Patents by Inventor David J. Cammenga

David J. Cammenga 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: 9563071
    Abstract: A laser system is configured to form at least one laser induced channel in a substrate and includes a laser and a laser path. The laser produces a laser beam, and the laser path includes an optical assembly that receives the laser beam and emits a conditioned laser beam. The optical assembly is configured to emit the conditioned laser beam with a substantially uniform focal energy distribution in a focal region defined along the direction of propagation. An apparatus includes a laser induced channel edge with a plurality of laser induced channels spanning some or all of the thickness of the substrate, which can be greater than 4 mm.
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: February 7, 2017
    Assignee: GENTEX CORPORATION
    Inventors: Kurtis L. Geerlings, Donald L. Bareman, Henry A. Luten, Niels A. Olesen, David J. Cammenga
  • Publication number: 20170010513
    Abstract: An electro-optic assembly is disclosed. The assembly comprises a front substrate having a first surface and a second surface substantially parallel to the first surface; a rear substrate spaced from and substantially parallel to the front substrate. The rear substrate comprises a third surface and a fourth surface substantially parallel to the third surface. The assembly further comprises an electrical contact for providing an electrical connection to an electrode in proximity to an electro-optic material and an appliqué layer. The appliqué layer is on at least a portion of the fourth surface and forms a contact-obscuring.
    Type: Application
    Filed: September 20, 2016
    Publication date: January 12, 2017
    Inventors: David J. Cammenga, Adam R. Heintzelman, Joel A. Stray, Autumn W. Trombka
  • Patent number: 9529214
    Abstract: An electro-optic element comprises a first substrate, including first and second surfaces. The first substrate contains at least a first layer of electrically conductive material that is deposited on the second surface and is substantially transparent. The element also comprises a second substrate including third and fourth surfaces, the second substrate containing a second layer of electrically conductive material deposited on the third surface. The first and second substrates are disposed in a parallel and spaced-apart relationship to define a gap between the second and third surfaces, the gap containing an electro-optic medium, and each substrate with a width and a height such that the ratio of width to height is less than or equal to 2. In addition, the element is configured such that a relative darkening timing factor substantially across the element is less than a factor of 3.
    Type: Grant
    Filed: October 10, 2014
    Date of Patent: December 27, 2016
    Assignee: GENTEX CORPORATION
    Inventors: George A. Neuman, Kevin B. Kar, John S. Anderson, William L. Tonar, David J. Cammenga, Gary J. Dozeman
  • Publication number: 20160370586
    Abstract: An electro-optic assembly configured to be operably connected to a heads up display system of a vehicle is provided that includes a first substrate with a first surface, a second surface, and a second substrate with a third surface and a fourth surface. The first substrate and the second substrate are configured to be held in a parallel spaced apart relationship and sealed around a perimeter of the first and second substrates. An antireflection coating is positioned on the third surface of the second partially reflective, partially transmissive substrate. A transflective coating is positioned on at least one of the first and second surfaces and an electrochromic medium is positioned between the second surface of the first substrate and the third surface of the second substrate. The electro-optic assembly is configured to reflect an image from a projector of the heads up display system of the vehicle.
    Type: Application
    Filed: June 16, 2016
    Publication date: December 22, 2016
    Inventors: Mario F. Saenger Nayver, George A. Neuman, David J. Cammenga
  • Patent number: 9488892
    Abstract: An electro-optic assembly that includes a front substrate having a first surface and a second surface substantially parallel to the first surface; a rear substrate spaced from and substantially parallel to the front substrate, and having a third surface and a fourth surface substantially parallel to the third surface; and a carrier operably connected to at least one of the front substrate and the rear substrate. Further, the electro-optic assembly includes an appliqué layer directly on at least a first portion of the fourth surface and having an opening over a second portion of the fourth surface; and an assembly component that is coupled to the carrier, behind the fourth surface and substantially coincident with the opening. The portions of the fourth surface are in a transmissive region of the rear substrate, and the front and rear substrates define a cavity at least partially filled with an electro-optic material.
