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).
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Publication number: 20140285869Abstract: An electrowetting display device includes at least one picture element having a first support plate, a second support plate and a space between the first support plate and the second support plate. The first support plate includes a reflector for reflecting light and the second support plate includes a light diffuser.Type: ApplicationFiled: June 9, 2014Publication date: September 25, 2014Inventor: Andrea Giraldo
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Patent number: 8810883Abstract: An electrowetting display apparatus includes a first substrate including a first electrode that receives a gray-scale voltage and a second electrode insulated from the first electrode and receiving a reference voltage, a second substrate, a fluid layer, and a color filter. The color filter has a first thickness in an area corresponding to the first electrode and a second thickness in an area corresponding to the second electrode, and the first thickness is larger than the second thickness. Accordingly, a cell gap of the electrowetting display apparatus is reduced, and color reproducibility of the electrowetting display apparatus is improved without sacrificing brightness.Type: GrantFiled: July 26, 2012Date of Patent: August 19, 2014Assignee: Liquavista B.V.Inventors: Sanghyun Lee, Yungkyung Park, Dohyoung Kwon, Gichang Park, Jongseo Lee, Andrea Giraldo, Nicolas Bergeron
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Publication number: 20140218785Abstract: An electrowetting display device includes a picture element having a first support plate and a second support plate. A surface of a second layer of the first support plate is non-planar and has a shape at least partly corresponding with a pattern of a first layer of the first support plate.Type: ApplicationFiled: April 4, 2014Publication date: August 7, 2014Applicant: Liquavista B.V.Inventors: Jozef Elisabeth Aubert, Nicolas Eugene Bergeron, Roy Van Dijk, Andrea Giraldo
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Publication number: 20140211291Abstract: An electrowetting display device includes a greyscale picture element layer having at least one first picture element having a first fluid configurable to provide a greyscale display state, and a colour picture element layer having at least one second picture element having a second fluid configurable to provide a colour display state.Type: ApplicationFiled: March 28, 2014Publication date: July 31, 2014Applicant: Liquavista B.V.Inventors: Bokke Johannes Feenstra, Andrea Giraldo, Anthony John Slack, Kurt Petersdorff Reynhart
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Publication number: 20140192465Abstract: An electrowetting display device comprising at least one picture element with a first support plate including a first electrical element, a second electrical element and a through-connection electrically connecting the first electrical element to the second electrical element. The through-connection is arranged outside a projected display area of the at least one picture element.Type: ApplicationFiled: March 12, 2014Publication date: July 10, 2014Applicant: Liquavista B.V.Inventors: Andrea Giraldo, Paul Vermeulen
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Publication number: 20140168749Abstract: An electrowetting display device has a picture element having first and second support plates with a space in between, the space including first and second fluids immiscible with each other, the second fluid being electroconductive or polar. The first support plate includes a wall defining an extent of the picture element. An electric field is applied between an electrode and the second fluid, the electrode having an edge, a low portion and a high portion, the high portion being closer to the second support plate than the low portion, the high portion being arranged adjacent to the wall and having an area smaller than the area of the low portion. The high portion of the electrode has a cut-out causing an increased electric field in the space, and at least part of the edge of the electrode adjacent to the cut-out following the shape of the wall.Type: ApplicationFiled: February 24, 2014Publication date: June 19, 2014Inventors: Andrea Giraldo, Nicolas Eugene Bergeron, Jozef Elisabeth Aubert
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Patent number: 8730555Abstract: An electrowetting display device comprises a plurality of picture elements (2) having a first support plate (5) including a surface (68) and a second support plate. A space (10) of a picture element between the surface of the first support plate and the second support plate includes at least one first fluid and a second fluid immiscible with each other, the second fluid being electroconductive or polar. The first support plate includes an electrode (46) for applying an electric field in the picture element. It also includes a layer (44) arranged on a side of the electrode facing away from said space. The layer forms an electronic component (33) for applying a voltage to the electrode. The electrode comprises a height difference (86) corresponding to a thickness of the layer (44). The height difference causes an inhomogeneous electric field in the space, providing a preferred direction of motion of the first fluid on application of the electric field.Type: GrantFiled: June 4, 2010Date of Patent: May 20, 2014Assignee: Liquavista B.V.Inventors: Jo Aubert, Nicolas Bergeron, Roy Van Dijk, Andrea Giraldo
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Publication number: 20140104673Abstract: An electrowetting display device comprises a picture element having a first support plate and a second support plate having a space therebetween having a first fluid and a second fluid immiscible with the first fluid. The first support plate comprises a display area, adjoining the space, within which the first fluid is confined and having a first surface adjoining the space. A wall protrudes from the first support plate and is formed outside the display area along a part of the perimeter of the display area. The wall has a second surface facing the display area and adjoining the space. An electrode has a first portion adjacent to the first surface and a second portion adjacent to at least a part of the second surface such that a surface of the second portion including a long side of a cross section of the second portion faces the display area.Type: ApplicationFiled: December 19, 2013Publication date: April 17, 2014Applicant: Liquavista B.V.Inventors: Pavel Novoselov, Toru Sakai, Daniel Figura, Andrea Giraldo
