution of this light.
Die Gelatine-Schicht kann entweder auf die Linse selbst oder auf eine spezielle Glasplatte aufgebracht sein.The gelatin layer can either be applied to the lens itself or to a special glass plate.
Bei Belichtung durch ein derartiges Filter ergeben sich auf dem Bildschirm zwar Leuchtstoffgebiete von gewünschter Größe, jedoch von ausgebrochener Berandung. Ferner ist die Schicht des Filters selbst sehr empfindlich und kann durch leichtes Berühren zerstört werden.When exposed through such a filter, phosphor areas of the desired size appear on the screen, but the edges are broken. Furthermore, the layer of the filter itself is very sensitive and can be destroyed by lightly touching it.
Die Erfindung gibt ein Verfahren an, mit dem diese Mängel vermieden werden, der aufgebrachte Filter ist insbesondere sehr griffest und leicht reproduzierbar.The invention specifies a method with which these deficiencies are avoided, the applied filter is in particular very easy to grip and easily reproducible.
Das neue Verfahren sei im Folgenden näher erläutert. Als Korrekturfilter wird nach der Erfindung ein Transmissionsmuster verwendet, das aus einer Verteilung von auf einem transparenten Träger aufgebrachten, vorwiegend lichtundurchlässigen Pünktchen aus erstarrten Tröpfchen besteht, deren Konzentrationsverteilung auf der Fläche entsprechend der vorgegebenen Intensitätsverteilung gewählt ist. Für das Korrekturfilter werden erfindungsgemäß Pünktchen aus vorwiegend lichtundurchlässigem Material angeordnet, wie sie z.B. aus dem Niderschlag eines Lacksprühnebels entstehen. Derartige erstarrte Tropfen haben einen Durchmesser von ca. 5 - 100 µm. Sie sind in ihrem Abstand und ihrer Größe regellos verteilt. Entsprechend der Zusammensetzung, z.B. aus Graphitteilchen mit Bindemittel und Lösungsmittel, ist der erstarrte Tropfen in sich vorwiegend lichtundurchlässig. Die gewünschte Transmission der Bedeckung wird durch eine verringerte oder vergrößerte Anzahl der Niederschläge pro Flächeneinheit erreicht. Die Größe der erstarrten Tropfen wird zweckmäßigerweise so klein gewählt, daß ihre Projektion von der Schirm-Masken-Kombination auf die Lichtquelle kleiner als einige Prozent der Ausdehnung der Lichtquelle beträgt.The new process is explained in more detail below. According to the invention, a transmission pattern is used as the correction filter, which consists of a distribution of dots of solidified droplets, which are predominantly opaque and applied to a transparent support, the concentration distribution of which on the surface is selected according to the predetermined intensity distribution. According to the invention, dots of predominantly opaque material are arranged for the correction filter, as they are e.g. arise from the blow of a paint spray. Solidified drops of this type have a diameter of approximately 5-100 μm. They are randomly distributed in their distance and size. According to the composition, e.g. made of graphite particles with binder and solvent, the solidified drop is mostly opaque in itself. The desired transmission of the covering is achieved by a reduced or increased number of precipitation per unit area. The size of the solidified drops is expediently chosen to be so small that its projection from the screen-mask combination onto the light source is less than a few percent of the extension of the light source.
Die Tröpfchen haben erfindungsgemäß zwar unterschiedliche Größe, im statistischen Mittel ergeben sie jedoch den gewünschten Intensitätsverlauf; diese Tröpfchen einer bestimmten mittleren Größe entsprechen nämlich bei der erfindungsgemäßen Anordnung in ihrer Anzahl pro Flächeneinheit (Dichte) der gewünschten Intensitätsverteilung. In dem zur Diskussion stehenden Transmissionsbereich für ein Korrehturfilter für die Belichtung von Lauchtstoffschirmen für Farbbildröhren beträgt der Abstand der einzelnen Pünktchen ein Vielfaches der Wellenlänge des verwendeten Lichtes. Ein derartiger Filter hat somit keinen Spektralgang. Das für die Belichtung angebotene Licht trifft unverfälscht auf den Leuchtstoffschirm.According to the invention, the droplets have different sizes, but on a statistical average they give the desired intensity curve; these droplets of a certain mean size correspond in the arrangement according to the invention in their number per unit area (density) to the desired intensity distribution. In the transmission range under discussion for a correction door filter for the exposure of fluorescent screens for color picture tubes the distance between the individual dots is a multiple of the wavelength of the light used. Such a filter thus has no spectral response. The light offered for the exposure hits the fluorescent screen in an unadulterated manner.
