Patents by Inventor Karel E. Kuijk
Karel E. Kuijk 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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Patent number: 6507331Abstract: A display device having a first substrate with row electrodes and a second substrate with column electrodes define pixels of a light-modulating cell. An electro-optical layer is capable of assuming a plurality of states with at least two states of which are stable in the absence of an electric field. The display device further has drive means for driving the row electrodes with selection signals and for driving the column electrodes with data signals in conformity with an image to be displayed. The first and second substrates are spaced such that the light-modulating cell has a thickness at least two times the pitch P of the electro-optical material. In the operating state, the drive means sequentially provide groups of p row electrodes (p>1) with mutually orthogonal signals during a selection period.Type: GrantFiled: May 24, 2000Date of Patent: January 14, 2003Assignee: Koninklijke Philips Electronics N.V.Inventors: Lucas J. M. Schlangen, Karel E. Kuijk
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Patent number: 6313817Abstract: Passive display driven by means of multiple-row addressing, in which the drive voltages are decreased by an optimum choice of the number of orthogonal signals.Type: GrantFiled: August 20, 1998Date of Patent: November 6, 2001Assignee: U.S. Philips CorporationInventor: Karel E. Kuijk
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Publication number: 20010022567Abstract: Passive display driven by means of multiple-row addressing, in which the drive voltages are decreased by an optimum choice of the number of orthogonal signals.Type: ApplicationFiled: August 20, 1998Publication date: September 20, 2001Inventor: KAREL E. KUIJK
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Patent number: 6057895Abstract: A flat display device preferably of the PALC type in which the plasma channels are formed by depositing successive layers of electrically conductive and electrically insulating material on a substrate containing spaced walls of a resist material that are preferably structured with a negative slope to form in the space between the resist walls flanking channel walls comprising an electrode layer and rising above it a wall of insulating material with the electrode layer sides exposed to adjacent channels. Subsequently, the resist walls are removed by a lift-off process removing with it the layer deposits on the resist walls leaving behind the layer deposits between the resist walls. The remaining insulating walls are then covered with thin dielectric sheet-like member to form the plasma channels.Type: GrantFiled: September 28, 1995Date of Patent: May 2, 2000Assignee: Philips Electronics North America CorporationInventors: Henri R. J. R. Van Helleputte, Jacob Bruinink, Adrianus L. J. Burgmans, Petrus F. G. Bongaerts, Babar A. Khan, Karel E. Kuijk
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Patent number: 6014119Abstract: Control device for an electroluminescent display device, comprising an active layer of a semiconducting polymer of, for example pixels arranged in the form of a matrix, reducing flicker and crosstalk. The control device may be based on voltage control at which voltages across the pixels are at least 1.6 V, but is preferably based on current control, at which the duration of the data pulses determines the grey level.Type: GrantFiled: May 17, 1996Date of Patent: January 11, 2000Assignee: U.S. Philips CorporationInventors: Aemilianus G. J. Staring, David B. Braun, Karel E. Kuijk
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Patent number: 5898416Abstract: A display device which is based on a number of pixels (2) which are arranged in rows and columns, each pixel having a two-pole switching element (3) between an electrode (13) of a pixel and a row electrode (5), and a second two-pole switching element (23) between said electrode of the pixel and an auxiliary row electrode (25) used for resetting, auxiliary row electrodes for resetting having a common connection (24) for a plurality of rows of pixels.Type: GrantFiled: March 6, 1997Date of Patent: April 27, 1999Assignee: U.S. Philips CorporationInventors: Karel E. Kuijk, Gerrit Oversluizen
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Patent number: 5838287Abstract: A liquid crystal display device (LCD) includes sets of row address conductors (10) and column address conductors (11) which are coupled to liquid crystal pixels (12) arranged in a matrix of rows and columns for displaying images. A drive circuit (20-24) for such a display device generates selection voltages (Vr) to be supplied to one of the sets of address conductors (10, 11), and data voltages (Vk) to be supplied to the other set of address conductors (10, 11), the data voltages (Vk) being related to a received display information signal (VI).Type: GrantFiled: October 31, 1996Date of Patent: November 17, 1998Assignee: U.S. Philips CorporationInventor: Karel E. Kuijk
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Patent number: 5838290Abstract: A display device in which an internal auxiliary voltage, which is used for controlling, is obtained via photovoltaic converter.Type: GrantFiled: March 6, 1997Date of Patent: November 17, 1998Assignee: U.S. Philips CorporationInventor: Karel E. Kuijk
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Patent number: 5781169Abstract: A drive of a display device based on polymer LEDs, for example pixels arranged in the form of a matrix, in which the lifetime is increased by writing the information from an interlaced signal each time into two successive rows. The driving may be based on voltage control at which voltages across the pixels define the picture to be displayed, but may alternatively be based on current control.Type: GrantFiled: October 31, 1996Date of Patent: July 14, 1998Assignee: U.S. Philips CorporationInventors: Karel E. Kuijk, Ronald R. Drenten
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Patent number: 5689282Abstract: When an active matrix LCD is driven while using inversion per n rows (n.gtoreq.2), stripe effects occur. In the case of double line inversion this leads to stripes in the picture. This can be largely obviated by supplying a different selection voltage to at least the last row of the rows in a group of n rows.Type: GrantFiled: June 15, 1992Date of Patent: November 18, 1997Assignee: U.S. Philips CorporationInventors: Peter B. A. Wolfs, Karel E. Kuijk
