Patents by Inventor Friedrich-Karl Bruder

Friedrich-Karl Bruder 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).

  • Publication number: 20220002321
    Abstract: The invention relates to a process for preparing triaryl organoborates proceeding from organoboronic esters in the presence of an n-valent cation 1/n Kn+, comprising the anhydrous workup of the reaction mixture and the use of the triaryl organoborates obtained as co-initiator in photopolymer formulations, holographic media and holograms.
    Type: Application
    Filed: November 18, 2020
    Publication date: January 6, 2022
    Inventors: Thomas RÖLLE, Horst BERNETH, Dennis HÖNEL, Friedrich-Karl BRUDER, Jürgen KINTRUP
  • Patent number: 11098066
    Abstract: Provided herein is a process for preparing triaryl organoborates of the formula 1/n Kn+R34B?—R1 (IV), where one equivalent of organoboronic ester of the formula B—R1(OR2)(OR3) (I) is initially charged together with 1/n equivalents of salt Kn+ nX? (II) and 3 equivalents of metal M in a solvent or a solvent mixture S1, 3 equivalents of a haloaromatic R4—Y (III) are added, an auxiliary L and optionally a second organic solvent or solvent mixture S2 is added and the compound 1/n Kn+ R34B?—R1 (IV) is separated off with the organic phase, and to the use of these substances as co-initiator in photopolymer formulations.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: August 24, 2021
    Assignee: Covestro Deutschland AG
    Inventors: Thomas Rölle, Horst Berneth, Dennis Hönel, Friedrich-Karl Bruder, Jürgen Kintrup
  • Patent number: 11078218
    Abstract: Provided herein is a process for preparing triaryl organoborates proceeding from alkyl or cycloalkyl boronates in the presence of an n-valent cation 1/n Kn+ to obtain organoborates of the formula 1/n Kn+R34B?—R1 (IV), where one equivalent of organoboronic ester of the formula B—R1(OR2)(OR3) (I) is initially charged together with 1/n equivalents of salt Kn+ nX? (II) and 3 equivalents of metal M in a solvent or a solvent mixture, 3 equivalents of a haloaromatic R4—Y (III) are added, and optionally a second organic solvent water is added and the compound 1/n Kn+ R24B?—R1 (IV) is separated off with the organic phase, and to the use of these substances as co-initiator in photopolymer formulations.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: August 3, 2021
    Assignee: Covestro Deutschland AG
    Inventors: Thomas Rölle, Horst Berneth, Dennis Hönel, Friedrich-Karl Bruder
  • Patent number: 10921751
    Abstract: The invention relates to a method for producing a holographic optical element by providing a recording stack comprising at least one recording element laminated on at least one supporting element, irradiating at least a part of the recording stack with at least one recording beam in an irradiating step, wherein during the irradiating step, the recording stack bends, providing a bending deviation threshold for the recording stack, and adjusting at least one first process parameter such that an expected maximum bending deviation of the recording stack does not exceed the bending deviation threshold, wherein the at least one first process parameter influences the bending behaviour of the recording stack during the irradiating step.
