Patents by Inventor Roel Van Woudenberg

Roel Van Woudenberg 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).

  • Publication number: 20080309656
    Abstract: A display device (500) having a plurality of picture cells (502) is controlled by adding a phase change to the regular cyclic inversion scheme. Thereby, it is possible to overcome the drawbacks of DC build-up due to, e.g., de-interlaced images and images comprising rotating symbols and “ticker tape”. The control involves receiving an image signal comprising image data relating to the picture cells. A respective electric field across each picture cell is controlled, in dependence on at least the image data, according to a first polarity inversion scheme where the polarity of the electric field is such that polarity inversion occurs at regular intervals, and according to a second polarity inversion scheme concurrent with said first polarity inversion scheme, where the polarity of the electric field such that polarity inversion occurs at pseudo-random intervals.
    Type: Application
    Filed: August 30, 2005
    Publication date: December 18, 2008
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.
    Inventors: Roel Van Woudenberg, Hendrikus Willem Groot Hulze, Gerben Johan Hekstra, Ramon Pascal Van Gorkom, Robertus Hendricus Maria Wubben
  • Publication number: 20080279470
    Abstract: The present invention relates to a method and a system of reducing motion blur in a liquid crystal cell. A basic idea of the invention is to process, in an LCD system, a luminance component (Y) of a picture frame to provide motion blur reduction, wherein overdrive is applied to the luminance component only. First, a luminance component related to a first picture frame is stored. Thereafter, a luminance component of a subsequent picture frame is acquired. To reduce motion blur in the LCD, a modified luminance component (Y?) is created based on a difference between the value of the luminance component of the subsequent frame and the value of the luminance component related to the first frame. Hence, based on the value of the difference in the luminance components, and color components (U,V) of the subsequent picture frame, a drive voltage is applied to the LC cell.
    Type: Application
    Filed: August 30, 2005
    Publication date: November 13, 2008
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Otto Leo Warmuth, Robert Tolkiehn, Roel Van Woudenberg
  • Patent number: 7427921
    Abstract: A system for generating an audible message to a human includes an apparatus having an input for receiving an audio message. The audio message is stored in a memory. An output may be used for rendering the audio message. The apparatus further includes a microphone and a controller. If a sound is received via the microphone, the controller causes the stored audio message to be rendered via the output.
    Type: Grant
    Filed: May 13, 2004
    Date of Patent: September 23, 2008
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Roel Van Woudenberg
  • Publication number: 20070252786
    Abstract: The invention provides for a method and display apparatus (10) having driving circuitry for driving a display panel (24) having a plurality of addressable discharge cells (26) driven by display pulses (DP), including the steps of applying data pulses (DAP) during the time interval between display pulses (DP) and characterized by the step of priming charges for each of the discharge cells (26) by means of the reset discharges so as to reduce the required data voltage, and in particular such a method wherein one TV-field period (TF) is divided into a plurality of sub-fields (SF) all of which are of substantially equal time durations.
    Type: Application
    Filed: April 11, 2007
    Publication date: November 1, 2007
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.
    Inventors: MAKOTO ISHII, TOMOKAZU SHIGA, SHIGEO MIKOSHIBA, JURGEN HOPPENBROUWERS, DIRK DE BRUIN, BART SALTERS, ROEL VAN WOUDENBERG, SIEBE DE ZWART, RUEDIGER LANGE
  • Publication number: 20070230296
    Abstract: A multi-layer record carrier and method of manufacturing thereof and recording thereon, includes data written in units of blocks on tracks of at least two information layers. A first guard field is written at the start of a data block and a second guard field is written at the end of the data block. The power in the focused spot in the deepest of the at least two information layers is maintained substantially at an optimal value, by setting the length of the first and second guard fields such that the end position of the second guard field of a preceding data block is located within the area of the first guard field of the succeeding data block. Thereby, gap portions between the first and second guard fields can be prevented.
    Type: Application
    Filed: April 2, 2007
    Publication date: October 4, 2007
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.
