Patents by Inventor Hjalmar Huitema

Hjalmar Huitema 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: 20080043010
    Abstract: A display employs an arrangement of a matrix of pixels (30), and a column driving circuit (10) including an array of fixed level data drivers (30) for generating a drive waveform that is applied to the matrix of pixels (30) during an image update period. A power supply (VPS) for each fixed level data driver (11) is set to a base voltage (V0) during a first phase (P1) of a driving portion (DP) of the image update period, and the power supply (VPS) of each fixed level data driver (11) is switched from the base voltage (V0) to a transitional voltage (V1) in response to a transition from the first phase (P1) of the driving portion (DP) to a second phase (P2) of the driving portion (DP). The base voltage (V0) will either be less than or greater than the transitional voltage (V1).
    Type: Application
    Filed: November 14, 2005
    Publication date: February 21, 2008
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.
    Inventors: Hjalmar Huitema, Guofu Zhou
  • Publication number: 20070222921
    Abstract: An electronic device (10) comprises a substrate (100) carrying a single electrode structure (120) and a plurality of electro-optical elements (140; 160, 180). The plurality of electro-optical elements (140, 160, 180) at least includes a first electro-optical element (140) covering a first part of the electrode structure (120), the first electro-optical element (140) comprising a first electrooptical material with a first transmission/voltage response characteristic and a second electro-optical element (160) covering a second part of the electrode structure (120), the second electro-optical element (160) comprising a second electro-optical material with a second transmission/vokage response characteristic. Consequently, the various electro-optical elements (140; 160 180) can be individually controlled with a single electrode structure by applying variable voltages.
    Type: Application
    Filed: December 17, 2004
    Publication date: September 27, 2007
    Applicant: KONINKLIJKE PHILIPS ELECTRONIC, N.V.
    Inventors: Stephen Klink, Dirk Broer, Hjalmar Huitema, Joost Vogels, Roel Penterman
  • Publication number: 20070146575
    Abstract: A method is provided of producing an active matrix display device having an optical layer comprising a mixture of an electro-optical material and a polymer precursor. An upper layer of the active plate is processed in dependence on a difference between the transmission or reflection characteristics of the row and column conductors and of the pixel electrodes, thereby to process the upper layer in dependence on the row and column pattern or the pixel electrode pattern. The optical layer is then exposed from above the substrate to a stimulus for polymerizing the polymer precursor into a discrete polymer surface layer, thereby enclosing the electro-optical material between the polymerized material and the active plate to define display pixels. Enclosed bodies of electro-optical material defining display pixels are defined in a pattern defined by the processing of the upper layer.
    Type: Application
    Filed: November 17, 2004
    Publication date: June 28, 2007
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Joost Vogels, Dirk Broer, Hjalmar Huitema, Stephen Klink, Hendrik De Koning, Roel Penterman
  • Publication number: 20070126951
    Abstract: The present invention discloses an electronic device (100) comprising a substrate (10) carrying an electrode structure (12); an electro-optical stack (90) at least partially covering the electrode structure (12), the electro-optical stack comprising a stratified polymer layer (44), a further substrate (20) and an electro-optical material (32) sandwiched between the polymer layer (44) and the further substrate (20); and an adhesive layer (60) between the substrate (10) and the electro-optical stack, as well as a method for producing such an electronic device (100), in which the electro-optical stack (90) and the substrate (10) are prepared in separate processes and combined by an adhesive layer (60). This improves the yield of such an electronic device (100), because a production error in one of the components no longer leads to the loss of the whole electronic device (100).
    Type: Application
    Filed: December 17, 2004
    Publication date: June 7, 2007
    Applicant: KONINKLIJKE PHILIPS ELECTRONIC, N.V.
    Inventors: Joost Vogels, Dirk Broer, Hjalmar Huitema, Roel Penterman, Stephen Klink
  • Publication number: 20070120813
    Abstract: Display units (1) comprise display panels (90) which are divided into active parts and inactive parts. The driving of an entire display panel (90) requires a minimum amount of time, which amount of time increases with an increasing number of rows and columns. By providing data signals to the pixels (11) located in active parts, and by supplying reference signals simultaneously to pixels (11) located outside the active parts, most of an amount of time available in a frame period is used for the active part, and, for a given frame period, the number of rows and columns of the display panel (90) can be increased. Respective parts are made active during respective 3 periods. A part may comprise a group of columns (ADG, BEH, CFI) and/or a group of rows (ABC, DEF, GHI). The display panel (90) may comprise multiplexing circuitry (50) and/or shift register circuitry (60) to reduce the number of connections between the display panel (90) and the rest of the display unit (1).