Die Herstellung eines derartigen Filters erfolgt dem Prinzip nach mit einer Sprühpistole, doch wird der Lack nicht wie bei dem üblichen Lackieren flüssig auf die Unterlage gebracht, wo sich ein flüssiger Film bildet, der mit zunehmendem Auftragen cicker und damit undurchlässiger wird. Es wird vielmehr ein lichtundurchlässig trocknender Lack gewählt, der auf dem Weg nach dem Austritt aus der Sprühpistole sich zu Tröpfchen zusammenfügt welche sich in Form geschlossener Fleckchen niederschlagen.The production of such a filter is principally carried out with a spray gun, but the paint is not applied liquid to the base, as is the case with conventional painting, where a liquid film forms, which becomes thicker and thicker as it is applied. Rather, an opaque drying lacquer is chosen which, on the way out of the spray gun, assembles into droplets which are reflected in the form of closed spots.
Die gewünschte Belegungsdichte bzw. Transmission kann dadurch erreicht werden, daß der Sprühstrahl z.B. zellenförmig, spiralförmig usw. über die aufzubringende Fläche geführt wird, wobei zu einer gewünschten Veränderung der Transmission die Vorschubgeschwindigkeit geändert wird. Es kann auch ein impulsweises Auslösen des Sprühstrahles erfolgen, wobei für die gewünschte Transmission der betreffenden Stelle eine zugeordnete Anzahl von Impulsen erforderlich ist, so daß die Bedeckung schrittweise und somit steuerbar erfolgt. Es ist ferner möglich, daß die Aufbringung unter gleichzeitigem Messen der Transmission erfolgt und die fortlaufende Aufbringung unter Vergleich mit Mormal - oder eingegebenen Soll-Transmissions-Daten automatisch geschieht.The desired occupancy density or transmission can be achieved in that the spray jet e.g. Cellular, spiral, etc. is guided over the surface to be applied, the feed rate being changed to a desired change in the transmission. The spray jet can also be triggered in pulses, an assigned number of pulses being required for the desired transmission of the point in question, so that the covering takes place gradually and thus in a controllable manner. It is also possible for the application to be carried out while measuring the transmission at the same time, and for the continuous application to be carried out automatically in comparison with mormal or input desired transmission data.
Es könnte ferner vorteilhaft sein, den Sprühstrahl durch Abdecken mit Schablonen in der Ausdehnung zu begrenzen, um gasielt kleinere Flachen zu behandeln. Es kann auch ein Verfahren angewendet werden, bei dem der Sprühstrahl großflächig die ganze Unterlage trifft, wobei eine gewünschte Abstufung durch Austausch der Blenden erfolgt und wiederholt gesprüht wird, so daß durch Verwendung von Schablonen und mehrmaliger Ausführung der Besprühung die gewünschte Intensitätsverteilung erzielt wird.It could also be advantageous to limit the spray jet by covering it with stencils in order to treat smaller areas with gas. It can also be a Methods are used in which the spray jet strikes the entire surface over a large area, a desired gradation being achieved by exchanging the diaphragms and spraying repeatedly, so that the desired intensity distribution is achieved by using templates and repeated execution of the spraying.
Zur ergänzenden Erläuterung sei die Erfindung im Folgenden noch an Hand von Figuren und Bildern beschrieben:
- Fig. 1 zeigt die Anordnung zur Belichtung von Farbbildröhrenschirmen, in der das Korrekturfilter als lichtschwächendes Element verwendet wird.
- Fig. 2 zeigt als Diagramm die Transmission von Korrekturfiltern nach den Stand der Technik.
- Fig. 3 ist eine stark vergrößerte Abbildung eines kleinen Bereiches des erfindungsgemäßen Korreltturfilters.
- Fig. 4 wie Abbildung in Fig. 3, jedoch mit unterschiedlicher Lichtschwächung infolge unterschiedlicher Fleckchendichte.
- Fig. 1 shows the arrangement for exposing color picture tube screens, in which the correction filter is used as a light-attenuating element.
- 2 shows a diagram of the transmission of correction filters according to the prior art.
- 3 is a greatly enlarged illustration of a small area of the correlation filter according to the invention.
- Fig. 4 as the illustration in Fig. 3, but with different light attenuation due to different spot density.
