Patents by Inventor Jeroen Hubert Christoffel Jacobus Stessen
Jeroen Hubert Christoffel Jacobus Stessen 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).
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Publication number: 20170054989Abstract: Because we needed a new improved and very different color encoding space for being able to faithfully encode the presently emerging high dynamic range video for good quality rendering on emerging HDR displays such as the SIM2 display, the video encoder (300) with an input (308) to obtain a video from a video source (301) wherein pixel colors are encoded in an (XYZ) color encoding, the video encoder comprising an opto-electronic conversion unit (304) arranged to convert the luminances (Y) of the pixel colors into lumas (Y?) with a predetermined code allocation function (F), characterized in that the video encoder comprises a chromaticity determination unit (310), which is arranged to encode chromaticities (u?,v?) of pixel colors with lumas (Y?) below a predetermined threshold luma (E?) with a mathematical chromaticity definition which yields a maximum encodable saturation (S_bL) for a particular hue for pixel colors with a luma below the predetermined threshold luma (E?) which is lower than a maximum encodableType: ApplicationFiled: February 12, 2015Publication date: February 23, 2017Inventors: Jeroen Hubert Christoffel Jacobus STESSEN, Renatus Josephus VAN DER VLEUTEN, Johannes Gerardus Rijk VAN MOURIK, Rutger NIJLAND
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Publication number: 20160366449Abstract: Because we needed a new improved and very different color encoding space for being able to faithfully encode the presently emerging high dynamic range video for good quality rendering on emerging HDR displays such as the SIM2 display, we present around that new color space various new decoders which allow simplified processing, in particular the handling of all achromatic direction (i.e. luminance) optimization separate from the chromatic processing, and increased quality of the reconstructed HDR images. This is realized by a video decoder (350) having an input (358) for receiving a video signal (S_im) transmitted over a video transmission system or received on a video storage product, in which pixel colors are encoded with an achromatic luma (Y?) coordinate and two chromaticity coordinates (u?,v?), the video decoder comprising a scaling unit (356) arranged to transform the chromaticity colors into a luminance-dependent chrominance color representation, by scaling with the achromatic luma.Type: ApplicationFiled: February 21, 2015Publication date: December 15, 2016Applicant: KONINKLIJKE PHILIPS N.V.Inventors: Jeroen Hubert Christoffel Jacobus STESSEN, Renatus Josephus VAN DER VLEUTEN, Johannes Gerardus Rijk VAN MOURIK, Rutger NIJLAND
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Patent number: 8203522Abstract: A method for driving an image display device having a backlight lamp and a display screen includes receiving an image data signal; and based the image data signal, calculating a content-related backlight control signal for the backlight lamp for setting the intensity of the backlight. The method further includes generating an average signal that represents a time-average of the power consumed by the backlight lamp; comparing the average signal with a reference signal; and based on the calculated content-related backlight control signal and taking into account the result of the comparison, generating an actual backlight control signal for the backlight lamp.Type: GrantFiled: April 26, 2007Date of Patent: June 19, 2012Assignee: Koninklijke Philips Electronics N.V.Inventors: Jeroen Hubert Christoffel Jacobus Stessen, Johannes Gerardus Rijk Van Mourik
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Patent number: 7986291Abstract: An apparatus (200) for driving a display (310, 320) including an array of display elements (20), each element (20) comprising a plurality of sub-pixels of red (R), green (G), blue (B) and white (W) colors. The apparatus (200) comprising a processor (300) operable: (a) to receive input signals (RI, GI, BI) for controlling red, green and blue colors of each element (20) of the display (320); (b) to process the input signals (RI, GI, BI) to generate corresponding red, green, blue and white output drive signals for the red (R), green (G), blue (B) and white (W) sub-pixels of each element (20), said output drive signals being enhanced according to a gain factor (HS) for increasing element luminosity subject to potential color saturation occurring at one or more of the elements (20) being addressed by selectively reducing color saturation at said one or more of said elements (20); and (c) to apply said output drive signals to respective sub-pixels (R; G, B, W) for each element (20) of the display (320).Type: GrantFiled: January 19, 2006Date of Patent: July 26, 2011Assignee: Koninklijke Philips Electronics N.V.Inventors: Johannes Gerardus Rijk Van Mourik, Jeroen Hubert Christoffel Jacobus Stessen