    Type: Grant
    Filed: January 8, 2014
    Date of Patent: November 8, 2016
    Assignee: GENTEX CORPORATION
    Inventors: David J. Cammenga, Adam R. Heintzelman, Joel A. Stray, Autumn W. Trombka
  • Publication number: 20160266458
    Abstract: A window system is provided that includes an electro-optic element having a first substantially transparent substrate defining first and second surfaces. The second surface has a first electrically conductive layer and a second substantially transparent substrate defines third and fourth surfaces. The third surface has a second electrically conductive layer and a primary seal disposed between the first and second substrates. The seal and the first and second substrates define a cavity therebetween. An electro-optic medium is disposed in the cavity that is variably transmissive such that the electro-optic element is operable between substantially clear and darkened states. A polymeric dust cover is positioned away from the electro-optic element defining at least two major surfaces and at least one indicia disposed in the dust cover. The indicia includes a plurality of damage channels having an aspect ratio greater than about 10:1.
    Type: Application
    Filed: March 9, 2016
    Publication date: September 15, 2016
    Applicant: Gentex Corporation
    Inventors: Kurtis L. Geerlings, David J. Cammenga
  • Patent number: 9434312
    Abstract: A rearview mirror assembly is provided that includes a front substrate comprising a first surface and a second surface; and a rear substrate comprising a third surface and a fourth surface. The rear substrate defines at least one contact via and the front substrate and the rear substrate define a cavity. The mirror assembly further includes a perimeter seal between the front substrate and the rear substrate; and an electrically conductive element at least partially within said at least one contact via that electrically connects with at least one of the second surface and the third surface. The mirror assembly also includes an electro-optic medium disposed in the cavity. In addition, the front substrate and the rear substrate each has a shaped edge having a continuously arcuate shape. The shaped edges can also be formed by grinding the edges together.
    Type: Grant
    Filed: October 1, 2014
    Date of Patent: September 6, 2016
    Assignee: GENTEX CORPORATION
    Inventors: David J. Cammenga, William L. Tonar, Adam R. Heintzelman, Autumn W. Trombka, Gary J. Dozeman
  • Publication number: 20160193963
    Abstract: Anisotropic film laminates for use in image-preserving reflectors such as rearview automotive mirror assemblies, and related methods of fabrication. A film may comprise an anisotropic layer such as a light-polarizing layer and other functional layers. The film having controlled water content is heated under omnidirectional pressure and vacuum to a temperature substantially equal to or above a lower limit of a glass-transition temperature range of the film so as to be laminated to a substrate. The laminate is configured as part of a mirror structure so as to increase contrast of light produced by a light source positioned behind the mirror structure and transmitted through the mirror structure towards a viewer. The mirror structure is devoid of any extended distortion and is characterized by SW and LW values less than 3, more preferably less than 2, and most preferably less than 1.
    Type: Application
    Filed: December 28, 2015
    Publication date: July 7, 2016
    Inventors: John S. Anderson, William L. Tonar, Henry A. Luten, George A. Neuman, Gary J. Dozeman, Tammy G. Morgan, David J. Cammenga
  • Patent number: 9354470
    Abstract: An emissive display system includes an electro-optic device having a first substantially transparent substrate including first and second surfaces, at least one of which includes a first electrically conductive layer. A second substantially transparent substrate includes third and fourth surfaces, at least one of which includes a second electrically conductive layer. A primary seal is disposed around perimeter portions of the first and second substrates, which define a cavity therebetween. An electro-optic medium is disposed in the cavity and is variably transmissive such that the electro-optic device is operable between substantially clear and darkened states. A plurality of beads are disposed in a central portion of the cavity and are movable to a perimeter portion of the cavity. A substantially transparent light emitting display is disposed adjacent to the electro-optic device, which is in the darkened state when the light emitting display is emitting light.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: May 31, 2016
    Assignee: GENTEX CORPORATION
    Inventors: Kevin L. Ash, Sue F. Franz, Adam R. Heintzelman, David J. Cammenga
  • Publication number: 20160147126
    Abstract: An electro-optic assembly for use in a vehicle having a windshield is provided and includes a first arcuate substrate having a first surface with an anti-reflective coating and a second surface. A second arcuate substrate includes a third surface and a fourth surface with an anti-reflective coating. The first and second substrates are positioned such that the second and third surfaces are at least 0.1 mm apart. A seal is disposed between the first and second substrates and located substantially about a periphery of the electro-optic assembly. An electro-optic medium is positioned in a cavity defined by the first substrate, the second substrate, and the seal, the electro-optic medium including a refractive index greater than 1.2. The second surface is configured to receive and reflect incident light projected from a projector, thereby displaying information that appears to be displayed forward of the windshield.
