Patents by Inventor Stefan Tasch
Stefan Tasch 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).
-
Patent number: 7259396Abstract: The invention relates to a light source comprising a light-emitting element, which emits light in a first spectral region, and comprising a luminophore, which comes from the group of alkaline-earth orthosilicates and which absorbs a portion of the light emitted by the light source and emits light in another spectral region. According to the invention, the luminophore is an alkaline-earth orthosilicate, which is activated with bivalent europium and whose composition consists of: (2-x-y)SrOx(Ba, Ca)O (1-a-b-c-d)SiO2aP2O5bAl2O3cB2O3dGeO2: y Eu2+ and/or (2-x-y)BaOx((Sr, Ca)O (1-a-b-c-d)SiO2aP2O5bAl2O3cB2O3dGeO2: y Eu2+. The desired color (color temperature) can be easily adjusted by using a luminophore of the aforementioned type.Type: GrantFiled: August 4, 2006Date of Patent: August 21, 2007Assignee: Toyoda Gosei Co., Ltd.Inventors: Stefan Tasch, Peter Pachler, Gundula Roth, Walter Tews, Wolfgang Kempfert, Detlef Starick
-
Publication number: 20070138488Abstract: The invention relates to a light-emitting arrangement, having:—at least one light-emitting diode chip (1),—a multi-layer board (17) having a base (5) of a thermally well conducting material, in particular of metal, and—an electrical insulating and thermally conducting connection layer (2) between the emission surface of the light-diode chip (1) and the board (17).Type: ApplicationFiled: November 3, 2004Publication date: June 21, 2007Applicant: Tridonic Optoelectronics GmgHInventors: Stefan Tasch, Hans Hoschopf
-
Publication number: 20070090383Abstract: The light emitting device has a light emitting diode which is made of a nitride semiconductor and a phosphor which absorbs a part of lights emitted from the light emitting diode and emits different lights with wavelengths other than those of the absorbed lights. The phosphor is made of alkaline earth metal silicate fluorescent material activated with europium.Type: ApplicationFiled: November 30, 2006Publication date: April 26, 2007Applicants: Toyoda Gosei Co., Ltd., Tridonic Optoelectronics GMBH, Litec GBR, Leuchstoffwerk Breitungen GMBHInventors: Koichi Ota, Atsuo Hirano, Akihito Ota, Stefan Tasch, Peter Pachler, Gundula Roth, Walter Tews, Wolfgang Kempfert, Detlef Starick
-
Publication number: 20070075306Abstract: A light emitting device having an emitting element and an element mounting portion on which the emitting element is mounted. The element mounting portion is formed of aluminum nitride.Type: ApplicationFiled: September 21, 2006Publication date: April 5, 2007Applicants: TOYODA GOSEI CO., LTD., LEXEDIS LIGHTING GMBH, TRIDONIC OPTOELECTRONICS GESELLSCHAFT MIT BESCHRANKTER-HAFTUNGInventors: Toshimasa Hayashi, Takumi Narita, Hiroaki Kawaguchi, Peter Pachler, Christian Hochfilzer, Stefan Tasch
-
Patent number: 7187011Abstract: The invention relates to a light source comprising a light-emitting element, which emits light in a first spectral region, and comprising a luminophore, which comes from the group of alkaline-earth orthosilicates and which absorbs a portion of the light emitted by the light source and emits light in another spectral region. According to the invention, the luminophore is an alkaline-earth orthosilicate, which is activated with bivalent europium and whose composition consists of: (2-x-y)SrOx(Ba, Ca)O (1-a-b-c-d)SiO2 aP2O5 bAl2O3 cB2O3 dGeO2: y Eu2+ and/or (2-x-y)BaO x((Sr, Ca)O (1-a-b-c-d)SiO2 aP2O5 bAl2O3 cB2O3 dGeO2: y Eu2+. The desired color (color temperature) can be easily adjusted by using a luminophore of the aforementioned type.Type: GrantFiled: October 26, 2004Date of Patent: March 6, 2007Assignee: Toyoda Gosei Co., Ltd.Inventors: Stefan Tasch, Peter Pachler, Gundula Roth, Walter Tews, Wolfgang Kempfert, Detlef Starick
-