In Fig. 1 ist ein Lichthaus zur Belichtung von Farbbildröhrenschirmen dargestellt. In einem Lampentopf 1 befindet sich eine stabförmige Lichtquelle 2. Sie ist in einer Halterung 3 befestigt, die die Spannungszuführung für die Lampe, deren Kühlung und Justiermöglichkeit beinhaltet. Das von der Lampe abgegebene Licht tritt durch ein Fenster 4. Unter, über oder auf der Linse 5 befindet sich ein lichtschwächendes Element 6, das Korrekturfilter. Schließlich fällt das Licht durch die Schattenmaske 7 auf die mit Leuchtstoff belegte Innenfläche des Frontglases der Farbbildröhre 8.In Fig. 1 a light house for exposing color picture tube screens is shown. A lamp-
Bei Korrekturfiltern nach dem Stand der Technik stört insbesondere die Abhängigkeit der Transmission von der Wellenlänge im Strahlungspektrum des von der Lichtquelle 2 ausgesandten Lichtes. Dazu ist in Fig. 2 die Transmission von vier verschieden starken Graphit-Gelatine-Bedeckungen in Abhängigkeit der Wellenlänge wiedergegeben. Die Meßergebnisse zeigen eine Zunahme der Transmission mit zunehmender Wellenlänge und eine Veränderung des Verhältnisses der vier Bedeckungen zueinander.In the case of correction filters according to the prior art, the dependence of the transmission on the wavelength in the radiation spectrum of the light emitted by the
Beim erfindungsgemäßen Korrekturfilter ist diese Wellenlängenabhängigkeit nicht vorhanden, wodurch das Ausbrechen der Berandung vermieden wird. Die lichtundurchlässigen Bereiche bestehen aus Fleckchen von ca. 5 - 100 µm Durchmesser, die beim Auftreffen der noch flüssigen Tröpfchen des Sprühnebels zum Teil auch zusammengeflossen sind. Die Abbildung in Fig. 3 zeigt vergrößert einen kleinen Bereich für den sich eine 90% ige Transmission ergibt.This wavelength dependency is not present in the correction filter according to the invention, as a result of which the edge is not broken out. The opaque areas consist of spots of approx. 5 - 100 µm in diameter, some of which also flow together when the still liquid droplets of the spray mist strike. The illustration in FIG. 3 shows an enlarged small area for which a 90% transmission results.
Die Dichteverteilung ist auf der Fläche der Korrekturfilters veränderlich, was nach der Erfindung durch Besprühen z.B. mit bewegtem Sprühstrahl, unterschiedlicher Sprühdauer, Schablonen, Schablonenfolgen und bewegten Schablonen erreicht wird. Fig. 4 zeigt, daß sich die Belegungsdichte schon innerhalb eines kleinen Gebietes ändern läßt.The density distribution on the surface of the correction filter is variable, which according to the invention can be achieved by spraying e.g. is achieved with a moving spray jet, different spraying times, stencils, stencil sequences and moving stencils. Fig. 4 shows that the occupancy density can be changed even within a small area.
Claims (9)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3027704 | 1980-07-22 | ||
| DE3027704A DE3027704C2 (en) | 1980-07-22 | 1980-07-22 | Process for the production of a correction filter for the exposure of the fluorescent screens of color picture tubes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0044454A1 true EP0044454A1 (en) | 1982-01-27 |
| EP0044454B1 EP0044454B1 (en) | 1984-10-24 |
Family
ID=6107795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP81105216A Expired EP0044454B1 (en) | 1980-07-22 | 1981-07-04 | Correction filter for exposing fluorescent screens for colour picture tubes and method of manufacturing the same |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4374866A (en) |
| EP (1) | EP0044454B1 (en) |
| JP (1) | JPS5753045A (en) |
| DE (2) | DE3027704C2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0107181A2 (en) * | 1982-10-26 | 1984-05-02 | Nokia Graetz Gesellschaft mit beschränkter Haftung | Lighthouse correction filter for a lighthouse for manufacturing fluorescent screens for colour picture tubes |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6551678B1 (en) | 1999-10-09 | 2003-04-22 | Formica Corporation | Deep embossed tile design postformable high pressure decorative laminate and method for producing same |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1762428B1 (en) * | 1968-06-14 | 1970-06-18 | Philips Patentverwaltung | Process for shortening the exposure time in the production of a fluorescent pattern for color picture display tubes |
