Patents by Inventor Petra Huppertz
Petra Huppertz 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: 11552225Abstract: Embodiments include a device having a micro-LED that includes at least two, individually addressable light emitting diodes on a same substrate; a phosphor converter layer disposed on the micro-LED, the phosphor converter layer including phosphor particles having a D50 of greater than 1 ?m and less than 10 ?m.Type: GrantFiled: May 29, 2020Date of Patent: January 10, 2023Assignee: Lumileds LLCInventors: Hans-Helmut Bechtel, Jens Meyer, Matthias Heidemann, Petra Huppertz, Joerg Feldmann
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Publication number: 20200411736Abstract: Embodiments include a device having a micro-LED that includes at least two, individually addressable light emitting diodes on a same substrate; a phosphor converter layer disposed on the micro-LED, the phosphor converter layer including phosphor particles having a D50 of greater than 1 ?m and less than 10 ?m.Type: ApplicationFiled: May 29, 2020Publication date: December 31, 2020Inventors: Hans-Helmut BECHTEL, Jens MEYER, Matthias HEIDEMANN, Petra HUPPERTZ, Joerg FELDMANN
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Publication number: 20120063151Abstract: The invention relates to illumination devices (1) with a light source (2) and an afterglow surface (4) comprising a phosphor. The phosphor has an afterglow emission peak at a temperature above about 100° C. and/or has the formula (Sr1-zMz)4Al14O25:Eu, Ln, Xk with M ? {Ca, Ba, Mg}, Ln ? {Dy, Nd}, X ? {Yb, Tm, Sm}.Type: ApplicationFiled: May 7, 2010Publication date: March 15, 2012Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Thomas Juestel, Joerg Meyer, Klaus Schoeller, Juergen Flechsig, Petra Huppertz, Detlef U. Wiechert, Danuta A. Dacyl, Dietmar D. Bayerlein
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Patent number: 7855497Abstract: A dielectric barrier Xe discharge lamp include discharge vessel with a gas filling containing Xe or a Xe/Ne mixture and a luminescent layer of a UV-B phosphor emitting in the UV-B range 280 to 320 nm. The luminescent layer includes a Gd3+ activated phosphor according to at least one the formulas of (Y1-x-yGdxSy)Al3(BO3)4, (La1-x-yGdxSy)Al3(BO3)4, (La1-x-yGdxSy)B3O6, (Y1-x-y-zGdxSyLuz)PO4, (Y1-x-y-zGdxSyLuz)BO3, (Y1-x-y-zGdxSyLuz)3Al5O12, Me(Y1-x-yGdxSy)F4 (Me=Li, Na, K; S?Bi, Nd, Pr; 0.0<x,z?1.0; 0.0<y?0.1) or a mixture thereof. The luminescent layer may be sensitized by Bi3+, Pr3+ or Nd3+.Type: GrantFiled: April 19, 2005Date of Patent: December 21, 2010Assignee: Koninklijke Philips Electronics N.V.Inventors: Thomas Juestel, Petra Huppertz, Detlef Uwe Wiechert, Walter Mayr, Heinrich Von Busch
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Publication number: 20090223901Abstract: This invention relates to a dielectric barrier Xe discharge lamp comprising an UV-B phosphor. The lamp consists of a gas-tight, discharge vessel with a gas filling containing Xe or a Xe/Ne mixture and is provided with a luminescent layer, which comprises at least one luminescent material emitting in the UV-B range (280 to 320 nm). The luminescent layer comprises a Gd3+ activated phosphor according to the formulas McPO4:Gd, Lal1—XAl3(BO3)4:Gdx, and La1—xB3O6:Gdx which is eventually sensitised by Bi3+, Pr3+ or Nd3+ The advantages of such an UV-B emitting discharge lamp over fluorescent lamps based on a Hg low-pressure discharge are a high power density, 10 instant light, long lifetime, a spectral power distribution which is only determined by the phosphor blend, and an arbitrary burner design.Type: ApplicationFiled: April 19, 2005Publication date: September 10, 2009Applicant: Koninklijke Philips Electronic, N.V.Inventors: Thomas Juestel, Petra Huppertz, Detlef Uwe Wiechert, Walter Mayr, Heinrich Von Busch
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Publication number: 20090160341Abstract: The invention is concerned with a discharge lamp provided with a gas discharge vessel comprising a gas filling with a discharge-maintaining composition, at least part of a wall of the discharge vessel being provided with a luminescent material comprising as a first UV-phosphor a lanthanide-activated lanthanum magnesium aluminate of formula Lai_xMgAl?Oic>:Lnx, wherein the lanthanide Ln is selected from the group of Ce(III), Pr(III), Nd(III) and Gd(III), and 0.001<x<0.5, which discharge lamp is further provided with means for generating and maintaining a gas discharge. If it comprises gadolinium as an activator, such a lamp is especially useful for narrow-band UV-B phototherapy. The invention is also concerned with an UV-phosphor in the form of a lanthanide-activated lanthanum magnesium aluminate of formula Lai_xMgAl?Oic>:Lnx, wherein the lanthanide Ln is selected from the group of Ce(III), Pr(III), Nd(III) and Gd(III), and 0.001<x<0.5.Type: ApplicationFiled: March 28, 2007Publication date: June 25, 2009Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Thomas Jüstel, Petra Huppertz, Detlef Uwe Wiechert, Tatjana Rat
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Publication number: 20090014685Abstract: The invention relates to a luminescent material for an light emitting device comprising an (YGd)-containing nanoparticle material linked to at least one organic ligand moleculeType: ApplicationFiled: February 22, 2007Publication date: January 15, 2009Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Thomas Justel, Joachim Opitz, Petra Huppertz, Detlef Uwe Wiechert, Helga Bettentrup
