Patents by Inventor Claes-Goran Granqvist
Claes-Goran Granqvist 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: 8970938Abstract: An electrochromic device (1) comprises a layered structure (11) having an ion conducting electrolyte layer (20). The ion conducting electrolyte layer (20) in turn comprises particles (30) absorbing electromagnetic radiation. The particles (30) are electrically conducting. The particles have a main light absorption above 700 nm.Type: GrantFiled: March 26, 2012Date of Patent: March 3, 2015Assignee: Chromogenics ABInventor: Claes Göran Granqvist
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Publication number: 20140346415Abstract: A thermochromic material comprises VO2 doped with Mg. A method for manufacturing of VO2-based thermochromic material comprises the step of doping a VO2-based thermochromic material with Mg.Type: ApplicationFiled: August 13, 2014Publication date: November 27, 2014Inventors: Claes Göran Granqvist, Gunnar A. Niklasson, Nuru R. Mlyuka
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Patent number: 8889219Abstract: In a method for manufacturing of thermochromic material, a target increased luminous transmittance level for the thermochromic material is determined (210). The luminous transmittance level is defined within a predetermined wavelength region. Preferably, this predetermined wavelength region at least partly comprises visible light. A concentration level of a first dopant element is determined (212) for generating the luminous transmittance level of the thermochromic material. The first dopant element is capable of forming an oxide having a high bandgap in its electronic structure, and in a specific embodiment is Al and/or Mg. A VO2-based thermochromic material is doped (214) with the determined concentration level of the first dopant element. At least one second dopant may also be employed.Type: GrantFiled: September 30, 2009Date of Patent: November 18, 2014Assignee: Chromogenics ABInventors: Claes Göran Granqvist, Gunnar A. Niklasson, Nuru R. Mlyuka
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Publication number: 20140133007Abstract: An electrochromic device (1) comprises a layered structure (11) having an ion conducting electrolyte layer (20). The ion conducting electrolyte layer (20) in turn comprises particles (30) absorbing electromagnetic radiation. The particles (30) are electrically conducting. The particles have a main light absorption above 700 nm.Type: ApplicationFiled: March 26, 2012Publication date: May 15, 2014Applicant: CHROMOGENICS ABInventor: Claes Göran Granqvist
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Patent number: 8355194Abstract: An optical device (1) includes a first transparent substrate (10), a thermochromic device (20) covering a surface (11) of the first transparent substrate (10), a second transparent substrate (50), an electrochromic device (40) covering a surface (51) of the second transparent substrate (50) and a thermally insulating volume (30) separating the first transparent substrate (10) and the second transparent substrate (50). The thermally insulating volume (30) is preferably a vacuum volume or a volume (31) filled with gas.Type: GrantFiled: August 31, 2009Date of Patent: January 15, 2013Assignee: ChromoGenics ABInventor: Claes Göran Granqvist
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Patent number: 8132938Abstract: An illumination system (1) is based on a window (21) having controllable transmittance and a light guide system (31) arranged for transferring light from a light guide input (33) to a light guide output (34). The light guide output is located in a same space (50) as the window (21), but at a distance therefrom (21). The illumination system includes elements for balancing (40) the transmittance of the window and a throughput of the light guide system. Preferably, the window is an outer window, the light guide input (33) is arranged for gathering day light and the light guide output (34) is arranged to illuminate an area (52) within sight from the window (21). Preferably the transmittance of the window (21) and/or the light throughput of the light guide system (31) are controlled. A method for illuminating a space (50) having a window (21) with controllable transmittance is presented.Type: GrantFiled: October 16, 2007Date of Patent: March 13, 2012Assignee: ChromoGenics ABInventor: Claes Goran Granqvist
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Publication number: 20110260123Abstract: In a method for manufacturing of thermochromic material, a target increased luminous transmittance level for the thermochromic material is determined (210). The luminous transmittance level is defined within a predetermined wavelength region. Preferably, this predetermined wavelength region at least partly comprises visible light. A concentration level of a first dopant element is determined (212) for generating the luminous transmittance level of the thermochromic material. The first dopant element is capable of forming an oxide having a high bandgap in its electronic structure, and in a specific embodiment is Al and/or Mg. A VO2-based thermochromic material is doped (214) with the determined concentration level of the first dopant element. At least one second dopant may also be employed.Type: ApplicationFiled: September 30, 2009Publication date: October 27, 2011Inventors: Claes Göran Granqvist, Gunnar A. Niklasson, Nuru R. Mlyuka
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Publication number: 20110216388Abstract: An optical device (1) includes a first transparent substrate (10), a thermochromic device (20) covering a surface (11) of the first transparent substrate (10), a second transparent substrate (50), an electrochromic device (40) covering a surface (51) of the second transparent substrate (50) and a thermally insulating volume (30) separating the first transparent substrate (10) and the second transparent substrate (50). The thermally insulating volume (30) is preferably a vacuum volume or a volume (31) filled with gas.Type: ApplicationFiled: August 31, 2009Publication date: September 8, 2011Applicant: CHROMOGENICS ABInventor: Claes Goran Granqvist