    Type: Application
    Filed: November 20, 2015
    Publication date: May 26, 2016
    Inventors: David J. Cammenga, Christopher M. Derry, Bradley A. Bosma, George A. Neuman, Mario F. Saenger Nayver
  • Patent number: 9346402
    Abstract: The present invention relates to improved electro-optic rearview mirror elements and assemblies incorporating the same, including processes for making such elements and assemblies.
    Type: Grant
    Filed: April 29, 2015
    Date of Patent: May 24, 2016
    Assignee: GENTEX CORPORATION
    Inventors: William L. Tonar, David J. Cammenga, John S. Anderson, David L. Poll, George A. Neuman, Joel A. Stray, Bradley L. Busscher, Kenton J. Ypma
  • Publication number: 20160085129
    Abstract: An electro-optic element is provided that includes a first substrate having a first surface, and a second surface having a first electrically conductive portion disposed thereon. The element also includes a second substrate having a third surface, a fourth surface, and a second electrically conductive portion disposed on at least the third surface. A primary seal is between the second and third surfaces, wherein the seal and the second and third surfaces define a cavity. An electro-optic medium disposed in the cavity. In addition, the second surface further includes at least one indicia disposed thereon between the electro-optic medium and the second surface.
    Type: Application
    Filed: September 23, 2015
    Publication date: March 24, 2016
    Inventors: David J. Cammenga, Adam R. Heintzelman, Kurtis L. Geerlings
  • Patent number: 9254789
    Abstract: Anisotropic film laminates for use in image-preserving reflectors such as rearview automotive mirror assemblies, and related methods of fabrication. A film may comprise an anisotropic layer such as a light-polarizing layer and other functional layers. The film having controlled water content is heated under omnidirectional pressure and vacuum to a temperature substantially equal to or above a lower limit of a glass-transition temperature range of the film so as to be laminated to a substrate. The laminate is configured as part of a mirror structure so as to increase contrast of light produced by a light source positioned behind the mirror structure and transmitted through the mirror structure towards a viewer. The mirror structure is devoid of any extended distortion and is characterized by SW and LW values less than 3, more preferably less than 2, and most preferably less than 1.
    Type: Grant
    Filed: May 5, 2010
    Date of Patent: February 9, 2016
    Assignee: GENTEX CORPORATION
    Inventors: John S. Anderson, William L. Tonar, Henry A. Luten, George A. Neuman, Gary J. Dozeman, Tammy G. Morgan, David J. Cammenga
  • Patent number: 9134585
    Abstract: A vehicular rearview assembly that has a rounded outer perimeter edge to satisfy safety standards and contains an EC element having a complex peripheral ring, a front surface that is fully observable from the front of the assembly, and a user interface with switches and sensors that activate and configure, in cooperation with electronic circuitry of the assembly, pre-defined function(s) or device(s) of the assembly in response to the user input applied to the user interface. A complex peripheral ring may include multiple bands the structures of which is adapted to provide for specified optical characteristics of light, reflected off of the ring. Electrical communications between the electronic circuitry, the mirror element, and the user interface utilize connectors configured to exert a low contact force, onto the mirror element, limited in part by the strength of adhesive affixing the EC element to an element of the housing of the assembly.
