Patents by Inventor Alexander Victor Henzen
Alexander Victor Henzen 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: 20220076610Abstract: A display comprises a matrix comprising a plurality of N rows divided into a plurality of M columns of cells, each cell including a light emitting device; a scan driver providing a plurality of N scan line signals to respective rows of said matrix, each for selecting a respective row of the matrix to be programmed with pixel values; and a data driver providing a plurality of M variable level data signals to respective columns of the matrix, each for programming a respective pixel within a selected row of the matrix with a pixel value. A pulse driver provides a plurality of N driving signals to respective rows of the matrix, each driving signal comprising successive sequences of pulses enabling the cells to emit light according to their programmed pixel values during respective sub-frames of successive frames to be displayed.Type: ApplicationFiled: November 15, 2021Publication date: March 10, 2022Inventors: Ilias Pappas, Sean Lord, Yu-Hsuan Li, Alexander Victor Henzen
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Patent number: 11200831Abstract: A display comprises a matrix comprising a plurality of N rows divided into a plurality of M columns of cells, each cell including a light emitting device; a scan driver providing a plurality of N scan line signals to respective rows of said matrix, each for selecting a respective row of the matrix to be programmed with pixel values; and a data driver providing a plurality of M variable level data signals to respective columns of the matrix, each for programming a respective pixel within a selected row of the matrix with a pixel value. A pulse driver provides a plurality of N driving signals to respective rows of the matrix, each driving signal comprising successive sequences of pulses enabling the cells to emit light according to their programmed pixel values during respective sub-frames of successive frames to be displayed.Type: GrantFiled: March 14, 2017Date of Patent: December 14, 2021Assignee: Facebook Technologies, LLCInventors: Ilias Pappas, Sean Lord, Yu-Hsuan Li, Alexander Victor Henzen
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Patent number: 10991322Abstract: Provided is a bistable driving method for an electrowetting display, comprising: setting a non-selected voltage for one or more writing rows; switching a row voltage of the one or more writing rows from the non-selected voltage to a selected voltage; applying the digital voltage on at least one column of digital electrodes to be written; switching the row voltage of the one or more writing rows from the selected voltage to the non-selected voltage, and decreasing the digital voltage applied to the at least one column to a voltage less than the opening voltage minus the selected voltage; and applying the steps above to next one or more writing rows until an entire display screen is written.Type: GrantFiled: November 8, 2017Date of Patent: April 27, 2021Assignees: Academy of Shenzhen Guohua Optoelectronics, Shenzhen Guohua Optoelectronics Co., Ltd.Inventors: Guofu Zhou, Weijie Lin, Alexander Victor Henzen
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Publication number: 20200027407Abstract: Provided is a bistable driving method for an electrowetting display, comprising: setting a non-selected voltage for one or more writing lines; switching a line voltage of the one or more writing lines from the non-selected voltage to a selected voltage; applying the digital voltage on at least one column of digital electrodes to be written; switching the line voltage of the one or more writing lines from the selected voltage to the non-selected voltage, and decreasing the digital voltage applied to the at least one column to a voltage less than the opening voltage; and applying the steps above to next one or more writing lines until an entire display screen is written.Type: ApplicationFiled: November 8, 2017Publication date: January 23, 2020Applicants: Academy of Shenzhen Guohua Optoelectronics, Shenzhen Guohua Optoelectronics Co., Ltd.Inventors: Guofu ZHOU, Weijie LIN, Alexander Victor HENZEN
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Patent number: 9201282Abstract: The invention relates to an electrophoretic display device, to a driver circuit for use in the electrophoretic display device and to chargeable or charged pigment particles for use in the electrophoretic display device. The electrophoretic display device comprises a pixel comprising charged pigment particles for determining a pigmentation of the pixel. The pixel comprises an aperture area being a visible part of the pixel determining the pigmentation of the pixel. The pixel further comprises a storage area for storing the charged pigment particles away from the aperture area. The pixel comprises an accumulation electrode arranged at the storage area for accumulating the charged pigment particles away from the aperture area, and comprises a field electrode occupying a field-electrode area being at least a part of the aperture area of the pixel. The charged pigment particles are movable between the accumulation electrode and the field electrode under control of an electric field.Type: GrantFiled: July 20, 2010Date of Patent: December 1, 2015Assignee: HJ FOREVER PATENTS B.V.Inventor: Alexander Victor Henzen