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Patent number: 7446343Abstract: A phosphor converted light emitting device includes a semiconductor structure comprising a light emitting layer disposed between an n-type region and a p-type region, the light emitting layer being configured to emit light having a first peak wavelength; a first phosphor configured to emit light having a second peak wavelength; and a second phosphor configured to emit light having a third peak wavelength. The second phosphor is an Eu3+-activated phosphor, configured such that in the excitation spectrum at 298K and 1.013 bar, a maximum intensity in a wavelength range between 460 nm and 470 nm is at least 5% of a maximum intensity in a wavelength range between 220 nm to 320 nm.Type: GrantFiled: January 13, 2007Date of Patent: November 4, 2008Assignees: Philips Lumileds Lighting Company, LLC, Koninklijke Philips Electronics N.V. et al.Inventors: Gerd O. Mueller, Regina B Mueller-Mach, Thomas Juestel, Petra Huppertz, Detlef Uwe Wiechert, Dominik Uhlich
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Publication number: 20080023712Abstract: A phosphor converted light emitting device includes a semiconductor structure comprising a light emitting layer disposed between an n-type region and a p-type region, the light emitting layer being configured to emit light having a first peak wavelength; a first phosphor configured to emit light having a second peak wavelength; and a second phosphor configured to emit light having a third peak wavelength. The second phosphor is an Eu3+-activated phosphor, configured such that in the excitation spectrum at 298K and 1.013 bar, a maximum intensity in a wavelength range between 460 nm and 470 nm is at least 5% of a maximum intensity in a wavelength range between 220 nm to 320 nm.Type: ApplicationFiled: January 13, 2007Publication date: January 31, 2008Applicants: PHILIPS LUMILEDS LIGHTING COMPANY, LLC, KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Gerd Mueller, Regina Mueller-Mach, Thomas Juestel, Petra Huppertz, Detlef Wiechert, Dominik Uhlich
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Publication number: 20060033856Abstract: The invention relates to a display device comprising a first electrode (2) and a second electrode (6), and an optical layer (3) arranged between the electrodes (2, 6), which optical layer (3) emits light under the influence of an electric field applied between said electrodes (2, 6), and comprising a varistor layer (5) which is situated at least in the area of the pixels of the display device.Type: ApplicationFiled: October 28, 2003Publication date: February 16, 2006Inventors: Hans-Helmut Bechtel, Yourii Martynov, Wolfgang Busselt, Wilhelm Groen, Petra Huppertz
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Patent number: 6744204Abstract: A gas discharge lamp with at least one capacitive coupling structure (2, 3) is described, which lamp has the particular characteristic that the coupling structure (2, 3) comprises a ceramic material which comprises pure BaTiO3. In particular an additional doping of at least part of the BaTiO3 with barium leads to a material whose Curie temperature and saturation polarization are substantially higher and whose coercitive field strength is substantially smaller, so that a gas discharge lamp with a coupling structure manufactured from this material can be operated at substantially higher temperatures and at a lower operating voltage. Various dopings of the BaTiO3 with titanium, manganese, and lead are furthermore described.Type: GrantFiled: May 7, 2002Date of Patent: June 1, 2004Assignee: Koninklijke Philips Electronics N.V.Inventors: Wilhelm Albert Groen, Petra Huppertz, Knuth Albertsen, Bernd Rausenberger
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Publication number: 20020171375Abstract: A gas discharge lamp with at least one capacitive coupling structure (2, 3) is described, which lamp has the particular characteristic that the coupling structure (2, 3) comprises a ceramic material which comprises pure BaTiO3. In particular an additional doping of at least part of the BaTiO3 with barium leads to a material whose Curie temperature and saturation polarization are substantially higher and whose coercitive field strength is substantially smaller, so that a gas discharge lamp with a coupling structure manufactured from this material can be operated at substantially higher temperatures and at a lower operating voltage. Various dopings of the BaTiO3 with titanium, manganese, and lead are furthermore described.Type: ApplicationFiled: May 7, 2002Publication date: November 21, 2002Inventors: Wilhelm Albert Groen, Petra Huppertz, Knuth Albertsen, Bernd Rausenberger
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Patent number: 5790367Abstract: A capacitor having a ceramic dielectric and at least two electrodes, the ceramic dielectric being predominantly composed of a dielectric, ceramic composition having a main component of BaTiO.sub.3 and/or ?Ba.sub.1-y Sr.sub.y !Ti.sub.x O.sub.31 z, wherein 0.95.ltoreq.x.ltoreq.0.995, 0.ltoreq.y.ltoreq.0.04, z=2(1-x), and having at least an additive of the group formed by XMnO.sub.3, X.sub.2 MoO.sub.6, X.sub.2 WO.sub.6, X.sub.2 SiO.sub.5 +Mn.sub.2 SiO.sub.4 and Li.sub.2 SiO.sub.3 +Mn.sub.2 SiO.sub.4, and at least an additive of the group formed by Li.sub.2 SiO.sub.3, SiO.sub.2 and a mixture of 6 mol % Li.sub.2 O, 13 mol % BaO, 13 mol % SrO, 13 mol % MgO and 55 mol % SiO.sub.2, which is calcined at 800.degree. C., and, if necessary, an additive of the group formed by XInO.sub.3, XGaO.sub.3 and XAlO.sub.3, wherein X is one or more elements of the group formed by Y, Dy and Er, is characterized by a flat .DELTA.C/.DELTA.t curve and a stable dielectric behavior on exposure to temperature and voltage influences.Type: GrantFiled: December 10, 1996Date of Patent: August 4, 1998Assignee: U.S. Philips CorporationInventors: Dieter Mateika, Petra Huppertz, Knuth Albertsen, Oliver Steigelmann