Patents by Inventor Wilhelmus Johannes Robertus Van Lier
Wilhelmus Johannes Robertus Van Lier 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: 11900859Abstract: A driver system controls a plurality of light emitting diodes (LEDs). The driver system includes a first driver to provide an LED current to each of the plurality of LEDs. The first driver includes a current mirror for the LED current provided to the plurality of LEDs. The driver system also includes a second driver to modulate the LED current provided to the plurality of LEDs.Type: GrantFiled: May 21, 2021Date of Patent: February 13, 2024Assignee: Lumileds LLCInventors: Wilhelmus Johannes Robertus Van Lier, Marcus Hendrikus Adrianus van Steen, Nicola Bettina Pfeffer, Rob Jacques Paul Engelen, Erkan Diken, Arjen Gerben Van Der Sijde
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Patent number: 11800233Abstract: An apparatus includes a neuromorphic vision unit, an array, and a controller. The neuromorphic vision unit includes a plurality of pixels to photoelectrically produce data based on light received from an object in a scene. The array includes a plurality of light sources. The controller controls the plurality of light sources at one of a plurality of granularities, at least in part based on the data.Type: GrantFiled: May 21, 2021Date of Patent: October 24, 2023Assignee: Lumileds LLCInventors: Erkan Diken, Arjen Gerben Van Der Sijde, Nicola Bettina Pfeffer, Wilhelmus Johannes Robertus Van Lier, Marcus Hendrikus Adrianus van Steen, Rob Jacques Paul Engelen
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Publication number: 20220375397Abstract: A driver system controls a plurality of light emitting diodes (LEDs). The driver system includes a first driver to provide an LED current to each of the plurality of LEDs. The first driver includes a current mirror for the LED current provided to the plurality of LEDs. The driver system also includes a second driver to modulate the LED current provided to the plurality of LEDs.Type: ApplicationFiled: May 21, 2021Publication date: November 24, 2022Applicant: Lumileds LLCInventors: Wilhelmus Johannes Robertus Van Lier, Marcus Hendrikus Adrianus van Steen, Nicola Bettina Pfeffer, Rob Jacques Paul Engelen, Erkan Diken, Arjen Gerben Van Der Sijde
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Publication number: 20220377222Abstract: An apparatus includes a neuromorphic vision unit, an array, and a controller. The neuromorphic vision unit includes a plurality of pixels to photoelectrically produce data based on light received from an object in a scene. The array includes a plurality of light sources. The controller controls the plurality of light sources at one of a plurality of granularities, at least in part based on the data.Type: ApplicationFiled: May 21, 2021Publication date: November 24, 2022Applicant: Lumileds LLCInventors: Erkan Diken, Arjen Gerben Van Der Sijde, Nicola Bettina Pfeffer, Wilhelmus Johannes Robertus Van Lier, Marcus Hendrikus Adrianus van Steen, Rob Jacques Paul Engelen
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Patent number: 10379340Abstract: An electrowetting display device includes a first support plate and a second support plate opposite the first support plate. A plurality of pixel walls are formed over the first support plate. The plurality of pixel walls are associated with a first pixel and a second pixel. The plurality of pixel walls define a first display area of the first pixel and a second display area of the second pixel. A first electrode is formed over the first support plate underneath the first display area of the first pixel. A second electrode is formed over the first support plate underneath the second display area of the second pixel. The first electrode is electrically connected to the second electrode. A first switch may be positioned underneath the second display area, with the first switch being electrically connected to the first electrode.Type: GrantFiled: September 27, 2017Date of Patent: August 13, 2019Assignee: AMAZON TECHNOLOGIES, INC.Inventors: Wilhelmus Johannes Robertus Van Lier, Toru Sakai, Abhishek Kumar, Gor Manukyan
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Publication number: 20160267854Abstract: This disclosure provides systems, methods and apparatus for reducing leakage in a driver circuit. In one aspect, the driver circuit may operate in a scanning time and an idle time. The driver circuit may update display elements during the scanning time. During the idle time, inputs to the driver circuit may be configured to be floating to reduce leakage.Type: ApplicationFiled: March 9, 2015Publication date: September 15, 2016Inventors: Cheonhong Kim, Heesun Shin, Wilhelmus Johannes Robertus Van Lier, John Hyunchul Hong
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Patent number: 9360511Abstract: This disclosure provides systems, methods and apparatus for measuring capacitance of a display unit, such as an interferometric modulator (IMOD). In one example, a circuit may include an operational amplifier (op-amp), a voltage controlled current source, and feedback from an output of the op-amp as an input to the voltage controlled current source. An output of the voltage controlled current source may be provided to a display unit as well as an input of the op-amp. A second input of the op-amp may be provided a ramping reference voltage.Type: GrantFiled: April 4, 2014Date of Patent: June 7, 2016Assignee: QUALCOMM MEMS Technologies, Inc.Inventors: Wilhelmus Johannes Robertus Van Lier, Robert Steven Kawamoto, James Steven Edgar, Pramod Kumar Varma