    Type: Grant
    Filed: July 7, 2011
    Date of Patent: September 15, 2015
    Assignee: GENTEX CORPORATION
    Inventors: William L. Tonar, Mark D. Bugno, Mark R. Roth, David J. Cammenga, Danny L. Minikey, Jr., Joel A. Stray, George A. Neuman
  • Publication number: 20150239399
    Abstract: The present invention relates to improved electro-optic rearview mirror elements and assemblies incorporating the same, including processes for making such elements and assemblies.
    Type: Application
    Filed: April 29, 2015
    Publication date: August 27, 2015
    Inventors: William L. Tonar, David J. Cammenga, John S. Anderson, David L. Poll, George A. Neuman, Joel A. Stray, Bradley L. Busscher, Kenton J. Ypma
  • Patent number: 9056584
    Abstract: A vehicular rearview assembly with a mirror element having a curved or rounded edge on the first surface that is fully observable from the front of the assembly, a complex peripheral ring, and a user interface with switches and sensors that activate and configure pre-defined function(s) or device(s) of the assembly in response to the user input applied to the user interface. The mirror element is supported by a hybrid carrier co-molded of at least two materials, a portion of which is compressible between the housing shell and an edge of the mirror element. The peripheral ring may include multiple bands. Electrical communications between the electronic circuitry, the mirror element, and the user interface utilize connectors configured to exert a low contact force, onto the mirror element, limited in part by the strength of adhesive affixing the EC element to an element of the housing of the assembly.
    Type: Grant
    Filed: May 11, 2012
    Date of Patent: June 16, 2015
    Assignee: GENTEX CORPORATION
    Inventors: Richard T Fish, Jr., Danny L Minikey, Jr., Mark R Roth, David J Cammenga, George A Neuman, William L Tonar, Gary J Dozeman, Joel A Stray
  • Patent number: 9041998
    Abstract: The present invention relates to improved electro-optic rearview mirror elements and assemblies incorporating the same.
    Type: Grant
    Filed: January 27, 2014
    Date of Patent: May 26, 2015
    Assignee: GENTEX CORPORATION
    Inventors: William L. Tonar, David J. Cammenga, John S. Anderson, David L. Poll, George A. Neuman, Joel A. Stray, Bradley L. Busscher, Kenton J. Ypma
  • Publication number: 20150124308
    Abstract: An electro-optic element comprises a first substrate, including first and second surfaces. The first substrate contains at least a first layer of electrically conductive material that is deposited on the second surface and is substantially transparent. The element also comprises a second substrate including third and fourth surfaces, the second substrate containing a second layer of electrically conductive material deposited on the third surface. The first and second substrates are disposed in a parallel and spaced-apart relationship to define a gap between the second and third surfaces, the gap containing an electro-optic medium, and each substrate with a width and a height such that the ratio of width to height is less than or equal to 2. In addition, the element is configured such that a relative darkening timing factor substantially across the element is less than a factor of 3.
    Type: Application
    Filed: October 10, 2014
    Publication date: May 7, 2015
    Inventors: George A. Neuman, Kevin B. Kar, John S. Anderson, William L. Tonar, David J. Cammenga, Gary J. Dozeman
  • Patent number: D725561
    Type: Grant
    Filed: July 25, 2013
    Date of Patent: March 31, 2015
    Assignee: Gentex Corporation
    Inventors: Danny L. Minikey, Jr., Bradley R. Hamlin, Mark R. Roth, David J. Cammenga
  • Patent number: D739320
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: September 22, 2015
    Assignee: GENTEX CORPORATION
    Inventors: Danny L. Minikey, Jr., Bradley R. Hamlin, Mark R. Roth, David J. Cammenga