Patents by Inventor Dieter Wadow
Dieter Wadow has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8057702Abstract: The present invention is directed to a Gd2O2S:M fluorescent ceramic material with a very short afterglow, wherein M represents at least one element selected from the group Pr, Th, Yb, Dy, Sm and/or Ho and the Gd2O2S:M fluorescent ceramic material comprises further: europium of ?1 wt. ppm based on Gd2O2S, and cerium of ?0.1 wt. ppm to ?100 wt. ppm based on Gd2O2S, wherein the content of cerium is in excess of the content of europium with a ratio of europium to cerium of 1:10 to 1:150.Type: GrantFiled: April 13, 2006Date of Patent: November 15, 2011Assignee: Koninklijke Philips Electronics N.V.Inventors: Cornelis Reinder Ronda, Gunter Zeitler, Dieter Wadow, Herfried Wieczorek, Herbert Schreinemachen
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Publication number: 20080179566Abstract: The present invention is directed to a Gd2O2S:M fluorescent ceramic material with a very short afterglow, wherein M represents at least one element selected from the group Pr, Th, Yb, Dy, Sm and/or Ho and the Gd2O2S:M fluorescent ceramic material comprises further: europium of ?1 wt. ppm based on Gd2O2S, and cerium of ?0.1 wt. ppm to ?100 wt. ppm based on Gd2O2S, wherein the content of cerium is in excess of the content of europium with a ratio of europium to cerium of 1:10 to 1:150.Type: ApplicationFiled: April 13, 2006Publication date: July 31, 2008Applicant: KONINKLIJKE PHILIPS ELECTRONICS N. V.Inventors: Cornelis Reinder Ronda, Gunter Zeitler, Dieter Wadow, Herfried Wieczorek, Herbert Schreinemacher
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Patent number: 6013314Abstract: A method of manufacturing a phosphor composition of a phosphor comprising a pigment coating of hematite, includes a first step in which the phosphor is coated with an iron-containing starting compound for hematite, and a second step, in which the phosphor with the coating is calcined, thereby converting the iron-containing starting compound for hematite into hematite. The calcining operation is carried out in an atmosphere of a gas mixture of water vapor and an oxidizing gas.Type: GrantFiled: July 24, 1998Date of Patent: January 11, 2000Assignee: U.S. Philips CorporationInventors: Michael Bredol, Jacqueline Merikhi, Dieter Wadow, Irmgard Kohler
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Patent number: 5798059Abstract: A color display screen having a coating which comprises at least a greend an/or a red phosphor as well as at least a pigment having the following composition:Ga.sub.a In.sub.b Zn.sub.c Al.sub.d O.sub.n S.sub.m Se.sub.o Te.sub.pwherein0.05<a<1.95 0.0.ltoreq.n<0.30.05<b<1.95 2.1<m.ltoreq.30.00.ltoreq.c<0.09 0.0.ltoreq.o<0.30.00.ltoreq.d<0.2 0.0.ltoreq.p<0.3and n+m+o+p=3 and a+b+2/3c+d=2, yields a high-contrast and low-reflection picture, because the pigmentation in accordance with the invention is self-luminescent and its solid-solution properties enable its absorption properties to be accurately adapted to the emission spectrum of the phosphor. The solid solutions having the composition Ga.sub.a In.sub.b Zn.sub.c Al.sub.d O.sub.n S.sub.m Se.sub.o Te.sub.p are characterized by steep absorption edges in the yellow-orange spectral range and by a high absorptivity. This permits thin pigment-containing layers and small quantities of pigment to be used.Type: GrantFiled: December 9, 1996Date of Patent: August 25, 1998Assignee: U.S. Philips CorporationInventors: Michael Bredol, Jacqueline Merikhi, Dieter Wadow
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Patent number: 5744061Abstract: A color display screen comprising a coating which contains at least a green and/or a red phosphor and at least a pigment having the composition Zn.sub.3-3x In.sub.2xy Ga.sub.2x-2xy S.sub.3, wherein 0.2<x<0.97 and 0.1<y.ltoreq.1.0, yields a high-contrast and low-reflection picture, because the solid-solution properties of the pigmentation in accordance with the invention enable its absorption properties to be accurately adapted to the emission spectrum of the phosphor. The solid solutions having the above-mentioned composition are characterized by steep absorption edges in the yellow-orange spectral range and by a high absorptivity. This permits thin pigment-containing layers and small quantities of pigment to be used.Type: GrantFiled: December 9, 1996Date of Patent: April 28, 1998Assignee: U.S. Philips CorporationInventors: Michael Bredol, Jacqueline Merikhi, Dieter Wadow
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Patent number: 5684358Abstract: The invention relates to a display screen comprising a phosphor composition of a sulphide and/or selenide-containing phosphor which is provided with a coating which is composed of germanium disulphide and/or germanium diselenide. In such a display screen, in particular a low-energy cathode ray display screen, the advantages of the efficient sulphide or selenide-containing phosphors can be used and said display screen remains bright and rich in contrast for a long period of time because the coating, which is composed of germanium disulphide and/or germanium diselenide, surprisingly acts as a stabilizing protective coating which limits the corrosion processes in sulphide and/or selenide-containing phosphors induced by low-energy radiation.Type: GrantFiled: November 22, 1995Date of Patent: November 4, 1997Assignee: U.S. Philips CorporationInventors: Markus Haase, Helmut Bechtel, Wolfram Czarnojan, Dieter Wadow
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Patent number: 4651047Abstract: A projection television display tube having an evacuated envelope (1) with a display window (4) which has a display screen (5) on its inside and in front of which a light-permeable second window (6) is provided on the outside, a cooling liquid flowing through the space (7) between the display window (4) and the second window (6) from at least one inlet aperture to at least one outlet aperture. When in such a projection television display tube a cooling jacket(8) is provided at the area of the windows (4, 6) and around the said space (7) and is provided with at least one duct (9) and one pump (16) with connecting nipples (17,18) which transport the cooling liquid from the outlet aperture to the inlet aperture or apertures of the said space (7), an effective cooling is obtained with a power up to 40 W without outer pipes and without heat exchangers. By the forced circulation of the cooling liquid a good temperature compensation is obtained so that fewer stresses occur in the glass of the display window.Type: GrantFiled: May 24, 1985Date of Patent: March 17, 1987Assignee: U.S. Philips CorporationInventors: Albert A. Comberg, Alwin Knops, Heinrich A. Oepen, Dieter Wadow
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Patent number: 4389610Abstract: In electrophotography or electroradiography charge images are formed which are customarily made visible by means of toners. The invention provides an electrostatic probe device for the electric scanning of charge images. The device, therefore, is particularly suitable for use in conjunction with digital image processing and storage. The device in accordance with the invention comprises a large number of electrode tracks which are provided on a flat substrate and on which there is provided an insulating layer on which a conductive layer is provided. The latter layer comprises cut-outs at the area of the electrostatic probe electrode heads. This device is suitable for the simultaneous measurement of the charge distribution at some hundreds of measuring locations.Type: GrantFiled: November 28, 1980Date of Patent: June 21, 1983Assignee: U.S. Philips CorporationInventors: Ulrich Schiebel, Dieter Wadow