    Inventor: Roel Van Woudenberg
  • Patent number: 7277069
    Abstract: A display device (1) of the matrix type is addressed using partial line doubling, i.e. a method in which one or more sub-fields for pixels are doubled, meaning that the same data is used for a set of pixels. Adjacent pixels in a row are addressed using different grey level realizations by applying different combinations of subfields. Partial line doubling is performed on sets of adjacent pixels in a column that are addressed using the same grey level realization. Two different addressing schemes may be used by applying either the standard pattern A/B or the second pattern (n×1 A/B). When applying the latter pattern partial line doubling is performed in a line skipping fashion.
    Type: Grant
    Filed: July 18, 2002
    Date of Patent: October 2, 2007
    Assignee: Koninklijke Philips Electronics N. V.
    Inventors: Jurgen Jean Louis Hoppenbrouwers, Roy Van Dijk, Roel Van Woudenberg
  • Publication number: 20070222800
    Abstract: A colour electroluminescent, EL, display device comprising an array of pixels (11) each comprising sub-pixels (1) of two or more colours (R, G, B). For at least one of the colours (R, G, B), the pixel (11) comprises a first sub-pixel (RL, GL, BL) comprising a first EL material and a second sub-pixel (Rc, Gc, Bc) comprising a second EL material. The first EL material is of higher lifetime than the second EL material; the second EL material has better colour points and/or better colour rendition properties than the first EL material. In some embodiments a pixel comprises two red sub-pixels (RL, Rc), two green subpixels (GL, Gc) and two blue sub-pixels (BL, Bc), one sub-pixel of each colour (RL, GL, BL) comprising relatively high lifetime EL material and the other sub pixel of each colour (Rc, Gc, Bc) comprising relatively good colour points EL material. In other embodiments a pixel comprises two blue sub-pixels (BL, Bc) but only one red sub-pixel and one green sub-pixel.
    Type: Application
    Filed: April 15, 2005
    Publication date: September 27, 2007
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.
    Inventors: David Fish, Mark Childs, Nijs Van Der Vaart, Jurgen Hoppenbrouwers, Roel Van Woudenberg, Franciscus Budzelaar
  • Patent number: 7260822
    Abstract: The optical data storage medium (20) has a substrate (1) with a surface area having tracks (4) of marks representing stored information. The information is readable by means of a scanning radiation beam (10). A reflective layer (2) is present, reflecting the radiation beam (10). The medium has a radiation beam (10) reflection larger than 50%. The reflective layer (2) comprises a compound of the formula Al100-y,Xy, in which formula Al is aluminum and X is an element selected from the group of Ge and Si. The letter y is the atomic fraction of X in at. %. The value of y is in the range 5<y<35. The reflective layer (2) has a radiation beam absorption, which enables controlled ablative recording or solid-phase change recording of an identification mark (6, 6?).
    Type: Grant
    Filed: June 4, 2002
    Date of Patent: August 21, 2007
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Johannes Cornelis Norbertus Rijpers, Jan Johannes Van Den Broek, Hermanus Henricus Josephus Wilting, Roel Van Woudenberg
  • Publication number: 20070182672
    Abstract: An active matrix display comprises a select driver (SD) to drive select electrodes (SE), and a data driver (DD) to supply data (D) to data electrodes (DE). Pixels (10) are associated with intersections of the data electrodes (DE) and the select electrodes (SE). The pixels (10) comprise a light emitting element (L) and a pixel driving circuit (PD). The pixel driving circuit (PD) receives a power supply voltage (VB) via a power supply electrode (PE), and data (D) via a data electrode (DE) to control a brightness of the light emitting element (L). A power supply (PS) supplies the power supply voltage (VB). The power supply electrodes (PE) are arranged to supply the power supply voltage (VB) to the pixel driving circuits (PD) of lines of pixels (10) extending in the same direction as the select electrodes (SE) or in the same direction as the data electrodes (DE).
    Type: Application
    Filed: March 4, 2005
    Publication date: August 9, 2007
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.