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Publication number: 20160126231Abstract: This disclosure provides systems, methods and apparatus for a ledge-free display. In one aspect, row driver circuits and column driver circuits may be provided from the backside of the display to reduce the size of the bezel around the display and eliminate the need for a bonding ledge for a ledge-free display.Type: ApplicationFiled: October 31, 2014Publication date: May 5, 2016Inventors: Denis Endisch, Cheonhong Kim, Wilhelmus Johannes Robertus Van Lier
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Patent number: 9293076Abstract: This disclosure provides systems, methods and apparatus for an arrangement of pixels and interconnects in a display. In one aspect, polarities of pixels may be in a dot inversion configuration, or checkerboard pattern, to reduce the visibility of flicker. Various interconnect alternatively couple between modules in different columns or rows to provide dot inversion.Type: GrantFiled: October 21, 2013Date of Patent: March 22, 2016Assignee: QUALCOMM MEMS Technologies, Inc.Inventors: Edward Keat Leem Chan, Bing Wen, Cheonhong Kim, Wilhelmus Johannes Robertus Van Lier, Chih-Hsiang Ho, Rihui He, Ming-Hau Tung, Alok Govil, Jae Hyeong Seo
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Publication number: 20160027410Abstract: Various display device implementations disclosed herein include display drivers with enhanced capabilities. In some implementations a display driver may be capable of updating a display while a central processing unit (CPU) is switched off or operating in a sleep mode. Some such display drivers may include a display driver clock and a display driver memory. The display driver may be capable of receiving image data from the CPU, including image data for display updates, and storing received image data in the display driver memory. The display driver may be capable of updating the display with stored image data at times indicated by the display driver clock. Some display drivers may include a graphics processing unit capable of generating image data for updates of the display. In some such implementations, the graphics processing unit may be capable of dithering image data.Type: ApplicationFiled: July 25, 2014Publication date: January 28, 2016Inventors: Hamid Tavakoli, William Cummings, Shen-Ge Wang, Wilhelmus Johannes Robertus Van Lier
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Publication number: 20160005363Abstract: This disclosure provides systems, methods and apparatus for providing an output voltage to be used in a display device. In one aspect, a circuit may include switches and a digital-to-analog converter (DAC). A charge recycling circuit may include a capacitive voltage divider providing voltage supplies for the switches to select from and provide to the DAC. A storage capacitor may be configured to be coupled one at a time and in parallel with individual capacitors of the capacitive voltage divider. The storage capacitor may store charge that may be reused. Additionally, a data control circuit may provide control signals for the switches and the DAC.Type: ApplicationFiled: July 7, 2014Publication date: January 7, 2016Inventors: Wilhelmus Johannes Robertus Van Lier, Joseph Peter John Manca, Vincent Anthony Condito
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Publication number: 20150348472Abstract: This disclosure provides systems, methods and apparatus for providing voltages to an arrangement of display modules in a display. In one aspect, a group including multiple rows of display modules may be provided a reset signal at the same time. Each row may be provided its own driver circuit to provide a row enable signal such that each row of display modules in the group may be biased row-by-row following the reset. Additionally, driver circuitry providing a variety of voltages to the display modules may be implemented in chip-on-glass (COG).Type: ApplicationFiled: May 30, 2014Publication date: December 3, 2015Applicant: QUALCOMM MEMS Technologies, Inc.Inventors: Edward Keat Leem Chan, Bing Wen, Wilhelmus Johannes Robertus Van Lier
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Publication number: 20150348473Abstract: A display apparatus comprising an array of electromechanical display elements and a driver circuit coupled to the array is provided. The driver circuit is configured to apply a DC voltage to a first stationary electrode of the display element and adjust a bias voltage applied to a second stationary electrode of the display element from a first bias voltage to a second bias voltage before a reset period. The driver circuit is further configured to apply a first reset voltage to a movable electrode of the display element during the reset period, apply a write voltage to the movable electrode during a charging period to charge the movable electrode with a charge Q defined at least in part by the write voltage, and adjust the bias voltage applied to the second stationary electrode from the second bias voltage to a third bias voltage during a bias period.Type: ApplicationFiled: September 29, 2014Publication date: December 3, 2015Inventors: Wilhelmus Johannes Robertus Van Lier, Edward Keat Leem Chan, Cheonhong Kim, Bing Wen