| DE2210724A1 (en) * | 1971-03-05 | 1972-09-14 | Hitachi Ltd | Exposure device for the manufacture of color picture tubes |
| DE2153905A1 (en) * | 1971-10-29 | 1973-05-03 | Licentia Gmbh | PROCESS FOR PRODUCING A FILTER DIFFERENT IN ITS AREA-RELATED TRANSPARENCY |
| DE2229902B2 (en) * | 1971-06-18 | 1976-09-23 | Matsushita Electronics Corp., Kadoma, Osaka (Japan) | DEVICE FOR MAKING THE LUMINOUS SCREEN OF A COLOR TUBE |
| DE2428502B2 (en) * | 1973-06-13 | 1976-12-09 | Tokyo Shibaura Electric Co., Ltd., Kawasaki, Kanagawa (Japan) | METHOD OF MANUFACTURING A SCREEN DIVIDED IN THE FORM OF A STRIP GRID FOR A COLOR TELEVISION TUBE |
| DE2248643B2 (en) * | 1971-10-14 | 1977-04-21 | N.V. Philips' Gloeilampenfabrieken, Eindhoven (Niederlande) | EXPOSURE DEVICE FOR THE PRODUCTION OF A SCREEN OF A COLOR TELEVISION TUBE |
| DE2528039B2 (en) * | 1975-06-24 | 1977-07-21 | Dr Johannes Heidenhain GmbH, 8225 Traunreut | METHOD FOR MANUFACTURING OPTICAL GRAY WEDGES |
| DE2623714B2 (en) * | 1975-05-27 | 1978-02-02 | Thomson-Csf, Paris | CORRECTION FILTER |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3592112A (en) * | 1969-07-25 | 1971-07-13 | Rca Corp | Photographic printing of cathode-ray tube screen structure |
| US3773541A (en) * | 1970-11-02 | 1973-11-20 | Gte Sylvania Inc | Process for achieving a controlled gradient density coating on a light attenuation medium |
| GB1481979A (en) * | 1973-08-29 | 1977-08-03 | Hitachi Ltd | Light exposure apparatus for manufacturing colour picture tube |
-
1980
- 1980-07-22 DE DE3027704A patent/DE3027704C2/en not_active Expired
-
1981
- 1981-07-04 DE DE8181105216T patent/DE3166818D1/en not_active Expired
- 1981-07-04 EP EP81105216A patent/EP0044454B1/en not_active Expired
- 1981-07-15 US US06/283,327 patent/US4374866A/en not_active Expired - Fee Related
- 1981-07-22 JP JP56115021A patent/JPS5753045A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1762428B1 (en) * | 1968-06-14 | 1970-06-18 | Philips Patentverwaltung | Process for shortening the exposure time in the production of a fluorescent pattern for color picture display tubes |
| DE2210724A1 (en) * | 1971-03-05 | 1972-09-14 | Hitachi Ltd | Exposure device for the manufacture of color picture tubes |
| DE2229902B2 (en) * | 1971-06-18 | 1976-09-23 | Matsushita Electronics Corp., Kadoma, Osaka (Japan) | DEVICE FOR MAKING THE LUMINOUS SCREEN OF A COLOR TUBE |
| DE2248643B2 (en) * | 1971-10-14 | 1977-04-21 | N.V. Philips' Gloeilampenfabrieken, Eindhoven (Niederlande) | EXPOSURE DEVICE FOR THE PRODUCTION OF A SCREEN OF A COLOR TELEVISION TUBE |
| DE2153905A1 (en) * | 1971-10-29 | 1973-05-03 | Licentia Gmbh | PROCESS FOR PRODUCING A FILTER DIFFERENT IN ITS AREA-RELATED TRANSPARENCY |
| DE2428502B2 (en) * | 1973-06-13 | 1976-12-09 | Tokyo Shibaura Electric Co., Ltd., Kawasaki, Kanagawa (Japan) | METHOD OF MANUFACTURING A SCREEN DIVIDED IN THE FORM OF A STRIP GRID FOR A COLOR TELEVISION TUBE |
| DE2623714B2 (en) * | 1975-05-27 | 1978-02-02 | Thomson-Csf, Paris | CORRECTION FILTER |
| DE2528039B2 (en) * | 1975-06-24 | 1977-07-21 | Dr Johannes Heidenhain GmbH, 8225 Traunreut | METHOD FOR MANUFACTURING OPTICAL GRAY WEDGES |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0107181A2 (en) * | 1982-10-26 | 1984-05-02 | Nokia Graetz Gesellschaft mit beschränkter Haftung | Lighthouse correction filter for a lighthouse for manufacturing fluorescent screens for colour picture tubes |
| EP0107181A3 (en) * | 1982-10-26 | 1987-05-06 | International Standard Electric Corporation | Poor loss correction filter for manufacturing fluorescent screens for colour picture tubes |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3027704A1 (en) | 1982-02-11 |
| EP0044454B1 (en) | 1984-10-24 |
| JPS5753045A (en) | 1982-03-29 |
| DE3166818D1 (en) | 1984-11-29 |
| DE3027704C2 (en) | 1984-03-22 |
| US4374866A (en) | 1983-02-22 |
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