Patents by Inventor Amr Ghazala

Amr Ghazala 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).

  • Symmetric cancelling anti-striation circuit
    Patent number: 7486031
    Abstract: A striation correction circuit 300 is arranged to apply a first striation correction current to the first fluorescent lamp L1 and a second striation correction current to the second fluorescent lamp L2. A first voltage appearing across the first fluorescent tube L1 due to the first striation correction current is substantially similar in magnitude but has inverted polarity with respect to a second voltage across the second fluorescent tube L2 due to the second striation correction current. Detection of an end-of-life condition of a fluorescent lamp is facilitated.
    Type: Grant
    Filed: November 18, 2003
    Date of Patent: February 3, 2009
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Sree Venkit, Ramakrishnan Venkatraman, Amr Ghazala
  • Symmetric cancelling anti-striation circuit
    Publication number: 20060097666
    Abstract: A striation correction circuit 300 is arranged to apply a first striation correction current to the first fluorescent lamp L1 and a second striation correction current to the second fluorescent lamp L2. A first voltage appearing across the first fluorescent tube L1 due to the first striation correction current is substantially similar in magnitude but has inverted polarity with respect to a second voltage across the second fluorescent tube L2 due to the second striation correction current. Detection of an end-of-life condition of a fluorescent lamp is facilitated.
    Type: Application
    Filed: November 18, 2003
    Publication date: May 11, 2006
    Applicant: Koninklijke Philips Electronics N.V.
    Inventors: Sreeraman Venkitasubrahmanian, Ramakrishnan Venkatraman, Amr Ghazala