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Publication number: 20130155480Abstract: An electrowetting display apparatus includes a first substrate including a first electrode that receives a gray-scale voltage and a second electrode insulated from the first electrode and receiving a reference voltage, a second substrate, a fluid layer, and a color filter. The color filter has a first thickness in an area corresponding to the first electrode and a second thickness in an area corresponding to the second electrode, and the first thickness is larger than the second thickness. Accordingly, a cell gap of the electrowetting display apparatus is reduced, and color reproducibility of the electrowetting display apparatus is improved without sacrificing brightness.Type: ApplicationFiled: July 26, 2012Publication date: June 20, 2013Applicant: SAMSUNG DISPLAY CO., LTD.Inventors: Sanghyun LEE, Yungkyung PARK, Dohyoung KWON, Gichang PARK, Jongseo LEE, Andrea GIRALDO, Nicolas Bergeron
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Patent number: 8416488Abstract: A display device comprising picture elements, which are constituted by electrowetting elements having at least one first fluid and a second fluid immiscible with each other within a space between a first support plate and a second support plate, the second fluid being electro-conductive or polar. The first fluid in each element is at the side of the first support plate confined by element walls, and the second fluid is shared by a plurality of picture elements, characterized by a preventer for preventing first fluid portions from being expelled from its confinement when forces other than electrowetting forces are exerted on this fluid.Type: GrantFiled: June 14, 2010Date of Patent: April 9, 2013Assignee: Samsung LCD Netherlands R & D Cneter B.V.Inventors: Robert A. Hayes, Andrea Giraldo, Anthony John Slack, Johannes Bokke Feenstra, Roy Van Dijk, Ivar Schram
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Patent number: 8384631Abstract: An active matrix display panel comprises a substrate, an array of pixel circuits being arranged in a matrix of at least one column and a plurality of rows on the substrate, each pixel circuit comprising a light-emitting element, capable of emitting light of an intensity determined by the value of a current passed through it, and at least one column line, each column line arranged to conduct a reference current, provided by a current driving circuit, when connected to the panel. The pixel circuits in a column are divided into a plurality of groups of at least one pixel circuit. The active matrix display panel comprises at least one current mirror circuit associated with a first group, comprising a first current mirror, arranged to mirror a reference current flowing through a column line to a first current mirror output.Type: GrantFiled: November 16, 2010Date of Patent: February 26, 2013Assignee: Chimei Innolux CorporationInventors: Adrianus Sempel, Gerben J. Hekstra, David A. Fish, Alan G. Kanpp, Andrea Giraldo, Mark T. Johnson
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Patent number: 8384985Abstract: Transflective electrowetting display device comprising electrowetting elements, each having at least one reflective area and at least one transmissive area, whereby the surface of the at least one reflective area of the structured reflector is offset in the direction of the viewing side of the display device with respect to the at least one transmissive area of the structured reflector such that a thickness of the second fluid over the at least one transmissive area is greater than the thickness of the second fluid over the at least one reflective area.Type: GrantFiled: June 4, 2010Date of Patent: February 26, 2013Assignee: Samsung LCD Netherlands R & D Center B.V.Inventor: Andrea Giraldo
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Patent number: 8310413Abstract: An active matrix display device comprises an array of display pixels, with each pixel comprising an EL display element, a light-dependent device for detecting the brightness of the display element and a drive transistor circuit for driving a current through the display element. The drive transistor is controlled in response to the light-dependent device output so that ageing compensation can be implemented. The light-dependent device is located laterally of the area of light emitting material of the EL display element. In this way, the light-dependent device does not cause step coverage problems and can be integrated into the pixel layout without affecting the pixel aperture. Furthermore, the light dependent device can extend alongside the full length of the area of light emitting material so that it receives light input from a large part of the display element area.Type: GrantFiled: March 2, 2005Date of Patent: November 13, 2012Assignee: Koninklijke Philips Electronics N.V.Inventors: David A. Fish, Nigel D. Young, Herbert Lifka, Andrea Giraldo, Wouter Oepts
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Publication number: 20110109670Abstract: An active matrix display panel comprises a substrate, an array of pixel circuits being arranged in a matrix of at least one column and a plurality of rows on the substrate, each pixel circuit comprising a light-emitting element, capable of emitting light of an intensity determined by the value of a current passed through it, and at least one column line, each column line arranged to conduct a reference current, provided by a current driving circuit, when connected to the panel. The pixel circuits in a column are divided into a plurality of groups of at least one pixel circuit. The active matrix display panel comprises at least one current mirror circuit associated with a first group, comprising a first current mirror, arranged to mirror a reference current flowing through a column line to a first current mirror output.Type: ApplicationFiled: November 16, 2010Publication date: May 12, 2011Applicant: TPO Displays Corp.Inventors: Adrianus Sempel, Gerben J. Hekstra, David A. Fish, Alan G. Knapp, Andrea Giraldo, Mark T. Johnson