    Type: Grant
    Filed: August 8, 2018
    Date of Patent: February 16, 2021
    Assignees: LG Display Co., Ltd., Covestro Deutschland AG
    Inventors: Hyungseok Bang, Heejin Im, Guensik Lee, Friedrich-Karl Bruder, Thomas Peter Facke, Marc-Stephan Weiser, Rainer Hagen, Thomas Rolle, Horst Berneth, Dennis Honel, Günther Walze
  • Patent number: 10915066
    Abstract: The invention relates to an apparatus (200, 300, 400, 600) for producing volume reflection holograms with substrate-guided reconstruction beams, comprising: at least one transparent, planar carrier element (210, 310, 410, 610) comprising a first flat side (210.1) and a further flat side (210.2), at least one master element (206, 306, 406, 606) arrangeable at the first flat side (210.1) of the carrier element (210, 310, 410, 610) and at least one optical input coupling element (102, 202, 302, 402, 602) configured to optically couple a light beam (214, 216), wherein provision is made of at least one coupling portion (104, 204, 304, 404, 604) configured to mechanically establish an optical contact between the input coupling element (102, 202, 302, 402) and at least one holographic recording medium (208, 308, 408) providable on the further flat side (210.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: February 9, 2021
    Assignee: Covestro Deutschland AG
    Inventors: Christian Rewitz, Rainer Hagen, Thomas Fäcke, Günther Walze, Friedrich-Karl Bruder
  • Patent number: 10670789
    Abstract: A method for recording a plurality of scatter volume holograms in a photopolymeric recording medium, the method including at least the following steps providing a first laser light source, providing a photopolymeric recording medium including a substrate and a photoactive layer, wherein the photopolymeric recording medium has an index modulation ?n of at least 0.04 and a thickness d of the photoactive layer of at least 25 ?m, and irradiating the photopolymeric recording medium with the first laser light beam generated by the first laser light source with a minimum irradiation energy dosage of 3*Di, Di being the inhibition dosage of the photoactive layer.
    Type: Grant
    Filed: November 18, 2016
    Date of Patent: June 2, 2020
    Assignee: Covestro Deutschland AG
    Inventors: Thomas Fäcke, Friedrich-Karl Bruder, Günther Walze, Andrey Putilin
  • Patent number: 10620361
    Abstract: Provided is a back light unit for a display device that has a light guide film. The light guide film includes, for example, a light entering part at a first side; a light reflecting part disposed at a second side; and a light guiding part between the light entering part and the light reflecting part, wherein the light entering part selectively sends an incident light of an expanded light provided from a light source that satisfies a total reflection condition toward the light guiding part, and wherein the light reflecting part converts the incident light provided from the light guiding part into a collimated light and sends it to the light guiding part.
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: April 14, 2020
    Assignees: LG DISPLAY CO., LTD., COVESTRO DEUTSCHLAND AG.
    Inventors: Hyungseok Bang, Seungman Ryu, Friedrich-Karl Bruder
  • Patent number: 10606212
    Abstract: The invention relates to a method for selecting compounds which can be used as additives in photopolymer formulations for producing light holographic media, and to photopolymer formulations which contain at least one softener which are selected according to the claimed method. The invention also relates to the use of photopolymer formulations for producing holographic media.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: March 31, 2020
    Assignee: Covestro Deutschland AG
    Inventors: Thomas Roelle, Friedrich-Karl Bruder, Thomas Fäcke, Marc-Stephan Weiser, Dennis Hönel, Christian Diedrich
  • Patent number: 10514657
    Abstract: The invention relates to a method for selecting compounds which can be used as additives in photopolymer formulations for producing light holographic media, and to photopolymer formulations which contain at least one softener which are selected according to the claimed method. The invention also relates to the use of photopolymer formulations for producing holographic media.
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: December 24, 2019
    Assignee: Covestro Deutschland AG
    Inventors: Thomas Roelle, Friedrich-Karl Bruder, Thomas Fäcke, Marc-Stephan Weiser, Dennis Hönel, Christian Diedrich
  • Patent number: 10477197
    Abstract: An autostereoscopic 3D display device is disclosed. The device includes a first light source and a second light source configured to alternately generate light and a light guide panel arranged to guide the light from the first light source in a first direction as a first light beam and the light from the second light source in a second direction as a second light beam. In the device, a stack of a plurality of holographic optical elements is configured to converge the first light beam and the second light beam from the light guide panel. The stack of the plurality of holographic optical elements may include at least one first holographic optical element and at least one second holographic optical element.