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Patent number: 7737937Abstract: A scanning backlight unit (BU) for a matrix display comprises a plurality of light sources (L1, . . . , Ln). A driver (2) supplies drive signals (D1, . . . , Dn) to the light sources (L1, . . . , Ln). A controller (3) controls the driver (2) to separately activate the light sources (L1, . . . , Ln) to obtain light-emitting regions (5) being active. A light sensor (4) is associated with a group of at least two of the light sources (L1, . . . , Ln) to supply a sensor signal (SES) which indicates a luminance (LU) of the group. The controller (3) reads the sensor signal (SES) at different instants (ts1, . . . , tsn) at which mutually different subsets of the light sources (L1, . . . , Ln) of the group are active to control the driver (2) to supply power levels to the light sources (L1, . . . , Ln) of the group to obtain a luminance (LU1, . . . , LUn) of each one of the light sources (L1, . . . , Ln) of the group in dependence on the sensor signal (SES).Type: GrantFiled: May 9, 2005Date of Patent: June 15, 2010Assignee: Koninklijke Philips Electronics N.V.Inventors: Nebojsa Fisekovic, Jeroen Hubert Christoffel Jacobus Stessen, Franciscus Johannes Stommels, Carsten Deppe, Ulrich Boeke, Peter Luerkens
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Patent number: 7659876Abstract: This invention relates to a method for driving a display panel (DP) having pixels (P). The display panel (DP) is driven with a sequence of image frames. The image frames are converted to a drive signal (V2) comprising refresh frames with a refresh frame period (TR) shorter than the image frame period. A pixel (P) of the display panel (DP) is driven with an adapted drive signal having a first polarity during a first group of refresh frame periods, and having a reversed polarity during a subsequent second group of refresh frame periods. The first group and the second group each comprise at least two refresh frame periods.Type: GrantFiled: July 21, 2005Date of Patent: February 9, 2010Assignee: Koninklijke Philips Electronics N.V.Inventors: Jeroen Hubert Christoffel Jacobus Stessen, Aleksandar Sevo
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Publication number: 20090115766Abstract: A method for driving an image display device (110) comprising at least one backlight lamp (111) and a display screen (112) is described. The method comprises the steps of: receiving an image data signal (D); on the basis of the image data signal (D), calculating a content-related backlight control signal (SCL(D)) for the backlight lamp (111) for setting the intensity of the backlight; generating an average signal (SAV) that represents a time-average of the power consumed by the backlight lamp (111); comparing the average signal (SAV) with a reference signal (SREF); on the basis of the calculated content-related backlight control signal (SCL(D)), taking into account the result of the said comparison, generating an actual backlight control signal (SCL(A)) for the backlight lamp (111).Type: ApplicationFiled: April 26, 2007Publication date: May 7, 2009Inventors: Jeroen Hubert Christoffel Jacobus Stessen, Johannes Gerardus Rijk Van Mourik
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Publication number: 20080259020Abstract: A scanning backlight unit (BU) for a matrix display comprises a plurality of light sources (L1, . . . , Ln). A driver (2) supplies drive signals (D1, . . . , Dn) to the light sources (L1, . . . , Ln). A controller (3) controls the driver (2) to separately activate the light sources (L1, . . . , Ln) to obtain light-emitting regions (5) being active. A light sensor (4) is associated with a group of at least two of the light sources (L1, . . . , Ln) to supply a sensor signal (SES) which indicates a luminance (LU) of the group. The controller (3) reads the sensor signal (SES) at different instants (ts1, . . . , tsn) at which mutually different subsets of the light sources (L1, . . . , Ln) of the group are active to control the driver (2) to supply power levels to the light sources (L1, . . . , Ln) of the group to obtain a luminance (LU1, . . . , LUn) of each one of the light sources (L1, . . . , Ln) of the group in dependence on the sensor signal (SES).Type: ApplicationFiled: May 9, 2005Publication date: October 23, 2008Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.Inventors: Nebojsa Fisekovic, Jeroen Hubert Christoffel Jacobus Stessen, Franciscus Johannes Stommels, Carsten Deppe, Ulrich Boeke, Peter Luerkens
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Publication number: 20080204480Abstract: An apparatus (200) for driving a display (310, 320) including an array of display elements (20), each element (20) comprising a plurality of sub-pixels of red (R), green (G), blue (B) and white (W) colors. The apparatus (200) comprising a processor (300) operable: (a) to receive input signals (RI, GI, BI) for controlling red, green and blue colors of each element (20) of the display (320); (b) to process the input signals (RI, GI, BI) to generate corresponding red, green, blue and white output drive signals for the red (R), green (G), blue (B) and white (W) sub-pixels of each element (20), said output drive signals being enhanced according to a gain factor (HS) for increasing element luminosity subject to potential color saturation occurring at one or more of the elements (20) being addressed by selectively reducing color saturation at said one or more of said elements (20); and (c) to apply said output drive signals to respective sub-pixels (R; G, B, W) for each element (20) of the display (320).Type: ApplicationFiled: January 19, 2006Publication date: August 28, 2008Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.Inventors: Johannes Gerardus Rijk Van Mourik, Jeroen Hubert Christoffel Jacobus Stessen