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Publication number: 20150287367Abstract: This disclosure provides systems, methods and apparatus for recycling charge. In one aspect, a circuit may include amplifiers with power supplies provided by a capacitor voltage divider. A storage capacitor may be configured to be coupled one at a time and in parallel with individual capacitors of the voltage divider. The storage capacitor may store charge that may be reused.Type: ApplicationFiled: April 4, 2014Publication date: October 8, 2015Applicant: QUALCOMM MEMS Technologies, Inc.Inventors: Wilhelmus Johannes Robertus Van Lier, Edward Keat Leem Chan, Vincent Anthony Condito
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Publication number: 20150108986Abstract: This disclosure provides systems, methods and apparatus for measuring capacitance of a display unit, such as an interferometric modulator (IMOD). In one example, a circuit may include an operational amplifier (op-amp), a voltage controlled current source, and feedback from an output of the op-amp as an input to the voltage controlled current source. An output of the voltage controlled current source may be provided to a display unit as well as an input of the op-amp. A second input of the op-amp may be provided a ramping reference voltage.Type: ApplicationFiled: April 4, 2014Publication date: April 23, 2015Applicant: QUALCOMM MEMS Technologies, Inc.Inventors: Wilhelmus Johannes Robertus Van Lier, Robert Steven Kawamoto, James Steven Edgar, Pramod Kumar Varma
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Publication number: 20150109265Abstract: This disclosure provides systems, methods and apparatus for an arrangement of pixels and interconnects in a display. In one aspect, polarities of pixels may be in a dot inversion configuration, or checkerboard pattern, to reduce the visibility of flicker. Various interconnect alternatively couple between modules in different columns or rows to provide dot inversion.Type: ApplicationFiled: October 21, 2013Publication date: April 23, 2015Applicant: QUALCOMM MEMS Technologies, Inc.Inventors: Edward Keat Leem Chan, Bing Wen, Cheonhong Kim, Wilhelmus Johannes Robertus Van Lier, Chih-Hsiang Ho, Rihui He, Ming-Hau Tung, Alok Govil, Jae Hyeong Seo
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Patent number: 8884940Abstract: A system for driving an array of display elements includes a supply line, at least one capacitor, a plurality of drive lines and overdrive lines, a plurality of switches and a controller configured to activate and deactivate subsets of the switches in order to selectively couple the at least one capacitor to the drive lines and to the overdrive lines. A method for generating an overdrive voltage includes activating and deactivating a plurality of switches to couple a drive voltage line and/or an overdrive voltage line to at least one capacitor.Type: GrantFiled: January 6, 2010Date of Patent: November 11, 2014Assignee: QUALCOMM MEMS Technologies, Inc.Inventors: Wilhelmus Johannes Robertus Van Lier, Pramod K. Varma
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Patent number: 8786592Abstract: Systems, methods and apparatus, including computer programs encoded on computer storage media, are used for driving a display. In one aspect, the method includes connecting a first segment line to a first voltage, connecting a second segment line to a second voltage, and connecting the least a first segment line to the second segment line through at least one inductor. The polarities of segment line voltages may therefore be switched by reusing energy in the system.Type: GrantFiled: October 13, 2011Date of Patent: July 22, 2014Assignee: Qualcomm MEMS Technologies, Inc.Inventor: Wilhelmus Johannes Robertus Van Lier
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Patent number: 8780104Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for calibrating display arrays. In one aspect, a method of calibrating a display array includes determining a particular drive response characteristic and updating a particular drive scheme voltage between updates of image data on the display array.Type: GrantFiled: October 21, 2011Date of Patent: July 15, 2014Assignee: Qualcomm MEMS Technologies, Inc.Inventors: Nao S. Chuei, Koorosh Aflatooni, Wilhelmus Johannes Robertus Van Lier, Pramod K. Varma, Ramesh K. Goel, Sameer Venugopal
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Patent number: 8775107Abstract: Methods and devices to measure voltage margins of electromechanical devices are disclosed. The voltage margins are determined based on responses to test voltages which cause the devices to change states. State changes of the devices are detected by monitoring integrated current or charge used to drive the devices with the test voltages.Type: GrantFiled: June 18, 2012Date of Patent: July 8, 2014Assignee: Qualcomm MEMS Technologies, Inc.Inventors: Alok Govil, Kostadin Djordjev, Alan Lewis, Wilhelmus Johannes Robertus Van Lier