    Type: Grant
    Filed: February 17, 2015
    Date of Patent: November 12, 2019
    Inventors: Friedrich-Karl Bruder, Rainer Hagen, Thomas Fäcke, Günther Walze, Eun Soo Kim, Yong Seok Hwang
  • Patent number: 10444420
    Abstract: The invention relates to an indirect lighting arrangement (2, 2.1, 2.2, 2.3, 2.4, 2.5) comprising at least one cylindrical waveguide (4). At least one end (12.1, 12.2) of the cylindrical waveguide (4) is designed to couple light from a first light source (1) into the cylindrical waveguide (4), and the lateral surface (10) of the cylindrical wave guide (4) has a coupling section (6) which is designed to optically couple the cylindrical waveguide (4) to an arrangeable plate-shaped waveguide (16). At least the coupling section (6) has at least one holographic optical element (8) which is designed to emit light from the cylindrical waveguide (4) into the arrangeable plate-shaped waveguide (16).
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: October 15, 2019
    Assignee: Covestro Deutschland AG
    Inventors: Rainer Hagen, Günther Walze, Thomas Fäcke, Friedrich-Karl Bruder, Dennis Hönel, Thomas Rölle, Horst Berneth, Marc-Stephan Weiser
  • Publication number: 20190276479
    Abstract: The invention relates to a process for preparing triaryl organoborates proceeding from alkyl or cycloalkyl boronates in the presence of an n-valent cation 1/n Kn+ and to the use of these substances as co-initiator in photopolymer formulations.
    Type: Application
    Filed: November 7, 2017
    Publication date: September 12, 2019
    Inventors: Thomas RÖLLE, Horst BERNETH, Dennis HÖNEL, Friedrich-Karl BRUDER
  • Publication number: 20190263838
    Abstract: The invention relates to a process for preparing triaryl organoborates proceeding from organoboronic esters in the presence of an n-valent cation 1/n Kn+, comprising the anhydrous workup of the reaction mixture and the use of the triaryl organoborates obtained as co-initiator in photopolymer formulations, holographic media and holograms.
    Type: Application
    Filed: November 7, 2017
    Publication date: August 29, 2019
    Inventors: Thomas ROLLE, Horst BERNETH, Dennis HONEL, Friedrich-Karl BRUDER, Jurgen KINTRUP
  • Patent number: 10329244
    Abstract: The invention relates to novel compounds which are especially suitable for use as writing monomers in holographic media. The invention further provides a photopolymer and a holographic medium comprising the inventive compounds, and an optical display, a security document and a holographic optical element comprising an inventive holographic medium.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: June 25, 2019
    Assignee: Covestro Deutschland AG
    Inventors: Thomas Fäcke, Friedrich-Karl Bruder, Thomas Rölle, Dennis Hönel
  • Patent number: 10254465
    Abstract: The invention relates to an illumination device for illuminating at least one light modulator system of a liquid crystal display, the device comprising at least one waveguide substrate for guiding at least one targeted light beam that can be coupled into the waveguide substrate. The waveguide substrate is at least in optical contact with at least one holographic optical decoupling substrate comprising a plurality of decoupling regions and a decoupling region is at least designed to decouple part of the targeted light beam in the form of a plurality of sub-beams in the direction of the light modulator system. At least one diffuser module is provided, said diffuser module being designed in such a way that at least the outermost sub-beams of two neighboring decoupling regions are at least adjacent to one another before exiting the diffuser module.
    Type: Grant
    Filed: August 9, 2013
    Date of Patent: April 9, 2019
    Assignee: Covestro Deutschland AG
    Inventors: Thomas Fäcke, Friedrich-Karl Bruder, Rainer Hagen, Günther Walze, Thomas Roelle, Horst Berneth, Dennis Hönel, Marc-Stephan Weiser, Werner Hoheisel
  • Patent number: 10241402
    Abstract: The invention relates to naphthyl urethane acrylates particularly useful as writing monomers in photopolymer formulations for holographic media. The invention further relates to a photopolymer formulation comprising matrix polymers, writing monomers and photoinitiators, wherein the writing monomers comprise a naphthyl urethane acrylate according to the invention, to a holographic medium comprising matrix polymers, writing monomers and photoinitiators, wherein the writing monomers comprise a naphthyl urethane acrylate according to the invention, and also to a display comprising a holographic medium according to the invention.