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Publication number: 20080094383Abstract: This invention relates to a method for driving a display panel (DP) having pixels (P). The display panel (DP) is driven with a sequence of image frames. The image frames are converted to a drive signal (V2) comprising refresh frames with a refresh frame period (TR) shorter than the image frame period. A pixel (P) of the display panel (DP) is driven with an adapted drive signal having a first polarity during a first group of refresh frame periods, and having a reversed polarity during a subsequent second group of refresh frame periods. The first group and the second group each comprise at least two refresh frame periods.Type: ApplicationFiled: July 21, 2005Publication date: April 24, 2008Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.Inventors: Jeroen Hubert Christoffel Jacobus Stessen, Aleksandar Sevo
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Patent number: 7190408Abstract: A TV-receiver 220 for receiving and decoding a broadcasted TV-signal representing an image and control data. The control data defines a vector indicating a location of a partition of important subject matter within the image. In addition an image display apparatus 200 and a TV-system comprising the TV-receiver and a method for operating the TV-receiver is described. The control data herein further defines the size of the partition showing the important subject matter and that the TV-receiver 220 further comprises a re-sampling unit being adapted to extract a re-sampled image to be displayed on the screen of a display device 200 from said decoded image by re-sampling said decoded image at a variable re-sampling rate defined at the receiving end such that the size of the partition of important subject matter in the re-sampled image is adapted according to a criterion.Type: GrantFiled: May 16, 2002Date of Patent: March 13, 2007Assignee: Koninklijke Philips Electronics N.V.Inventor: Jeroen Hubert Christoffel Jacobus Stessen
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Patent number: 7050114Abstract: The present invention relates to controlling contrast in at least part of a picture. The contrast control is performed by reducing the saturation (2–4) of the picture during contrast increase (1).Type: GrantFiled: April 8, 2002Date of Patent: May 23, 2006Assignee: Koninklijke Philips Electronics N.V.Inventors: Jeroen Hubert Christoffel Jacobus Stessen, Age Jochem Van Dalfsen
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Patent number: 7038721Abstract: A gamma correction circuit for correcting a digital video signal, the circuit comprising first (6) and second (8) lookup tables for storing discrete output intensity data and the associated slope data of a non-linear transfer function, respectively, for each of the discrete input video signal intensities, an adder (10) having a first input connected to the output of the first lookup table, a multiplier (12) having a first input connected to the output of the second look-up table (8), characterized by a quantizer (4) for providing the most significant bits of the incoming video signal to address the first (6) and second (8) lookup tables and to transfer the corresponding output intensity data to the adder (10) and the associated slope data to the multiplier (12), the quantizer (4) transmitting the remaining least significant bits of the input video signal to the second input of the multiplier (12), the multiplier (12) multiplying the slope data with the remaining least significant bits and feeding the multipliType: GrantFiled: February 15, 2002Date of Patent: May 2, 2006Assignee: Koninklijke Philips Electronics N.V.Inventors: Jeroen Hubert Christoffel Jacobus Stessen, Andrea Maccato, Mitchell Oslick
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Patent number: 6781636Abstract: A video apparatus includes a histogram modification means circuit for matching at least luminance signals (Y) for separate pixels to prescribed values. The histogram modification circuit has a first memory (3) with a first look-up table for correcting the video luminance signals (Y), and a second memory (4) with a second look-up table (4) for correcting the color-difference signals (U and V). The values within the second look-up table (4) are derived from the values in the first look-up table (3). Preferably, in order to obtain a distribution of a rounding-off error over a pixel's neighbor, each of the channels for the luminance (Y) and color-difference signals (U and V) includes a closed lsb (least significant bit) correction loop (14, 14′) with a quantizer (15, 15′) and a pixel memory (16, 16′), the input of the lsb correction loop being formed by the corrected luminance and corrected color-difference signals, respectively.Type: GrantFiled: March 9, 2001Date of Patent: August 24, 2004Assignee: Koninklijke Philips Electronics N.V.Inventor: Jeroen Hubert Christoffel Jacobus Stessen