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Patent number: 7903317Abstract: A transflective display device has a viewing side (7) and a rear side (8) and comprises a plurality of electrowetting elements (2) having a first support plate (5) facing the viewing side and a second support plate (6) facing the rear side. Each electrowetting element comprises a space (10) between the first support plate and the second support plate and includes a first fluid (11) and a second fluid (12) immiscible with each other. The second fluid absorbs at least a part of the optical spectrum. The position of the second fluid is controllable to cover a predetermined area (30) of the cross-section (29) of the space in the plane of the second support plate. A structured reflector (18) is arranged on the second support plate, comprising within the cross-section an area (33, 34) transparent for light incident from the rear side and an area (35, 36) reflective for light incident from the viewing side.Type: GrantFiled: June 1, 2007Date of Patent: March 8, 2011Assignee: Liquavista B.V.Inventors: Bokke Johannes Feenstra, Roy Van Dijk, Andrea Giraldo, Robert A. Hayes
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Patent number: 7898741Abstract: A color display device (1) comprises a plurality of picture elements (3, 4, 5), the plurality of picture elements having a viewing side (5) and a rear side (6). Each picture element includes a light valve (7, 8, 9). The display device comprises a switchable part (12, 13) for selectively directing light of a first color and light of a second color through the light valve from the rear side to the viewing side. Each light valve comprises a first and a second switchable color filter (17, 19) having a transmittance for a third color and a fourth color, respectively, and arranged in succession in the path of the light.Type: GrantFiled: June 1, 2007Date of Patent: March 1, 2011Assignee: Liquavista, B.V.Inventors: Remco Los, Andrea Giraldo, Anthony Slack
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Patent number: 7859493Abstract: An active matrix display panel comprises a substrate, array of pixel circuits being arranged in a matrix of at least one column and a plurality of rows on the substrate, each pixel circuit comprising a light-emitting element, capable of emitting light of an intensity determined by the value of a current passed through it, and at least one column line, each column line arranged to conduct a reference current, provided by a current driving circuit, when connected to the panel. The pixel circuits in a column are divided into a plurality of groups of at least one pixel circuit. The active matrix display panel comprises at least one current mirror circuit associated with a first group, comprising a first current mirror, arranged to mirror a reference current flowing through a column line to a first current mirror output.Type: GrantFiled: April 15, 2004Date of Patent: December 28, 2010Assignee: TPO Displays Corp.Inventors: Adrianus Sempel, Gerben J. Hekstra, David A. Fish, Alan G. Knapp, Andrea Giraldo, Mark T. Johnson
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Publication number: 20100321760Abstract: A display device comprising picture elements, which are constituted by electrowetting elements having at least one first fluid and a second fluid immiscible with each other within a space between a first support plate and a second support plate, the second fluid being electro-conductive or polar. The first fluid in each element is at the side of the first support plate confined by element walls, and the second fluid is shared by a plurality of picture elements, characterised by a preventer for preventing first fluid portions from being expelled from its confinement when forces other than electrowetting forces are exerted on this fluid.Type: ApplicationFiled: June 14, 2010Publication date: December 23, 2010Applicant: LIQUAVISTA B.V.Inventors: Robert A. Hayes, Andrea Giraldo, Anthony John Slack, Johannes Bokke Feenstra, Roy Van Dijk, Ivar Schram
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Publication number: 20100302615Abstract: An electrowetting display device comprises a plurality of picture elements (2) having a first support plate (5) including a surface (68) and a second support plate. A space (10) of a picture element between the surface of the first support plate and the second support plate includes at least one first fluid and a second fluid immiscible with each other, the second fluid being electroconductive or polar. The first support plate includes an electrode (46) for applying an electric field in the picture element. It also includes a layer (44) arranged on a side of the electrode facing away from said space. The layer forms an electronic component (33) for applying a voltage to the electrode. The electrode comprises a height difference (86) corresponding to a thickness of the layer (44). The height difference causes an inhomogeneous electric field in the space, providing a preferred direction of motion of the first fluid on application of the electric field.Type: ApplicationFiled: June 4, 2010Publication date: December 2, 2010Applicant: LIQUAVISTA B.V.Inventors: Jo Aubert, Nicolas Bergeron, Roy Van Dijk, Andrea Giraldo
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Publication number: 20100284056Abstract: Transflective electrowetting display device comprising electrowetting elements, each having at least one reflective area and at least one transmissive area, whereby the surface of the at least one reflective area of the structured reflector is offset in the direction of the viewing side of the display device with respect to the at least one transmissive area of the structured reflector such that a thickness of the second fluid over the at least one transmissive area is greater than the thickness of the second fluid over the at least one reflective area.Type: ApplicationFiled: June 4, 2010Publication date: November 11, 2010Applicant: LIQUAVISTA B.V.Inventor: Andrea Giraldo