Patent number: 7157746Abstract: The light emitting device has a light emitting diode which is made of a nitride semiconductor and a phosphor which absorbs a part of lights emitted from the light emitting diode and emits different lights with wavelengths other than those of the absorbed lights. The phosphor is made of alkaline earth metal silicate fluorescent material activated with europium.Type: GrantFiled: September 30, 2004Date of Patent: January 2, 2007Assignees: Toyoda Gosei Co., Ltd., Tridonic Optoelectronics GmbH, Litec GBR, Leuchstoffwerk Breitungen GmbHInventors: Koichi Ota, Atsuo Hirano, Akihito Ota, Stefan Tasch, Peter Pachler, Gundula Roth, Walter Tews, Wolfgang Kempfert, Detlef Starick
-
Publication number: 20060284865Abstract: The present invention is based on a regulation circuit (200a, 200b) for making available a constant current supply on the basis of a transformer principle, in which there flows through the luminescent diodes (D1, . . . ,DN) a triangular a.c. current (ID) varying periodically around a d.c. current value. With this method it is afforded by means of a circuitry provision that both the charging and also the discharging current (IL1) of an inductive reactance (XL1) connected in series to the luminescent diodes (D1, . . . ,DN), functioning as a storage choke (L1) for filtering of mains harmonics, flows as diode current (ID) through the luminescent diodes (D1, . . . ,DN). The advantage of this method consists in a significant reduction of the overall power loss (PV,ges) of the LED illumination module (100).Type: ApplicationFiled: July 14, 2006Publication date: December 21, 2006Applicants: Tridonic Optoelectronics GmbH, Knobel AG Lichttechnische KomponentenInventors: Felix Tobler, Michael Zimmermann, Stefan Tasch
-
Publication number: 20060267031Abstract: The invention relates to a light source comprising a light-emitting element, which emits light in a first spectral region, and comprising a luminophore, which comes from the group of alkaline-earth orthosilicates and which absorbs a portion of the light emitted by the light source and emits light in another spectral region. According to the invention, the luminophore is an alkaline-earth orthosilicate, which is activated with bivalent europium and whose composition consists of: (2-x-y)SrOx(Ba, Ca)O (1-a-b-c-d)SiO2aP2O5bAl2O3cB2O3dGeO2: y Eu2+ and/or (2-x-y)BaOx((Sr, Ca)O (1-a-b-c-d)SiO2aP2O5bAl2O3cB2O3dGeO2: y Eu2+. The desired color (color temperature) can be easily adjusted by using a luminophore of the aforementioned type.Type: ApplicationFiled: August 4, 2006Publication date: November 30, 2006Inventors: Stefan Tasch, Peter Pachler, Gundula Roth, Walter Tews, Wolfgang Kempfert, Detlef Starick
-
Patent number: 7138660Abstract: The light emitting device has a light emitting diode which is made of a nitride semiconductor and a phosphor which absorbs a part of lights emitted from the light emitting diode and emits different lights with wavelengths other than those of the absorbed lights. The phosphor is made of alkaline earth metal silicate fluorescent material activated with europium.Type: GrantFiled: March 24, 2005Date of Patent: November 21, 2006Assignees: Toyoda Gosei Co., Ltd., Tridonic Optoelectronics GmbH, Litec GBR, Leuchstoffwerk Breitungen GmbHInventors: Koichi Ota, Atsuo Hirano, Akihito Ota, Stefan Tasch, Peter Pachler, Gundula Roth, Walter Tews, Wolfgang Kempfert, Detlef Starick
-
Publication number: 20050218836Abstract: The present invention is based on a regulation circuit (200a, 200b) for making available a constant current supply on the basis of a transformer principle, in which there flows through the luminescent diodes (D1, . . . ,DN) a triangular a.c. current (ID) varying periodically around a d.c. current value. With this method it is afforded by means of a circuitry provision that both the charging and also the discharging current (IL1) of an inductive reactance (XL1) connected in series to the luminescent diodes (D1, . . . ,DN), functioning as a storage choke (L1) for filtering of mains harmonics, flows as diode current (ID) through the luminescent diodes (D1, . . . ,DN). The advantage of this method consists in a significant reduction of the overall power loss (PV, ges) of the LED illumination module (100).Type: ApplicationFiled: January 4, 2005Publication date: October 6, 2005Applicants: Tridonic Optoelectronics GmbH, Knobel AG Lichttechnische KomponentenInventors: Felix Tobler, Michael Zimmermann, Stefan Tasch