    Type: Grant
    Filed: December 9, 2015
    Date of Patent: March 26, 2019
    Assignee: Covestro Deutschland AG
    Inventors: Thomas Rölle, Horst Berneth, Friedrich-Karl Bruder, Dennis Hönel, Serguei Kostromine, Thomas Fäcke
  • Publication number: 20190011880
    Abstract: The invention relates to an apparatus (200, 300, 400, 600) for producing volume reflection holograms with substrate-guided reconstruction beams, comprising: at least one transparent, planar carrier element (210, 310, 410, 610) comprising a first flat side (210.1) and a further flat side (210.2), at least one master element (206, 306, 406, 606) arrangeable at the first flat side (210.1) of the carrier element (210, 310, 410, 610) and at least one optical input coupling element (102, 202, 302, 402, 602) configured to optically couple a light beam (214, 216), wherein provision is made of at least one coupling portion (104, 204, 304, 404, 604) configured to mechanically establish an optical contact between the input coupling element (102, 202, 302, 402) and at least one holographic recording medium (208, 308, 408) providable on the further flat side (210.
    Type: Application
    Filed: December 19, 2016
    Publication date: January 10, 2019
    Inventors: Christian REWITZ, Rainer HAGEN, Thomas FÄCKE, Günther WALZE, Friedrich-Karl BRUDER
  • Publication number: 20180348704
    Abstract: The invention relates to a method for producing a holographic optical element by providing a recording stack comprising at least one recording element laminated on at least one supporting element, irradiating at least a part of the recording stack with at least one recording beam in an irradiating step, wherein during the irradiating step, the recording stack bends, providing a bending deviation threshold for the recording stack, and adjusting at least one first process parameter such that an expected maximum bending deviation of the recording stack does not exceed the bending deviation threshold, wherein the at least one first process parameter influences the bending behaviour of the recording stack during the irradiating step.
    Type: Application
    Filed: August 8, 2018
    Publication date: December 6, 2018
    Inventors: Hyungseok BANG, Heejin IM, Guensik LEE, Friedrich-Karl BRUDER, Thomas Peter FACKE, Marc-Stephan WEISER, Rainer HAGEN, Thomas ROLLE, Horst BERNETH, Dennis HONEL, Günther WALZE
  • Publication number: 20180329127
    Abstract: The invention relates to a method for recording a plurality of scatter volume holograms in a photopolymeric recording medium, the method comprising at least the following steps providing a first laser light source, providing a photopolymeric recording medium comprising a substrate and a photoactive layer, wherein the photopolymeric recording medium has an index modulation ?n of at least 0.
    Type: Application
    Filed: November 18, 2016
    Publication date: November 15, 2018
    Inventors: Thomas FÄCKE, Friedrich-Karl BRUDER, Günther WALZE, Andrey PUTILIN
  • Patent number: 10082614
    Abstract: The disclosure relates to a viewing angle switchable back light unit wherein a general mode and a privacy mode in a liquid crystal display can be selected. A thin film type back light unit includes a light guide film, a light radiator, a first light source, and a light collimator. The light guide film includes a light entering part at one side, a light guiding part extending from the one side to an opposite side of the one side, and a light radiating part on one plane surface. The light radiator is on the light radiating part. The first light source faces the light entering part. The light collimator is on the light entering part facing the first light source. The light collimator receives an expanding light from the first light source, converts the expanding light into collimated light, and provides the collimated light to the light entering part.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: September 25, 2018
    Assignees: LG Display Co., Ltd., Covestro Deutschland AG
    Inventors: Hyungseok Bang, Seungman Ryu, Joobong Hyun, Yongku Lee, Dongyeon Kim, Friedrich-Karl Bruder, Günther Walze