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Patent number: 5648794Abstract: To prevent burn-in of images, notably with pixels (14) driven via non-linear two-pole switching elements (8), a display device is controlled in such a way that the charge transport through the two-pole element is substantially independent of the grey level. Capacitance variations due to pixel voltage variations are compensated by adapting the voltage change across the pixel (14) via extra reset signals and/or compensation signals.Type: GrantFiled: March 16, 1995Date of Patent: July 15, 1997Assignee: U.S. Philips CorporationInventors: Siebe Jelsma, Karel E. Kuijk
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Patent number: 5626772Abstract: A flat display device preferably of the PALC type in which a fragile micro-sheet covering the plasma channels is replaced by a more robust plate having etched spaced elongated cavities configured in such a way that the top portions of the plate between side walls of each cavity defining a channel and facing the bottom plate are substantially flat. Preferably, the thickness of the glass top plate separating each plasma discharge from an electro-optic pixel is made substantially uniformly thin while the side walls reinforce and greatly increase the strength of the plate making it less prone to breakage during assembly of a display panel. Preferably, the glass plate is etched by means of a plasma etching process.Type: GrantFiled: March 20, 1995Date of Patent: May 6, 1997Assignee: Philips Electronics North America CorporationInventors: Petrus F. G. Bongaerts, Jacob Bruinink, Adrianus L. J. Burgmans, Henri R. J. R. Van Helleputte, Babar A. Khan, Karel E. Kuijk, Thomas S. Buzak, Kevin J. Ilcisin, Paul C. Martin
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Patent number: 5596431Abstract: A method for making an electrical device such as a PALC display device, and the electrical device or PALC device so made, in which a channel plate is provided with substantially vertical side walls, and the electrodes are formed by a self-aligning anisotropic plasma etching process which requires no photolithography. A similar process may be used to form a fanout region for individual contacting of channel electrodes. For improved contacting, preferably the fanout region is also channelled and an upstanding structure such as columns provided in the fanout channels so that the spaces between the columns and between the columns and the side walls are filled up with deposited metal that remains following the anisotropic etching process.Type: GrantFiled: March 29, 1995Date of Patent: January 21, 1997Assignee: Philips Electronics North America Corp.Inventors: Petrus F. G. Bongaerts, Jacob Bruinink, Adrianus L. J. Burgmans, Henri R. J. R. Van Helleputte, Babar A. Khan, Karel E. Kuijk
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Patent number: 5537007Abstract: By incorporating two-pole circuits (13) as switching elements in a picture display device based on field emission, the emission (and hence the picture intensity) is substantially defined by the charge of a capacitance (15) associated with a part of a pixel (8). Charge-controlled drive leads to a more accurate adjustment than the voltage-controlled drive used until now and leads to lower drive voltages, less power consumption and a longer lifetime of the phosphors used in the display device.Type: GrantFiled: September 17, 1993Date of Patent: July 16, 1996Assignee: U.S. Philips CorporationInventors: Dirk W. Harberts, Karel E. Kuijk, Remko Horne, Gerardus N. A. Van Veen, Hans-Helmut Bechtel
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Patent number: 5159325Abstract: In a picture display device with pixels (12) which are driven via active elements (15), non-uniformities in the electrical behaviour of the active elements are obviated by driving the device in a reset mode.Type: GrantFiled: September 29, 1989Date of Patent: October 27, 1992Assignee: U.S. Philips CorporationInventors: Karel E. Kuijk, Alan G. Knapp, John M. Shannon
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Patent number: 5151691Abstract: In a display device driven with an active matrix the capacitances associated with the pixels (2) are first discharged or charged as far as or beyond the range of transition in the transmission/voltage characteristic before they are accurately adjusted. A capacitive element (10) is connected in parallel with a series arrangement of first (5) and second (8) asymmetrical non-linear switching elements and stores an electric charge which is used for discharging or charging the pixels.Type: GrantFiled: October 30, 1990Date of Patent: September 29, 1992Assignee: U.S. Philips CorporationInventor: Karel E. Kuijk
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Patent number: 5056894Abstract: An a:Si diode (7) for use in LCDs is located between two metal contacts (10, 15) which extend throughout the diode surface. This reduces the detrimental effect due to the light sensitivity of (amorphous) silicon. A MIM element (8) parallel to the diode (7) is obtained by having the metal contacts project further and by providing a thin layer of insulating material (13, 19) between these contacts.Type: GrantFiled: February 13, 1990Date of Patent: October 15, 1991Assignee: U.S. Philips CorporationInventors: Karel E. Kuijk, Frederikus R. J. Huisman
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Patent number: 5047758Abstract: In a method of driving a passive ferro-electric display device the selection voltages, "blanking" voltages and data voltages are given a bipolar character so that the values of the data voltages with respect to the "blanking" voltage can be chosen to be so low that there is substantially no crosstalk. In a passive display device this provides the possibility of driving large numbers of lines (for example, for LCD-TV) while maintaining the contrast.Type: GrantFiled: November 9, 1990Date of Patent: September 10, 1991Assignee: U.S. Philips CorporationInventors: Wilbert J. A. M. Hartmann, Karel E. Kuijk
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Patent number: 5032831Abstract: In a picture display device driven with an active matrix the voltage across the pixels (12) is accurately adjusted by discharging or charging the associated capacitances, if necessary, first to beyond the transition range (17) in the transmission/voltage characteristic.Type: GrantFiled: June 16, 1988Date of Patent: July 16, 1991Assignee: U.S. Philips CorporationInventor: Karel E. Kuijk
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Patent number: RE37906Abstract: In a picture display device driven with an active matrix the voltage across the pixels (12) is accurately adjusted by discharging or charging the associated capacitances, if necessary, first to beyond the transition range (17) in the transmission/voltage characteristic.Type: GrantFiled: July 8, 1993Date of Patent: November 19, 2002Assignee: Koninklijke Philips Electronics N.V.Inventor: Karel E. Kuijk