Patents by Inventor Jann Schmidt
Jann Schmidt 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: 10466406Abstract: A process for producing a light guide plate includes producing a colorless transparent sheet from a colorless transparent material by extrusion with a polishing stack. A printed reflector film is laminated in-line to the colorless transparent sheet. The printed reflector film includes: a thermoplastic reflector film which is opaque white or translucent white and made of a thermoplastic material; and a colorless thermoplastic printed on the thermoplastic reflector film. There is no direct optical contact between the colorless transparent sheet and the thermoplastic reflector film. A glass transition temperature of the printed colorless thermoplastic is above 25° C. and below glass transition temperatures of the colorless transparent material of the colorless transparent sheet and of the thermoplastic material of the thermoplastic reflector film.Type: GrantFiled: July 3, 2014Date of Patent: November 5, 2019Assignee: EVONIK ROEHM GmbHInventors: Herbert Groothues, Jann Schmidt, Wangelis Karampougioukis, Stephan Neumayer, Helmut Haering, Berthold Schoenig
-
Patent number: 10007048Abstract: The present invention relates to light guide bodies having improved luminous intensity and transparency, to a method for their production and to their use.Type: GrantFiled: October 3, 2016Date of Patent: June 26, 2018Assignee: EVONIK ROEHM GmbHInventors: Jann Schmidt, Wojciech Pisula, Peter Stein, Christian Roth, Sabine Schwarz-Barac, Heiko Rochholz, Alexander Baum
-
Publication number: 20170023722Abstract: The present invention relates to light guide bodies having improved luminous intensity and transparency, to a method for their production and to their use.Type: ApplicationFiled: October 3, 2016Publication date: January 26, 2017Applicant: EVONIK DEGUSSA GmbHInventors: Jann SCHMIDT, Wojciech PISULA, Peter STEIN, Christian ROTH, Sabine SCHWARZ-BARAC, Heiko ROCHHOLZ, Alexander BAUM
-
Publication number: 20160170128Abstract: The present invention relates to novel light guide plates composed of a reflector film, of a transparent sheet and of, situated between these, reactive hot-melts or colourless thermoplastics applied by structured printing. No fixed direct connection exists here between the reflector film and the transparent sheet. Light guide plates, e.g. in backlight units (BLUs) or in light panels, have maximum uniformity of thickness and are composed of colourless transparent materials. Light is input here by way of example from LED or CCFL light sources by way of one or more edges of the light guide plate. On at least one surface of the light guide plate there is a structure which scatters the light. When a light beam is incident on the said structure, it is scattered at an angle smaller than the angle of total reflection, and is thus emitted from the plate. The light is emitted at both sides of the plate, and on one side there is therefore mostly a white reflector film which is not in optical contact with the plate.Type: ApplicationFiled: July 3, 2014Publication date: June 16, 2016Applicant: Evonik Roehm GmbHInventors: Herbert GROOTHUES, Jann SCHMIDT, Wangelis KARAMPOUGIOUKIS, Stephan NEUMAYER, Helmut HAERING, Berthold SCHOENIG
-
Patent number: 9201186Abstract: The invention relates to light guide plates, which are suitable for backlighting LCD monitors as well as information and advertising signs and which are illuminated at the edges and re-emit the light fed at the edges via at least one of the two surfaces located perpendicular to the edges. For the light of a light source that is fed at the edges to be able to leave the light guide plate again via one of the surfaces by overcoming total reflection, the light rays in the light guide plate have to be deliberately deflected. At one of the two surfaces of the light guide plate, the light guide plates are provided with optical impurities (2), which are protected against damage by a film (5). Furthermore, a method for the simplified application of said impurities is provided.Type: GrantFiled: May 25, 2010Date of Patent: December 1, 2015Assignee: Evonik Röhm GmbHInventors: Jann Schmidt, Christian Roth
-
Patent number: 8993093Abstract: A coated sheet-like plastics material comprising a) as base, a thermoplastic substrate; and b) on the base, a photocatalytically active coating comprising a water-spreading layer which involves either a sol-adhesion-promoter layer, layer b1+2), comprising an adhesion promoter and a colloid sol, or a colloid-sol layer b2) arranged on an adhesion-promoter layer b1) applied on the substrate a), and a photocatalytically active layer b3) arranged on the water-spreading layer b1+2) or b2), where b3) is obtainable through application and drying of a mixture comprising, based on the solids content of the mixture in percent by weight b31) from 1 to 25% of titanium dioxide and b32) from 75 to 99% of silicon dioxide and/or of a metal oxide which is not soluble in water or of an anionically modified silicon dioxide or metal oxide; where the titanium dioxide is particulate with an average primary-particle size smaller than 10 nm.Type: GrantFiled: March 2, 2011Date of Patent: March 31, 2015Assignee: Evonik Röhm GmbHInventors: Thomas Hasskerl, Wolfgang Scharnke, Martin Berkenkopf, Jann Schmidt, Xin Lu, Uwe Schneider