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Publication number: 20150331294Abstract: The invention provides a voltage switchable nanoparticle-dye complex, obtainable by reacting at least ZnO nanoparticles, TiO2 nanoparticles and a bipyridine compound, wherein each pyridine ring bears at least one carboxyl or carboxaldehyde group, a composition for use in display and electronic paper technology equipment, comprising said voltage switchable nanoparticle-dye complex, a process for the manufacture of said nanoparticle-dye complex and a process for the manufacture of a display coated with nanoparticle-dye complex. The invention further provides a display panel comprising such nanoparticle-dye complex or composition.Type: ApplicationFiled: February 8, 2013Publication date: November 19, 2015Inventors: Robert Paul WENZ, Alexander Victor HENZEN
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Patent number: 9013780Abstract: Electrophoretic displays use motion of particles through a fluid to generate images. This invention describes the use of concerted motion of particles together with the solvent to generate optical switching.Type: GrantFiled: April 19, 2011Date of Patent: April 21, 2015Inventors: Alexander Victor Henzen, Jan Groenewold
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Publication number: 20130208339Abstract: Electrophoretic displays use motion of particles through a fluid to generate images. This invention describes the use of concerted motion of particles together with the solvent to generate optical switching.Type: ApplicationFiled: April 19, 2011Publication date: August 15, 2013Applicant: IRX IP B.V.Inventors: Alexander Victor Henzen, Jan Groenewold
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Publication number: 20120188152Abstract: The invention relates to an electrophoretic display device, to a driver circuit for use in the electrophoretic display device and to chargeable or charged pigment particles for use in the electrophoretic display device. The electrophoretic display device comprises a pixel comprising charged pigment particles for determining a pigmentation of the pixel. The pixel comprises an aperture area being a visible part of the pixel determining the pigmentation of the pixel. The pixel further comprises a storage area for storing the charged pigment particles away from the aperture area. The pixel comprises an accumulation electrode arranged at the storage area for accumulating the charged pigment particles away from the aperture area, and comprises a field electrode occupying a field-electrode area being at least a part of the aperture area of the pixel. The charged pigment particles are movable between the accumulation electrode and the field electrode under control of an electric field.Type: ApplicationFiled: July 20, 2010Publication date: July 26, 2012Inventor: Alexander Victor Henzen
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Patent number: 7952792Abstract: The invention relates to a reflective display (1) comprising a substrate (4) and a reflective layer (3), e.g. comprising microcapsules (2) with an electrophoretic suspension arranged to reflect incident light (12) passing through the substrate (4), wherein the substrate (4) is structured so as to form a plurality of funnel-shaped protrusions (7) with reflective walls (8), the protrusions being oriented with a top end (72) facing towards the reflective layer and a base end (71) facing away from the reflective layer. According to this design, light that is reflected at sufficiently large reflection angles will experience one or more reflections by the protrusion walls (8). At each reflection the angle of propagation of the light (11) traveling through the substrate is decreased by twice the angle alpha between the wall (8) and the normal of the reflective layer (3).Type: GrantFiled: April 2, 2008Date of Patent: May 31, 2011Assignee: Koninklijke Philips Electronics N.V.Inventors: Frank Anton Van Abeelen, Alexander Victor Henzen
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Publication number: 20100118383Abstract: The invention relates to a reflective display (1) comprising a substrate (4) and a reflective layer (3), e.g. comprising microcapsules (2) with an electrophoretic suspension arranged to reflect incident light (12) passing through the substrate (4), wherein the substrate (4) is structured so as to form a plurality of funnel-shaped protrusions (7) with reflective walls (8), the protrusions being oriented with a top end (72) facing towards the reflective layer and a base end (71) facing away from the reflective layer. According to this design, light that is reflected at sufficiently large reflection angles will experience one or more reflections by the protrusion walls (8). At each reflection the angle of propagation of the light (11) traveling through the substrate is decreased by twice the angle alpha between the wall (8) and the normal of the reflective layer (3).Type: ApplicationFiled: April 2, 2008Publication date: May 13, 2010Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Frank Anton Van Abeelen, Alexander Victor Henzen