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Patent number: 7952785Abstract: A manufacturing method of electrochromic devices (10) includes the steps of providing a first and second sheet including a first (22) and second (24) plastic substrate, respectively, at least partially coated with a first (12) and second (14) electron conducting layer, respectively. The first sheet is at least partially coated with a first electrochromic layer (16). The second sheet is at least partially coated with a counter electrode layer (18). The first and second sheets are laminated with an electrolyte layer (20) interposed in-between into an electrochromic laminate sheet (30). The electrochromic device is at least partially defined by forming a seal (50) through the electrochromic laminate sheet (30) at a distance (D) from a peripheral edge (31). The distance (D) is preferably larger than the mean diffusion lengths of oxygen, water or an electrolyte component in the electrolyte during a predetermined time period.Type: GrantFiled: July 25, 2007Date of Patent: May 31, 2011Assignee: Chromogenics Sweden ABInventors: Richard Karmhag, Greger Gustavsson, Claes Goran Granqvist, Andris Azens
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Publication number: 20100296081Abstract: An illumination system (1) is based on a window (21) having controllable transmittance and a light guide system (31) arranged for transferring light from a light guide input (33) to a light guide output (34). The light guide output is located in a same space (50) as the window (21), but at a distance therefrom (21). The illumination system includes elements for balancing (40) the transmittance of the window and a throughput of the light guide system. Preferably, the window is an outer window, the light guide input (33) is arranged for gathering day light and the light guide output (34) is arranged to illuminate an area (52) within sight from the window (21). Preferably the transmittance of the window (21) and/or the light throughput of the light guide system (31) are controlled. A method for illuminating a space (50) having a window (21) with controllable transmittance is presented.Type: ApplicationFiled: October 16, 2007Publication date: November 25, 2010Applicant: CHROMOGENICS ABInventor: Claes Goran Granqvist
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Patent number: 7731915Abstract: Pollutant decomposition device, including at least one outer transparent sheet and at least one inner transparent sheet being arranged such that a gap is formed between them and such that the gap is in communication with a surrounding gaseous composition on one side of the device such that the gaseous composition can pass through the gap. The device further including a photocatalyst arranged in the gap for depolluting the gaseous composition that pass through the gap. To obtain optimum decomposition efficiency the outer transparent sheet has a high degree of ultraviolet transmittance compared with the inner transparent sheet.Type: GrantFiled: March 20, 2003Date of Patent: June 8, 2010Assignee: ChromoGenics ABInventors: Claes-Göran Granqvist, Sten-Eric Lindqvist
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Publication number: 20090316248Abstract: A manufacturing method of electrochromic devices (10) includes the steps of providing a first and second sheet including a first (22) and second (24) plastic substrate, respectively, at least partially coated with a first (12) and second (14) electron conducting layer, respectively. The first sheet is at least partially coated with a first electrochromic layer (16). The second sheet is at least partially coated with a counter electrode layer (18). The first and second sheets are laminated with an electrolyte layer (20) interposed in-between into an electrochromic laminate sheet (30). The electrochromic device is at least partially defined by forming a seal (50) through the electrochromic laminate sheet (30) at a distance (D) from a peripheral edge (31). The distance (D) is preferably larger than the mean diffusion lengths of oxygen, water or an electrolyte component in the electrolyte during a predetermined time period.Type: ApplicationFiled: July 25, 2007Publication date: December 24, 2009Applicant: CHROMOGENICS SWEDEN ABInventors: Richard Karmhag, Greger Gustavsson, Claes Goran Granqvist, Andris Azens
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Publication number: 20090092523Abstract: Pollutant decomposition device comprising a flexible sheet-substrate provided with at least one photocatalytic surface wherein the sheet-substrate comprises one or more internal slits with a layout that provides formation of flow restricting means upon predetermined deformation of the sheet substrate. There is also provided a method of producing a pollutant decomposition device.Type: ApplicationFiled: November 1, 2007Publication date: April 9, 2009Applicant: CHROMOGENICS SWEDEN ABInventors: Claes-Goran GRANQVIST, Stefan Bertilsson
