Patents by Inventor Andrea Giraldo

Andrea Giraldo 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: 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: 20060071879
    Abstract: A pixel cell in an active matrix display comprising a current driven emissive element such as an OLED (20) and a data input (17) for receiving an analogue data signal (Vin). The pixel has at least two drive elements (12, 14), each being connected to a power supply (16) and arranged to drive the emissive element in accordance with the data signal, and selecting means (22, 24) for providing, in response to a select signal (21, 23), the data signal to at least one of the drive elements (12, 14). Further, each drive element is adapted to drive the emissive element (20) in a different drive current range in response to a given data signal. Thereby, a required brightness range can be obtained while data voltages too close to the threshold voltage may be avoided.
    Type: Application
    Filed: November 27, 2003
    Publication date: April 6, 2006
    Inventors: Andrea Giraldo, Mark Johnson
  • Publication number: 20060038751
    Abstract: A matrix display device comprises an array of addressable pixels (10) each having a display element (20) and a control circuit for controlling the operation of the display element. The control circuit includes a charge storage capacitor (36) and a photosensitive device (40) coupled to the storage capacitor for regulating charge stored on the storage capacitor (36) in accordance with light falling on the photosensitive device (40). The control circuit further comprises means for independent voltage control (42) of a gate terminal of the photosensitive device (40), preferably a phototransistor. In this way a more efficient and flexible biasing of the phototransistor is possible. The means preferably comprise a second row line (42) being connected to the gate terminal of the photosensitive device (40). This additional line allows also the use of transistors of the same polarity for this type of pixel circuit, saving additional process masks (and costs).
    Type: Application
    Filed: August 8, 2003
    Publication date: February 23, 2006
    Inventors: Mark Johnson, Andrea Giraldo
  • Publication number: 20060015272
    Abstract: A method for sensing a light emissive element in an active matrix display pixel cell (20; 20?) further comprising a data line (21) connectable to a drive element (24) and to a first electrode (29) of the emissive element (25). The data line (21) is connected to the anode (29) of the emissive element (25), and a sensing voltage (V1) to reverse bias the emissive element (25), and detecting any leakage current (IL) flowing through the emissive element (25).
    Type: Application
    Filed: November 3, 2003
    Publication date: January 19, 2006
    Inventors: Andrea Giraldo, Mark Johnson
  • Publication number: 20050270279
    Abstract: The invention relates to an electroluminescent display comprising a first display pixel and a second display pixel formed on a substrate. The display pixels comprise a first electrode deposited on or across the substrate, an electroluminescent layer and a second reflective electrode. The first and second display pixels are separated by a region comprising at least one insulating structure. The insulating structure is adapted to suppress the output of light at the second display pixel reflected at the second reflective electrode, which light is incident from at least the first display pixel and/or the substrate. The insulating structure reduces crosstalk of light between the first and second or further display pixel and can be easily integrated in the manufacturing process of the electroluminescent display.
    Type: Application
    Filed: July 8, 2003
    Publication date: December 8, 2005
    Applicant: Koninklijke Philips Electronics N.V.
    Inventors: Andrea Giraldo, Mark Johnson
  • Publication number: 20050269950
    Abstract: The invention relates to an electroluminescent display comprising at least one display pixel, the display pixel comprising at least a substrate, a first electrode deposited on or across the substrate, an electroluminescent layer, and a second electrode. The display pixel further comprises at least one insulating structure within the display pixel adapted to enhance the light output from said display pixel. The light output enhancing structure can be used to generate images with different brightness levels.
    Type: Application
    Filed: July 8, 2003
    Publication date: December 8, 2005
    Applicant: Noninklijke Philips Electronics N.V.
    Inventors: Andrea Giraldo, Herbert Lifka, Mark Johnson
  • Publication number: 20050104823
    Abstract: Driving of a two-sided viewable display (a display that provides information on both sides) is performed by means of mirroring switching circuits Techniques for simultaneous (total or partial) view are also proposed.
    Type: Application
    Filed: February 12, 2003
    Publication date: May 19, 2005
    Inventors: Andrea Giraldo, Mark Johnson
  • Publication number: 20050093848
    Abstract: The invention relates to a passive addressed matrix display having a plurality of luminescent picture elements. Driving circuitry having means for selecting rows of pixel elements and means for driving pixels in a row is provided. A de-coupling means is connected to each picture element for preventing said picture element from charging/decharging when it is in a non-select state and a simultaneously driven picture element is in a select state.
    Type: Application
    Filed: January 10, 2003
    Publication date: May 5, 2005
    Inventors: Adrianus Sempel, Andrea Giraldo
  • Publication number: 20040164939
    Abstract: The invention relates to a display device comprising a plurality of light-emitting diodes (LEDs), which comprise at least one layer of an electroluminescent (EL) material sandwiched between electrodes, and driving means for driving the diodes. The device further comprises means for applying a reverse voltage to one or more individual diodes or groups of diodes and means for measuring the leakage current resulting from this reverse voltage. The invention also relates to a method of manufacturing such a display device and to an electronic device, such as a mobile telephone or an organiser, comprising such a display device.
    Type: Application
    Filed: November 12, 2003
    Publication date: August 26, 2004
    Inventors: Mark Thomas Johnson, Johannes Nicolaas Huiberts, Andrea Giraldo