    Type: Application
    Filed: September 21, 2004
    Publication date: May 31, 2007
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Hjalmar Huitema, Leendert Hage
  • Publication number: 20070115572
    Abstract: A device such as a flexible LCD is described comprising first and second layers wherein the first layer is a flexible substrate and the second layer is a brittle ITO conduction line applied to the substrate. The ITO layer is substantially flat and meanders across the plane of the flexible substrate so as to prevent fracture of the ITO layer when the flexible substrate is deformed. The ITO layer may be subdivided into portions, the length of the portions being selected to prevent fracture when the flexible substrate is deformed to a predetermined radius of curvature.
    Type: Application
    Filed: September 30, 2004
    Publication date: May 24, 2007
    Applicant: KONINKLJKE PHILIPS ELECTRONICS N.V.
    Inventors: Dirkjan Van Dam, Petrus Bouten, Gerwin Gelinck, Hjalmar Huitema, Bas Van Rens
  • Publication number: 20070081107
    Abstract: An active matrix display device has an optical layer (7,9,11) comprising a mixture of an electro-optical material and a polymer precursor. An upper surface of the active plate comprises an array of wells (70) such that the upper surface has higher (72) and lower regions, and the optical layer mixture is provided over the active plate. The optical layer is exposed to a stimulus for polymerizing the polymer precursor into a polymer layer constituted by a top surface (9) and by side walls (11), thereby enclosing the electro-optical material between the polymerized material and the active plate to define display pixels. Enclosed bodies of electro-optical material defining display pixels are thus provided over the lower regions. This method uses the processing of the active plate to define wells (70) which provide a height difference which can be used to provide alignment of enclosed display pixels cells. This avoids the need for an alignment mask during the deposition and exposure of the optical layer.
    Type: Application
    Filed: November 1, 2004
    Publication date: April 12, 2007
    Inventors: Hjalmar Huitema, Roel Penterman, Joost Vogels, Stephen Klink, Hendrik De Koning, Dirk Broer
  • Publication number: 20060262266
    Abstract: The electronic device (1) of the present invention has a carrier (10) with a plurality of discrete electro-optical elements (110, 130, 150) mounted on the surface of the carrier (10). The electro-optical elements (110, 130, 150), which cover respective parts of the electrode structure (12) on the surface of the carrier (10), each have a polymer layer (114, 134, 154), which encloses an electro-optical material (102, 122, 142) between the polymer layer (114, 134, 154) and the surface of the carrier (10). The discrete electro-optical elements (110, 130, 150) have been formed by the individual deposition of discrete droplets of a liquid comprising the electro-optical material and a polymer precursor followed by exposure of the droplets to a stimulus triggering the polymerization of the polymer precursor.
    Type: Application
    Filed: June 25, 2004
    Publication date: November 23, 2006
    Inventors: Joost Vogels, Paulus Duineveld, Stephen Klink, Roel Penterman, Dirk Broer, Hjalmar Huitema, Jan Van Der Putten, Marc Op De Beeck
  • Publication number: 20060223218
    Abstract: Provided is a method of manufacturing a field effect transistor with an organic semiconductor, and particularly a device comprising a plurality of field effect transistors with an interconnect structure. Herein, use is made of three photolithographical masks for four layers. Thereto, the transistor is provided in a top-gate structure, and the organic semiconductor layer (307) and the dielectric layer (309) are structure and patterned together. The semiconductor layer (307) and the dielectric layer (309) may be removed from areas not associated with field effect transistors (300) or with crossing conductors of the first and second conductor layer (303, 305, 501).
    Type: Application
    Filed: May 13, 2004
    Publication date: October 5, 2006
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Hjalmar Huitema, Bart-Hendrik Huisman
  • Publication number: 20060209039
    Abstract: A portable device is provided having a touch sensitive display (100) comprising an active matrix display element (101) and a touch sensitive element (103). The touch sensitive element (103) is disposed on the viewer distal side of the active matrix display element (101) thereby not affecting the display properties. The touch sensitive element (103) comprises a first and second conductive layer (113, 115) each having a plurality of conductors. The conductive layers (113, 115) sandwich a pressure sensitive layer (117) which modifies an electrical conductivity between two conductors of the two conductive layers (113, 115) in response to a pressure point resulting from an applied pressure. Thus, accurate position detection is achieved. The conductors may be aligned with the active matrix and the requirement for calibration may be obviated.