-
Publication number: 20140232027Abstract: The present invention relates to a method for continuously producing light guide plates, e.g. for use as backlighting in LC displays, and to an apparatus for carrying out said method.Type: ApplicationFiled: August 21, 2012Publication date: August 21, 2014Applicant: Evonik Roehm GmbHInventors: Wojciech Pisula, Jann Schmidt, Gerd Machleid, Alexander Baum
-
Publication number: 20130008585Abstract: A coated sheet-like plastics material comprising a) as base, a thermoplastic substrate; and b) on the base, a photocatalytically active coating comprising a water-spreading layer which involves either a sol-adhesion-promoter layer, layer b1+2), comprising an adhesion promoter and a colloid sol, or a colloid-sol layer b2) arranged on an adhesion-promoter layer b1) applied on the substrate a), and a photocatalytically active layer b3) arranged on the water-spreading layer b1+2) or b2), where b3) is obtainable through application and drying of a mixture comprising, based on the solids content of the mixture in percent by weight b31) from 1 to 25% of titanium dioxide and b32) from 75 to 99% of silicon dioxide and/or of a metal oxide which is not soluble in water or of an anionically modified silicon dioxide or metal oxide; where the titanium dioxide is particulate with an average primary-particle size smaller than 10 nm.Type: ApplicationFiled: March 2, 2011Publication date: January 10, 2013Applicant: Evonik Roehm GmbHInventors: Thomas Hasskerl, Wolfgang Scharnke, Martin Berkenkopf, Jann Schmidt, Xin Lu, Uwe Schneider
-
Publication number: 20120067512Abstract: The invention relates to light guide plates, which are suitable for backlighting LCD monitors as well as information and advertising signs and which are illuminated at the edges and re-emit the light fed at the edges via at least one of the two surfaces located perpendicular to the edges. For the light of a light source that is fed at the edges to be able to leave the light guide plate again via one of the surfaces by overcoming total reflection, the light rays in the light guide plate have to be deliberately deflected. At one of the two surfaces of the light guide plate, the light guide plates are provided with optical impurities (2), which are protected against damage by a film (5). Furthermore, a method for the simplified application of said impurities is provided.Type: ApplicationFiled: May 25, 2010Publication date: March 22, 2012Applicant: Evonik Roehm GmbHInventors: Jann Schmidt, Christian Roth
-
Publication number: 20120051696Abstract: The present invention relates to light guide bodies having improved luminous intensity and transparency, to a method for their production and to their use.Type: ApplicationFiled: February 18, 2011Publication date: March 1, 2012Applicant: EVONIK ROEHM GmbHInventors: Jann SCHMIDT, Wojciech PISULA, Peter STEIN, Christian ROTH, Sabine SCHWARZ-BARAC, Heiko ROCHHOLZ, Alexander LASCHITSCH
-
Publication number: 20110249939Abstract: The present invention relates to light guide bodies having improved luminous intensity and transparency, to a method for their production and to their use.Type: ApplicationFiled: February 18, 2011Publication date: October 13, 2011Applicant: EVONIK DEGUSSA GmbHInventors: Jann Schmidt, Wojciech Pisula, Peter Stein, Christian Roth, Sabine Schwarz-Barac, Heiko Rochholz, Alexander Laschitsch
-
Patent number: 7629041Abstract: The present invention relates to diffuser sheets for LCD applications encompassing at least one light-scattering polymethyl methacrylate layer which comprises a polymethyl methacrylate matrix and also from 0.5 to 59.5% by weight, based on the weight of the light-scattering polymethyl methacrylate layer, of spherical scattering particles (A) whose median size V50 is in the range from 0.1 to 40 ?m, and whose refractive index differs from that of the polymethyl methacrylate matrix by a value in the range from 0.02 to 0.2, and from 0.5 to 59.5% by weight, based on the weight of the light-scattering polymethyl methacrylate layer, of spherical particles (B) whose median size V50 is in the range from 10 to 150 ?m and whose refractive index differs from that of the polymethyl methacrylate matrix by a value in the range from 0 to 0.Type: GrantFiled: May 12, 2004Date of Patent: December 8, 2009Assignee: Evonik Roehm GmbHInventors: Markus Parusel, Jann Schmidt, Herbert Groothues
-
Patent number: 7602550Abstract: The present invention relates to rear-projection screens which have at least one scattering layer encompassing scattering particles and has at least one backing layer, characterized in that the halved-intensity angle of the scattering layer is greater than or equal to 15° and the halved-intensity angle of the backing layer is smaller than or equal to 6.5°, where the gloss R60° of the backing layer is smaller than or equal to 70.Type: GrantFiled: March 12, 2004Date of Patent: October 13, 2009Assignee: Roehm GmbH & Co. KGInventors: Markus Parusel, Jann Schmidt, Herbert Groothues
