Patents by Inventor Gazi Akdag

Gazi Akdag 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).

  • LED lighting device with incandescent lamp color temperature behavior
    Patent number: 9253849
    Abstract: In a lighting device, sets of LEDs are employed using the natural characteristics of the LEDs to resemble incandescent lamp behavior when dimmed, thereby obviating the need for sophisticated controls. A first set of at least one LED produces light with a first color temperature, and a second set of at least one LED produces light with a second color temperature. The first set and the second set are connected in series, or the first set and the second set are connected in parallel, possibly with a resistive element in series with the first or the second set. The first set and the second set differ in temperature behavior, or have different dynamic electrical resistance. In various embodiments, the sum of the currents provided to the first and second sets may be substantially equal to a magnitude of an input current.
    Type: Grant
    Filed: October 25, 2013
    Date of Patent: February 2, 2016
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Berend Jan Willem Ter Weeme, William Peter Mechtildis Marie Jans, Theo Gerrit Zijlman, Gazi Akdag, Erik MartinusHubertus Petrus Van Dijk, Paul Johannes Marie Julicher, Bertrand Johan Edward Hontele
  • LED LIGHTING DEVICE WITH INCANDESCENT LAMP COLOR TEMPERATURE BEHAVIOR
    Publication number: 20140049189
    Abstract: In a lighting device, sets of LEDs are employed using the natural characteristics of the LEDs to resemble incandescent lamp behavior when dimmed, thereby Obviating the need for sophisticated controls. A first set of at least one LED produces light with a first color temperature, and a second set of at least one LED produces light with a second color temperature. The first set and the second set are connected in series, or the first set and the second set are connected in parallel, possibly with a resistive element in series with the first or the second set. The first set and the second set differ in temperature behavior, or have different dynamic electrical resistance. In various embodiments, the sum of the currents provided to the first and second sets may be substantially equal to a magnitude of an input current.
    Type: Application
    Filed: October 25, 2013
    Publication date: February 20, 2014
    Applicant: Koninklijke Philips N.V.
    Inventors: Berend Jan Willem TER WEEME, William Peter Mechtildis Marie JANS, Theo Gerrit ZIJLMAN, Gazi AKDAG, Erik Martinus Hubertus Petrus VAN DIJK, PAUL JOHANNES MARIE JULICHER, Bertrand Johan Edward HONTELE
  • LED lighting with incandescent lamp color temperature behavior
    Patent number: 8587205
    Abstract: In a lighting device, sets of LEDs are employed using the natural characteristics of the LEDs to resemble incandescent lamp behavior when dimmed, thereby obviating the need for sophisticated controls. A first set of at least one LED produces light with a first color temperature, and a second set of at least one LED produces light with a second color temperature. The first set and the second set are connected in series, or the first set and the second set are connected in parallel, possibly with a resistive element in series with the first or the second set. The first set and the second set differ in temperature behavior, or have different dynamic electrical resistance. The light device produces light with a color point parallel and close to a blackbody curve.
    Type: Grant
    Filed: March 11, 2010
    Date of Patent: November 19, 2013
    Assignee: Koninklijke Philips N.V.
    Inventors: Berend Jan Willem Ter Weeme, William Peter Mechtildis Marie Jans, Theo Gerrit Zijlman, Gazi Akdag, Erik Martinus Hubertus Petrus Van Dijk, Paul Johannes Marie Julicher, Bertrand Johan Edward Hontele
  • LED LIGHTING WITH INCANDESCENT LAMP COLOR TEMPERATURE BEHAVIOR
    Publication number: 20120134148
    Abstract: In a lighting device, sets of LEDs are employed using the natural characteristics of the LEDs to resemble incandescent lamp behavior when dimmed, thereby obviating the need for sophisticated controls. A first set of at least one LED produces light with a first color temperature, and a second set of at least one LED produces light with a second color temperature. The first set and the second set are connected in series, or the first set and the second set are connected in parallel, possibly with a resistive element in series with the first or the second set. The first set and the second set differ in temperature behavior, or have different dynamic electrical resistance. The light device produces light with a color point parallel and close to a blackbody curve.
    Type: Application
    Filed: March 11, 2010
    Publication date: May 31, 2012
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Berend Jan Willem Ter Weeme, William Peter Mechtildis Marie Jans, Theo Gerrit Zijlman, Gazi Akdag, Erik Martinus Hubertus Petrus Van Dijk, Paul Johannes Marie Julicher, Bertrand Johan Edward Hontele