Patents by Inventor Petrus G.M. Centen

Petrus G.M. Centen 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: 6542188
    Abstract: In a method of generating red, green and blue color signals, the red, green and blue color signals are picked up by red, green and blue color sensors each having a horizontal read-out register, while first n-phase clock signals (&phgr;C1, &phgr;C2, &phgr;C3), generated (DEL) from a pixel clock signal (f), are processed (MUX-G) to obtain second n-phase clock signals (&phgr;C1(G), &phgr;C2(G), &phgr;C3(G)) for the read-out register of the green color sensor in order to obtain an electronic half pixel offset for the green color signal with respect to the red and blue color signals.
    Type: Grant
    Filed: September 9, 1998
    Date of Patent: April 1, 2003
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Nicolaas J. Damstra, Petrus G.M. Centen
  • Patent number: 5784103
    Abstract: It is known to adjust the width/height ratio (aspect ratio) in charge coupled imaging devices in that a number of columns may or may not be used on either side of the imaging matrix. It is possible in this manner, for example, to reduce the aspect ratio to 4/3 starting from a device with an aspect ratio of 16/9 corresponding to a widescreen TV. Practice has shown that this reduction in the width impairs the quality of the imaging device in the 4/3 mode. According to an aspect of the invention, an FT device with an aspect ratio of 4/3 is used and operated as a 4-phase CCD in the 4/3 mode. To obtain the 16/9 aspect ratio, the height of the device is reduced in that selected lines are not used. For this purpose, the sensor matrix is operated as a 3-phase CCD, whereby the number of lines in vertical direction is increased.
    Type: Grant
    Filed: February 16, 1995
    Date of Patent: July 21, 1998
    Assignee: U.S. Philips Corporation
    Inventors: Gregory E. Pine, Pieter P. Brouwer, Petrus G. M. Centen, Holger Stoldt, Albert J. P. Theuwissen
  • Patent number: 5739855
    Abstract: In a camera including an image sensor (4R, 4G, 4B) having a sampling frequency (fs), and an optical low-pass filter arrangement arranged in an optical path with the image sensor (4R, 4G, 4B), the optical low-pass filter arrangement comprises a first birefringent optical filter element having a frequency response with a frequency trap point at the sampling frequency (fs) of the image sensor (4R, 4G, 4B), and a second birefringent optical filter element having a frequency response with a first frequency trap point at two thirds of the sampling frequency (fs) of the image sensor (4R, 4G, 4B), and a second frequency trap point at twice the sampling frequency (fs) of the image sensor (4R, 4G, 4B).
    Type: Grant
    Filed: December 20, 1995
    Date of Patent: April 14, 1998
    Assignee: U.S. Philips Corporation
    Inventors: Petrus G. M. Centen, Franciscus P. Van De Weegen, Pieter P. Brouwer
  • Patent number: 5554944
    Abstract: In a sampling circuit including a first main terminal (P) and a series coupling of a hold capacitor (C2) and a sampling switch (S2) between the first main terminal (P) and a second main terminal (E), a parallel circuit (L2, R4) of a coil and a resistor (L2) is coupled in series with the sampling switch (S2) and the hold capacitor (C2), whereby the combination of the coil (L2), the resistor (R4) and the hold capacitor (C2) generate an excitation within a time period in which the sampling switch (S2) is conductive.
    Type: Grant
    Filed: June 28, 1995
    Date of Patent: September 10, 1996
    Assignee: U.S. Philips Corporation
    Inventors: Marinus C. W. Van Buul, Petrus G. M. Centen