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Publication number: 20040130664Abstract: The invention relates to a TV-receiver 220 for receiving and decoding a broadcasted TV-signal representing an image and control data wherein the control data defines a vector indicating a location of a partition of important subject matter within said image. The invention further relates to an image display apparatus 200 and to a TV-system comprising the TV-receiver and to a method for operating the TV-receiver. It is the object of the present invention to improve a known TV-receiver 220, an image display apparatus, a TV-system and a method for displaying an image such that at least a partition of important subject matter within the original broadcasted image can entirely be shown on a screen even if the size of said screen is smaller than the size of said partition with only a minimal loss of details.Type: ApplicationFiled: November 13, 2003Publication date: July 8, 2004Inventor: Jeroen Hubert Christoffel Jacobus Stessen
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Patent number: 6714258Abstract: A video apparatus includes a circuit for reducing noise in applied input video signals. The noise reducing circuit is provided with a temporal noise filter (S1, LUT, M), a down-sample unit (D) for obtaining a spatial down-sampling of video signals (Vi) of subsequent pixels, these down-sampled video signals being supplied to the temporal noise filter (S1, LUT, M), and an up-sample unit (U) for generating, in response to noise output signals obtained in the temporal noise filter (S1, LUT, M), noise signals of the pixels, and a subtractor (S2) for subtracting the noise signals from the respective input video signals (Vi).Type: GrantFiled: March 14, 2001Date of Patent: March 30, 2004Assignee: Koninklijke Philips Electronics N.V.Inventors: Jeroen Hubert Christoffel Jacobus Stessen, Gerard De Haan, Robert Jan Schutten, Fransiscus Wilhelmus Sijstermans
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Patent number: 6700626Abstract: A video-apparatus includes a peaking filter (3-5), which, in response to applied video signals, supplies peaking signals (Vp) that are combined with the applied video signals. The peaking filter (3-5) includes a first (3) and a second (4) 1st-first order high-pass or band-pass filter in cascade configuration, while a unit (5, 6) for determining the peaking strength is arranged between the first (3) and second (4) filters.Type: GrantFiled: March 15, 2001Date of Patent: March 2, 2004Assignee: Koninklijke Philips Electronics N.V.Inventors: Jeroen Hubert Christoffel Jacobus Stessen, Christian Hentschel, Michel Wouter Nieuwenhuizen
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Publication number: 20030156226Abstract: A gamma correction circuit for correcting a digital video signal, the circuit comprising first (6) and second (8) lookup tables for storing discrete output intensity data and the associated slope data of a non-linear transfer function, respectively, for each of the discrete input video signal intensities, an adder (10) having a first input connected to the output of the first lookup table, a multiplier (12) having a first input connected to the output of the second look-up table (8), characterized by a quantizer (4) for providing the most significant bits of the incoming video signal to address the first (6) and second (8) lookup tables and to transfer the corresponding output intensity data to the adder (10) and the associated slope data to the multiplier (12), the quantizer (4) transmitting the remaining least significant bits of the input video signal to the second input of the multiplier (12), the multiplier (12) multiplying the slope data with the remaining least significant bits and feeding the multipliType: ApplicationFiled: February 15, 2002Publication date: August 21, 2003Inventors: Jeroen Hubert Christoffel Jacobus Stessen, Andrea Maccato, Mitchell Oslick
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Publication number: 20030063221Abstract: The present invention relates to controlling contrast in at least part of a picture. The contrast control is performed by reducing the saturation (2-4) of the picture during contrast increase (1).Type: ApplicationFiled: April 8, 2002Publication date: April 3, 2003Inventors: Jeroen Hubert Christoffel Jacobus Stessen, Age Jochem Van Dalfsen
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Publication number: 20020027618Abstract: A video-apparatus comprises a peaking filter (3-5), which, in response to applied video signals, supplies peaking signals (Vp) that are combined with applied video signals. The peaking filter (3-5) includes a first (3) and a second (4) 1st first order high-pass or band-pass filter in cascade configuration, while a unit (5, 6) for determining the peaking strength is put between the first (3) and second (4) filters.Type: ApplicationFiled: March 15, 2001Publication date: March 7, 2002Inventors: Jeroen Hubert Christoffel Jacobus Stessen, Christian Hentschel, Michel Wouter Nieuwenhuizen