-
Patent number: 6943380Abstract: The light emitting device has a light emitting diode which is made of a nitride semiconductor and a phosphor which absorbs a part of lights emitted from the light emitting diode and emits different lights with wavelengths other than those of the absorbed lights. The phosphor is made of alkaline earth metal silicate fluorescent material activated with europium.Type: GrantFiled: December 28, 2001Date of Patent: September 13, 2005Assignees: Toyoda Gosei Co., Ltd., Tridonic Optoelectronics GmbH, Litec GBR, Leuchstoffwerk Breitungen GmbHInventors: Koichi Ota, Atsuo Hirano, Akihito Ota, Stefan Tasch, Peter Pachler, Gundula Roth, Walter Tews, Wolfgang Kempfert, Detlef Starick
-
Publication number: 20050162069Abstract: The light emitting device has a light emitting diode which is made of a nitride semiconductor and a phosphor which absorbs a part of lights emitted from the light emitting diode and emits different lights with wavelengths other than those of the absorbed lights. The phosphor is made of alkaline earth metal silicate fluorescent material activated with europium.Type: ApplicationFiled: March 24, 2005Publication date: July 28, 2005Applicants: Toyoda Gosei Co., Ltd., Tridonic Optoelectronics GMBH, Litec GBR, Leuchstoffwerk Breitungen GMBHInventors: Koichi Ota, Atsuo Hirano, Akihito Ota, Stefan Tasch, Peter Pachler, Gundula Roth, Walter Tews, Wolfgang Kempfert, Detlef Starick
-
Publication number: 20050082574Abstract: The invention relates to a light source comprising a light-emitting element, which emits light in a first spectral region, and comprising a luminophore, which comes from the group of alkaline-earth orthosilicates and which absorbs a portion of the light emitted by the light source and emits light in another spectral region. According to the invention, the luminophore is an alkaline-earth orthosilicate, which is activated with bivalent europium and whose composition consists of: (2-x-y)SrOx(Ba, Ca)O (1-a-b-c-d)SiO2 aP2O5 bAl2O3 cB2O3 dGeO2: y Eu2+ and/or (2-x-y)BaO x((Sr, Ca)O (1-a-b-c-d)SiO2 aP2O5 bAl2O3 cB2O3 dGeO2: y Eu2+. The desired color (color temperature) can be easily adjusted by using a luminophore of the aforementioned type.Type: ApplicationFiled: October 26, 2004Publication date: April 21, 2005Inventors: Stefan Tasch, Peter Pachler, Gundula Roth, Walter Tews, Wolfgang Kempfert, Detlef Starick
-
Publication number: 20050077532Abstract: The light emitting device has a light emitting diode which is made of a nitride semiconductor and a phosphor which absorbs a part of lights emitted from the light emitting diode and emits different lights with wavelengths other than those of the absorbed lights. The phosphor is made of alkaline earth metal silicate fluorescent material activated with europium.Type: ApplicationFiled: September 30, 2004Publication date: April 14, 2005Applicants: Toyoda Gosei Co., Ltd., Tridonic Optoelectronics GMBH, Litec GBR, Leuchstoffwerk Breitungen GMBHInventors: Koichi Ota, Atsuo Hirano, Akihito Ota, Stefan Tasch, Peter Pachler, Gundula Roth, Walter Tews, Wolfgang Kempfert, Detlef Starick
-