    Type: Application
    Filed: July 8, 2004
    Publication date: September 21, 2006
    Inventors: Galileo Destura, Hjalmar Huitema, Martinus Hermanus Wilhelmus Van Delden, Jozef Van Beek, Antonius Lucien Kemmeren
  • Publication number: 20060192729
    Abstract: A matrix array display device (100) is mounted on a flexible substrate (110) such as a polyimide substrate, and has a plurality of first conductors (120) crossing a plurality of second conductors (130), with a plurality of pixels (140) being located in the vicinity of a crossing between a first conductor (120) and a second conductor (130). The display device (100) includes a flexible shift register (150) and an optional further flexible shift register (160) for addressing the first conductors (120). The flexible shift register (150), which preferably is realized using organic semiconductor materials, occupies a smaller area of the flexible substrate (110) than for instance a bus structure, thus increasing the effective display area of the display device (100).
    Type: Application
    Filed: August 12, 2004
    Publication date: August 31, 2006
    Inventors: Eugenio Cantatore, Gerwin Gelinck, Hjalmar Huitema, Dagobert De Leeuw, Bas Van Rens
  • Publication number: 20060192726
    Abstract: A (display) device (31,4,5) contains multiple panels (3,7) like e.g. displays. Every display can be used to display its own content and can be rolled out of a sub-housing (5) like e.g. a cartridge separately. In different configurations the same cartridge can be arranged in such a way that the panels are used for a separate functionality or multiple display panels form one big screen.
    Type: Application
    Filed: March 26, 2004
    Publication date: August 31, 2006
    Applicant: KONINKLJKE ELECTRONICS N.V.
    Inventors: Hjalmar Huitema, Eugenio Cantatore, Gerwin Gelinck, Bas Van Rens
  • Publication number: 20060145994
    Abstract: A display system is provided with means to determine (14,15) and to display a remaining lifetime or other physical properties of a display device of said display system to signal the need for replacement.
    Type: Application
    Filed: June 15, 2004
    Publication date: July 6, 2006
    Applicant: Koninklijke Philips Electronics N.V.
    Inventors: Hjalmar Huitema, Bas Van Rens, Gerwin Gelinck
  • Publication number: 20060139334
    Abstract: TFTs (10) within a display device (1) are intentionally made sensitive to radiation from an external light source (12), for example by making a pin-hole (34) in the socalled black-matrix layer (33). The voltage across the pixel (8) or sensing this voltage drop just before refreshing the pixel content during 5 the next refresh cycle, it is possible to distinguish between an intentionally illuminated pixel (8) or pixel patterns (37, 38) and a non-illuminated pixel (8).
    Type: Application
    Filed: January 29, 2004
    Publication date: June 29, 2006
    Inventors: Martinus Van Delden, Andrea Giraldo, Hjalmar Huitema
  • Publication number: 20060109391
    Abstract: A gray level compensation mechanism is proposed for flexible displays. Flexible displays exhibit cell gap variations upon bending. The cell gap is measured during operation of the display (capacitive, poezoelectric). The pixel voltage is adjusted according to the measured cell gap. This results in a gray level that is independent of the local bending radius.
    Type: Application
    Filed: August 8, 2003
    Publication date: May 25, 2006
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Hjalmar Huitema, Peter Cirkel
  • Publication number: 20060071919
    Abstract: A system comprises a display (1) with a substrate (16) and a carrier (2). The display (1) comprises pixels (11) and display conductors (12) which supply display signals (DS) to the pixels (11). The carrier (2) comprises carrier conductors (20) for carrying input signals (IS). The display conductors (12) and the carrier conductors (20) are positioned with respect to each other to obtain capacitors (C) between corresponding ones of the display conductors (12) and the carrier conductors (20) to capacitively transfer the input signals (IS) on the carrier conductors (20) to the display conductors (12).
    Type: Application
    Filed: December 3, 2003
    Publication date: April 6, 2006
    Applicant: Kononklijke Philips Electronics N.V.
    Inventors: Hjalmar Huitema, Peter Cirkel, Eugenio Cantatore