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Patent number: 7099062Abstract: Electrochromic film with the general formula: ApBqOxXy wherein: —A is one or more of the elements from the group consisting of Ni, Ir, Cr, V, Mn, Fe, W, Mo, Ti, Co, Ce, Pr and Hf; —B is one or more of the elements from the group consisting of Mg, Ca, Sr, Ba, Nb, Al, Zr, Ta and Si; —O is oxygen; —X is an element from the group consisting of: H, F and N; and the ratio q/p is greater than 0.2 and less than 3.5, x is greater than 0.5 (p+q) and less than 5 (p+q), and y is equal to or greater than 0 and less than 2x. The film may further comprise an amount of Li, Na or K. The invention further relates to an electrochromic device comprising at least one layer of said electrochromic film.Type: GrantFiled: September 26, 2002Date of Patent: August 29, 2006Assignee: Forskarpatent I Uppsala ABInventors: Andris Azens, Claes-Göran Granqvist, Richard Karmhag, Jan Isidorsson, Esteban Damian Avendano Soto
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Patent number: 6965813Abstract: The invention relates to a climate control system comprising at least one radiation reducer and a climate control unit for controlling the radiation reducer. Which system further comprises a usage detection system coupled to the climate control unit. It also relates to a method of climate control in a room, using a climate control system comprising at least one radiation reducer, which method comprises the steps of detecting if the room is in use or not, if in use, setting the radiation reducer in a mode of high transmittance, if not in use, setting the radiation reducer in a mode of low transmittance.Type: GrantFiled: March 4, 2003Date of Patent: November 15, 2005Assignee: Forskarpatent I Uppsala ABInventors: Claes-Göran Granqvist, Andris Azens, Joakim Karlsson, Gunnar Niklasson, Arne Roos
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Publication number: 20050238550Abstract: Pollutant decomposition device, including at least one outer transparent sheet and at least one inner transparent sheet being arranged such that a gap is formed between them and such that the gap is in communication with a surrounding gaseous composition on one side of the device such that the gaseous composition can pass through the gap. The device further including a photocatalyst arranged in the gap for depolluting the gaseous composition that pass through the gap. To obtain optimum decomposition efficiency the outer transparent sheet has a high degree of ultraviolet transmittance compared with the inner transparent sheet.Type: ApplicationFiled: March 20, 2003Publication date: October 27, 2005Inventors: Claes-Goran Granqvist, Sten-Eric Lindqvist
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Publication number: 20040234822Abstract: Electrochromic film with the general formula: ApBqOxXy wherein: -A is one or more of the elements from the group consisting of Ni, Ir, Cr, V, Mn, Fe, W, Mo, Ti, Co, Ce, Pr and Hf; —B is one or more of the elements from the group consisting of Mg, Ca, Sr, Ba, Nb, Al, Zr, Ta and Si; —O is oxygen; —X is an element from the group consisting of: H, F and N; and the ratio q/p is greater than 0.2 and less than 3.5, x is greater than 0.5(p+q) and less than 5(p+q), and y is equal to or greater than 0 and less than 2×. The film may further comprise an amount of Li, Na or K. The invention further relates to an electrochromic device comprising at least one layer of said electrochromic film.Type: ApplicationFiled: July 13, 2004Publication date: November 25, 2004Inventors: Andris Azens, Claes-Goran Granqvist, Richard Karmhag, Jan Isidorosson, Esteban Damian Avendano Soto
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Publication number: 20030233172Abstract: The invention relates to a climate control system comprising at least one radiation reducer and a climate control unit for controlling the radiation reducer. Which system further comprises a usage detection system coupled to the climate control unit. It also relates to a method of climate control in a room, using a climate control system comprising at least one radiation reducer, which method comprises the steps of detecting if the room is in use or not, if in use, setting the radiation reducer in a mode of high transmittance, if not in use, setting the radiation reducer in a mode of low transmittance.Type: ApplicationFiled: March 4, 2003Publication date: December 18, 2003Inventors: Claes-Goran Granqvist, Andris Azens, Joakim Amorim, Gunnar Niklasson, Arne Roos
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Patent number: 6500287Abstract: The present invention discloses a color-modifying method, which comprises the provision of a metal oxide thin film (14) based on Ni and/or Cr. The method is characterized in that, when coloring the metal oxide film (14), exposing the metal oxide thin film to ozone, and when bleaching the metal oxide film, exposing the metal oxide film to UV radiation (18). A lamination process or a deposition of another thin film may follow the exposure. Preferably, exposing the metal oxide thin film (14) to ultraviolet radiation (18) in an oxygen-containing atmosphere (20) provides the ozone exposure and exposing the metal oxide thin film to ultraviolet radiation (18) in an oxygen-free atmosphere (20) provides the ultraviolet exposure.Type: GrantFiled: October 12, 2000Date of Patent: December 31, 2002Assignee: Forskarpatent I Uppsala ABInventors: Andris Azens, Claes Goran Granqvist, Lisen Kullman
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Patent number: 6211995Abstract: An electrochromic device (10) for windows, displays, rear view mirrors, eye wear and other applications includes three layers (2), (4) and (5) of electrochromic materials and an electrolyte, with the transmittance of the layers (2) and (5) being variable by an applied electrical field, and protective layer (4) being transparent and not contributing to the coloration/bleaching of device. The protective layer (4) is made of the same electrochromic material as the electrochromic layer on the opposing side of the electrolyte.Type: GrantFiled: December 17, 1998Date of Patent: April 3, 2001Assignee: Forkarpatent 1 Uppsala ABInventors: Andris Azens, Guntars Vaivars, Monica Veszelei, Lisen Kullman, Claes-Goran Granqvist