    Inventors: Jurgen Hoppenbrouwers, Roel Van Woudenberg, Fransiscus Vossen
  • Patent number: 7215634
    Abstract: A multi-layer record carrier and method of manufacturing thereof and recording thereon, includes data written in units of blocks on tracks of at least two information layers. A first guard field is written at the start of a data block and a second guard field is written at the end of the data block. The power in the focused spot in the deepest of the at least two information layers is maintained substantially at an optimal value, by setting the length of the first and second guard fields such that the end position of the second guard field of a preceding data block is located within the area of the first guard field of the succeeding data block. Thereby, gap portions between the first and second guard fields can be prevented.
    Type: Grant
    Filed: November 26, 2001
    Date of Patent: May 8, 2007
    Assignee: Koninklijke Philips Electronics N. V.
    Inventor: Roel Van Woudenberg
  • Patent number: 7212178
    Abstract: The invention provides for a method and display apparatus (10) having driving circuitry for driving a display panel (24) having a plurality of addressable discharge cells (26) driven by display pulses (DP), including the steps of applying data pulses (DAP) during the time interval between display pulses (DP) and characterized by the step of priming charges for each of the discharge cells (26) by means of the reset discharges so as to reduce the required data voltage, and in particular such a method wherein one TV-field period (TF) is divided into a plurality of sub-fields (SF) all of which are of substantially equal time durations.
    Type: Grant
    Filed: May 30, 2002
    Date of Patent: May 1, 2007
    Assignee: Koninklijke Philips Electronics N. V.
    Inventors: Makoto Ishii, Tomokazu Shiga, Shigeo Mikoshiba, Jurgen Jean Louis Hoppenbrouwers, Dirk De Bruin, Bart Andre Salters, Roel Van Woudenberg, Siebe Tjerk De Zwart, Ruediger Johannes Lange
  • Patent number: 7177257
    Abstract: A predetermined synchronization pattern (40), a so-called VFO field, in, for example, the headers 3 of an information carrier, consists of sequences of 3T marks and spaces (41), of 8T marks and spaces (42) and of 5T marks and spaces (43). This sequence of patterns is advantageous for setting the dynamic range of an Automatic Gain Controlled (AGC) amplifier located within a device reading the information carrier.
    Type: Grant
    Filed: August 24, 2005
    Date of Patent: February 13, 2007
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Roel Van Woudenberg, Aalbert Stek
  • Patent number: 7178083
    Abstract: A device reads an information carrier that carries identification and user information. The identification information is arranged so as to be spread over the information carrier and includes data and parities. The device includes a reader for reading the information from the information carrier and error corrector correcting errors in the information. The device further includes an organizer for organizing the information in such a way that both the identification and user information can be processed by the error corrector.
    Type: Grant
    Filed: July 5, 2000
    Date of Patent: February 13, 2007
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Aalbert Stek, Roel Van Woudenberg
  • Publication number: 20070030155
    Abstract: A system for generating an audible message to a human includes an apparatus 100. The apparatus includes an input 120 for receiving an audio message. The audio message is stored in a memory 140. An output 150 can be used for rendering the audio message. The apparatus further includes a microphone 110 and a controller 130. If a sound is received via the microphone, the controller causes the stored audio message to be rendered via the output.
    Type: Application
    Filed: May 13, 2004
    Publication date: February 8, 2007
    Inventor: Roel Van Woudenberg
  • Publication number: 20060152452
    Abstract: The display device comprises a display panel (2) having a plurality of display pixels (4) with emissive display elements (11). The display device further comprises duty cycle control means (15, T3) for varying a fraction of the frame period during which the display pixels (4) emit light in dependence on an overall brightness level of an image to be displayed on the display panel. In order to vary the duty cycle a switch, e.g. a power transistor (T3) is connected between the drive transistor (T2) and the light emitting element (11) of each pixel (4) each pixel in a row may be connected to a single duty cycle select line (15).