Patent number: 6809347Abstract: The invention relates to a light source comprising a light-emitting element, which emits light in a first spectral region, and comprising a luminophore, which comes from the group of alkaline-earth orthosilicates and which absorbs a portion of the light emitted by the light source and emits light in another spectral region. According to the invention, the luminophore is an alkaline-earth orthosilicate, which is activated with bivalent europium and whose composition consists of: (2-x-y)SrOx(Ba, Ca)O(1-a-b-c-d)SiO2aP2O5bAl2O3cB2O3dGeO2:yEu2+ and/or (2-x-y)BaOx((Sr, Ca)O(1-a-b-c-d)SiO2aP2O5bAl2O3cB2O3dGeO2:yEu2+. The desired color (color temperature) can be easily adjusted by using a luminophore of the aforementioned type.Type: GrantFiled: December 22, 2003Date of Patent: October 26, 2004Assignees: Leuchtstoffwerk Breitungen GmbH, Tridonic Optoelectronics GmbH, Bitec GbR, Toyoda Gosei Co., Ltd.Inventors: Stefan Tasch, Peter Pachler, Gundula Roth, Walter Tews, Wolfgang Kempfert, Detlef Starick
-
Publication number: 20040090174Abstract: The invention relates to a light source comprising a light-emitting element, which emits light in a first spectral region, and comprising a luminophore, which comes from the group of alkaline-earth orthosilicates and which absorbs a portion of the light emitted by the light source and emits light in another spectral region. According to the invention, the luminophore is an alkaline-earth orthosilicate, which is activated with bivalent europium and whose composition consists of: (2-x-y)SrOx(Ba, Ca)O(1-a-b-c-d)SiO2aP2O5bAl2O3cB2O3dGeO2:yEu2+ and/or (2-x-y)BaOx((Sr, Ca)O(1-a-b-c-d)SiO2aP2O5bAl2O3cB2O3dGeO2:yEu2+. The desired color (color temperature) can be easily adjusted by using a luminophore of the aforementioned type.Type: ApplicationFiled: December 22, 2003Publication date: May 13, 2004Inventors: Stefan Tasch, Peter Pachler, Gundula Roth, Walter Tews, Wolfgang Kempfert, Detlef Starick
-
Publication number: 20040051111Abstract: The light emitting device has a light emitting diode which is made of a nitride semiconductor and a phosphor which absorbs a part of lights emitted from the light emitting diode and emits different lights with wavelengths other than those of the absorbed lights. The phosphor is made of alkaline earth metal silicate fluorescent material activated with europium.Type: ApplicationFiled: June 30, 2003Publication date: March 18, 2004Inventors: Koichi Ota, Atsuo Hirano, Akihito Ota, Stefan Tasch, Peter Pachler, Gundula Roth, Walter Tews, Wolfgang Kempfert, Detlef Starick
-
Patent number: 6117529Abstract: An electroluminescence color display screen comprising an organic electroluminescence layer disposed between a patterned base electrode layer and a patterned top electrode layer, and further comprising a color conversion layer and a spectrally selective reflector for improving the color efficiency of the color display screen.Type: GrantFiled: December 18, 1996Date of Patent: September 12, 2000Assignee: Gunther LeisingInventors: Gunther Leising, Stefan Hampel, Farideh Meghdadi, Berthold Winkler, Christoph Brandstatter, Ullrich Scherf, Stefan Tasch
-
Patent number: 5949188Abstract: Electroluminescence color display screen with matrix picture elements (pixels), the display screen comprising a system of single layers applied on top of and partially next to one another, the layer system comprising an insulating, optically at least translucent base layer, a conductive, optically at least translucent base electrode, a patterned electrically insulating intermediate layer, if necessary, one or several color conversion layers applied in form of a matrix and, if necessary, one or several index matching layers, wherein the base electrode is deposited as a continuous layer upon the entire area of the base layer, wherein the insulating intermediate layer encloses and projects past pixel areas made of the organic electroluminescence layer and arranged to form a matrix, and wherein the top electrode applied on top of each pixel area extends partially across the adjacent lattice wall.Type: GrantFiled: December 18, 1996Date of Patent: September 7, 1999Assignee: Hage GmbH & Co. KGInventors: Gunther Leising, Stefan Hampel, Farideh Meghdadi, Stefan Tasch