-
Publication number: 20090217453Abstract: PLEXIGLAS® is suitable—when provided with a structured and microrough surface —as an anti-slip covering for sanitary elements.Type: ApplicationFiled: February 2, 2007Publication date: September 3, 2009Applicant: EVONIK ROEHM GMBHInventors: Alexander Theil, Heinrich Gaul, Bernhard Ortlepp, Wolfgang Scharnke, Jann Schmidt
-
Publication number: 20080224339Abstract: The invention relates to coextruded foils with prism structure, to a process for production of coextruded foils with prism structure and to uses.Type: ApplicationFiled: October 2, 2006Publication date: September 18, 2008Inventors: Jann Schmidt, Alexander Laschitsch, Christian Roth, Christoph Krohmer, Helmut Haring, Detlef Birth
-
Publication number: 20080158670Abstract: The present invention relates to rear-projection screens which have at least one scattering layer encompassing scattering particles and has at least one backing layer, characterized in that the halved-intensity angle of the scattering layer is greater than or equal to 15° and the halved-intensity angle of the backing layer is smaller than or equal to 6.5°, where the gloss R60° of the backing layer is smaller than or equal to 70.Type: ApplicationFiled: March 12, 2004Publication date: July 3, 2008Applicant: ROEHM GBMH & CO., KGInventors: Markus Parusel, Jann Schmidt, Herbert Groothues
-
Patent number: 7339732Abstract: The present invention relates to a rear-projection screen encompassing at least one light-scattering polymethyl methacrylate layer, which comprises a polymethyl methacrylate matrix and spherical scattering particles (A) and spherical particles (B) with a different median particle size V50, where the spherical scattering particles (A) have a median size V50 in the range from 0.1 to 40 ?m, the difference between the refractive index of the spherical scattering particles (A) and that of the polymethyl methacrylate matrix being in the range from 0.02 to 0.2, where the spherical particles (B) have a median size V50 in the range from 10 to 150 ?m, the difference between the refractive index of the spherical particles (B) and that of the polymethyl methacrylate matrix being in the range from 0 to 0.Type: GrantFiled: March 12, 2004Date of Patent: March 4, 2008Assignee: Roehm GmbH & Co. KGInventors: Markus Parusel, Jann Schmidt, Herbert Groothues, Christoph Krohmer, Guenther Dickhaut-Bayer
-
Publication number: 20060240200Abstract: The present invention relates to diffuser sheets for LCD applications encompassing at least one light-scattering polymethyl methacrylate layer which comprises a polymethyl methacrylate matrix and also from 0.5 to 59.5% by weight, based on the weight of the light-scattering polymethyl methacrylate layer, of spherical scattering particles (A) whose median size V50 is in the range from 0.1 to 40 ?m, and whose refractive index differs from that of the polymethyl methacrylate matrix by a value in the range from 0.02 to 0.2, and from 0.5 to 59.5% by weight, based on the weight of the light-scattering polymethyl methacrylate layer, of spherical particles (B) whose median size V50 is in the range from 10 to 150 ?m and whose refractive index differs from that of the polymethyl methacrylate matrix by a value in the range from 0 to 0.Type: ApplicationFiled: May 12, 2004Publication date: October 26, 2006Applicant: ROEHM GBMH & CO. KGInventors: Markus Parusel, Jann Schmidt, Herbert Groothues
-
Publication number: 20060209403Abstract: The present invention relates to a rear-projection screen encompassing at least one light-scattering polymethyl methacrylate layer, which comprises a polymethyl methacrylate matrix and spherical scattering particles (A) and spherical particles (B) with a different median particle size V50, where the spherical scattering particles (A) have a median size V50 in the range from 0.1 to 40 ?m, the difference between the refractive index of the spherical scattering particles (A) and that of the polymethyl methacrylate matrix being in the range from 0.02 to 0.2, where the spherical particles (B) have a median size V50 in the range from 10 to 150 ?m, the difference between the refractive index of the spherical particles (B) and that of the polymethyl methacrylate matrix being in the range from 0 to 0.Type: ApplicationFiled: March 12, 2004Publication date: September 21, 2006Inventors: Markus Parusel, Jann Schmidt, Herbert Groothues, Christoph Krohmer, Gunther Dickhaut-Bayer
-
Patent number: 7064894Abstract: A rear-projection screen that has at least one light-scattering polymethyl methacrylate layer in which is embedded spherical plastic particles; the previously described rear-project screen that has an additional plastic sheet that does not have embedded scattering beads; and a method of making a rear-projection screen.Type: GrantFiled: September 27, 2003Date of Patent: June 20, 2006Assignee: Roehm GmbH & Co. KGInventors: Markus Parusel, Jann Schmidt, Herbert Groothues, Wolfgang Scharnke, Hans Lorenz, Helmut Haering, Guenther Dickhaut-Bayer