    Type: Application
    Filed: July 1, 2004
    Publication date: July 13, 2006
    Inventors: Jurgen Hoppenbrouwers, Roel Van Woudenberg, Nijs Van Der Vaart
  • Patent number: 7027383
    Abstract: An optical data storage medium (1) is described. The medium (1) has an optically readable information layer with a first optical reflectivity. An annular zone (12), outside the user data recording area (2) has at least one first type (5) of sector provided with a permanent information mark (7), having a second optical reflectivity. The zone has at least one second type (6) of sector provided with a recordable identification mark (8), having a third optical reflectivity different from the first optical reflectivity. Thus, a hybrid bar code like structure, with both permanent and recordable information requiring little radial space, is provided. Further, methods to read such permanent information marks (7)/recordable identification marks (8) and to write such recordable identifications marks (8) are disclosed.
    Type: Grant
    Filed: September 4, 2002
    Date of Patent: April 11, 2006
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Roel Van Woudenberg
  • Publication number: 20060071881
    Abstract: A display device having a set of non-pixel-selective electrodes (1a, 1b) and a set of pixel-selective electrodes (2a, 2b, 2c), so that pixels (15) are defined by intersections of said electrodes. The display further comprises means (3, 4a, 4b, 5, 6, 7) for applying an amplitude modulated (AM) signal to a non-pixel-selective electrode (1a, 1b), and means (10a, 10b, 11, 13) for applying a pulse width modulated (PWM) signal to a pixel-selective electrode (2a, 2b, 2c). The voltage difference between the electrodes defines the light intensity which can be emitted, and the available intensity varies in time according to the AM signal. The width of the pulse on the pixel-selective electrode represents the duration of light emission, and thus the gray level of the corresponding pixel. The combination of the two generates an exponentially distributed emitted light intensity, enabling gamma correction.
    Type: Application
    Filed: December 10, 2003
    Publication date: April 6, 2006
    Applicant: Koninklijke Philips Electronics N.V.
    Inventors: Dirk De Bruin, Roel Van Woudenberg
  • Publication number: 20060061603
    Abstract: A method for driving pixels in a display device with an image signal is disclosed wherein the image signal comprises grey level information of an image to be rendered by the display device. The method comprises: dividing the image signal into sections, each section having a duration of a section period; dividing the section period into a plurality of adjacent, weighted sub-section periods; selecting for each of the pixels to be driven during the section period a sequence of adjacent sub-section periods in dependence on the grey level information, the selectable sequences lacking a common starting and ending point; driving the pixels during the sequences adjacent sub-section periods. The method may be applied to displays driven by a pulse width modulated signal, such as sub-field as well as sub-line operated displays including plasma display panels, dynamic foil displays and passive displays.
    Type: Application
    Filed: November 3, 2003
    Publication date: March 23, 2006
    Applicant: Koninklijke Philips Electronics N.V.
    Inventors: Derk Kort, Jeroen Van Velzen, Roel Van Woudenberg
  • Patent number: 7016288
    Abstract: A predetermined synchronization pattern (40), a so-called VFO field, in, for example, the headers 3 of an information carrier. The predetermined synchronization pattern contains a first part with marks having a first length of (d+1) times the channel bit length, and spaces having a second length of (d+1) times the channel bit length, and a second part with marks having a third length of (k+1) times the channel bit length and spaces having a fourth length of (k+1) times the channel bit length and a third part, which third part contains marks having a length of (k?d) times the channel bit length and spaces having a length of (k?d) times the channel bit length. This sequence of patterns is advantageous for setting the dynamic range of an Automatic Gain Controlled (AGC) amplifier located within a device reading the information carrier.
    Type: Grant
    Filed: February 24, 2004
    Date of Patent: March 21, 2006
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Roel Van Woudenberg, Aalbert Stek
  • Publication number: 20060055629
    Abstract: The present invention relates to the driving of optical displays, such as Dynamic Foil Displays, and provides dynamic adaptation of the number of subfields into which frame times of such displays are divided. The number of subfields can thus be selected (1202) depending on for example the ambient light conditions (1201) and image quality requirement. In particular, a smaller number of subfields facilitates brighter images, whereas a larger number of subfields facilitates an increased number of gray scales and/or motion artifact reduction.
    Type: Application
    Filed: December 4, 2003
    Publication date: March 16, 2006
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS , N.V.
    Inventor: Roel Van Woudenberg