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Patent number: 7609436Abstract: An electro-optically active display device including at least one individually addressable pixel, each pixel being provided with an obstructing element, such as a reservoir light shield, a black matrix or a mirror element. A portion of at least one electrical component is positioned beneath the obstructing element in such a way that the portion is not visible for a viewer of the display device.Type: GrantFiled: November 6, 2007Date of Patent: October 27, 2009Assignee: Koninklijke Philips Electronics N.V.Inventors: Mark Thomas Johnson, Alexander Victor Henzen, Hugo Johan Cornelissen
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Patent number: 7463407Abstract: The invention relates to an electro-optically active display device, comprising at least one individually addressable pixel, each pixel being provided with an obstructing element (3), such as a reservoir light shield, a black matrix or a mirror element. According to the invention, a portion of at least one component is positioned beneath the obstructing element in such a way that the portion is not visible for a viewer of the display device.Type: GrantFiled: May 27, 2003Date of Patent: December 9, 2008Assignee: Koninklijke Philips Electronics N.V.Inventors: Mark Thomas Johnson, Alexander Victor Henzen, Hugo Johan Cornelissen
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Patent number: 7324263Abstract: The electrophoretic multi-color display device has a plurality of cells (10, 10?, 10?, . . . ) with an electrophoretic medium (14) and pixel electrodes (11, 11?, 11?, . . . ) for selecting a subgroup of cells. A color filter array (13) is associated with the pixel electrodes. The color filter array (13) and the pixel electrodes (11, 11?, 11?, . . . ) are provided at the same side of the electrophoretic medium (14). Preferably, the cells (10, 10?, 10?, . . . ) of the color filter array (13) are arranged according to a matrix and are disposed along lines registering with the pixel electrodes (11, 11?, 11?, . . . ). Preferably, an insulating material (17) with a relatively low refractive index is provided between the pixel electrodes (11, 11?, 11? . . . ) and the color filter array (13). Preferably, the insulating material (17) is selected from the group formed by a fluor-polymer, a low-dielectric inorganic film and a low-dielectric nano-porous film.Type: GrantFiled: February 5, 2004Date of Patent: January 29, 2008Assignee: Koninklijke Philips Electronics N.V.Inventors: Mark Thomas Johnson, Alexander Victor Henzen, Hugo Johan Cornelissen
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Patent number: 7126743Abstract: An electrophoretic display device (1) comprising one pixel (10) with an electrophoretic medium (13), electrodes (6, 7), as well as drive means (4) by which the pixels can be brought into different optical states. Some time (thold) after the application of an addressing pulse (Paddress) for setting the brightness level (Rw, Rb) of a pixel (10), a restore pulse voltage (Prestore) is applied between the electrodes (6,6?,7) for restoring the brightness level of a pixel to the set level (Rw, Rb). The restore pulse may be a set of consecutive pulses to bring the drifted brightness level even more smoothly (i.e. less perceivably) back to the original brightness level.Type: GrantFiled: February 12, 2003Date of Patent: October 24, 2006Assignee: Koninklijke Philips Electronics N.V.Inventors: Mark Thomas Johnson, Guo-Fu Zhou, Alexander Victor Henzen, Michael Geoffrey Pitt
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Patent number: 7126577Abstract: The invention relates to a display device comprising electrophoretic particles, a display element comprising a pixel electrode and an associated counter electrode, between which a portion of the electrophoretic particles is present, and a controller for supplying a drive signal to the electrodes to bring the display element to a predetermined black or white state, corresponding to the image information to be displayed. In order to improve the refresh time of the display, the controller is further arranged to supply a preset signal preceding the drive signal comprising a preset pulse representing an energy which is sufficient to release the electrophoretic particles at a first position near one of the two electrodes corresponding to a black state, but is too low to enable the particles to reach a second position near the other electrode corresponding to a white state.Type: GrantFiled: February 6, 2003Date of Patent: October 24, 2006Assignee: Koninklijke Philips Electronics N.V.Inventors: Guo-Fu Zhou, Mark Thomas Johnson, Alexander Victor Henzen, Willibrordus Jurrianus Dijkman
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Publication number: 20020149731Abstract: The row and column conductors (5,6) of a (passive LCD) display are realized by way of vias (8) through the backpanel and establish electric connections on the rear side of the display. A further wiring pattern (9) may be provided on the rear side so as to realize further interconnections.Type: ApplicationFiled: March 29, 2002Publication date: October 17, 2002Inventors: Peter Jan Slikkerveer, Alexander Victor Henzen, Petrus Cornelis Paulus Bouten