Patents by Inventor Nino Zahirovic
Nino Zahirovic 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: 20170316729Abstract: A method and system control an OLED display to achieve desired color points and brightness levels in an array of pixels in which each pixel includes at least three sub-pixels having different colors and at least one white sub-pixel. The method and system select a plurality of reference points in the pixel content domain with known color points and brightness levels. For each set of three sub-pixels of different colors, the method and system determine the share of each sub-pixel to produce the color point and brightness level of each selected reference point, and select the maximum share determined for each sub-pixel as peak brightness needed from that sub-pixel.Type: ApplicationFiled: July 18, 2017Publication date: November 2, 2017Inventors: Allyson Giannikouris, Jaimal Soni, Nino Zahirovic, Ricky Yik Hei Ngan, Gholamreza Chaji
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Patent number: 9799246Abstract: A system reads a desired circuit parameter from a pixel circuit that includes a light emitting device, a drive device to provide a programmable drive current to the light emitting device, a programming input, and a storage device to store a programming signal. One embodiment of the extraction system turns off the drive device and supplies a predetermined voltage from an external source to the light emitting device, discharges the light emitting device until the light emitting device turns off, and then reads the voltage on the light emitting device while that device is turned off. The voltages on the light emitting devices in a plurality of pixel circuits may be read via the same external line, at different times.Type: GrantFiled: December 2, 2013Date of Patent: October 24, 2017Assignee: Ignis Innovation Inc.Inventors: Gholamreza Chaji, Ricky Yik Hei Ngan, Nino Zahirovic, Yaser Azizi
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Publication number: 20170287398Abstract: The OLED voltage of a selected pixel is extracted from the pixel produced when the pixel is programmed so that the pixel current is a function of the OLED voltage. One method for extracting the OLED voltage is to first program the pixel in a way that the current is not a function of OLED voltage, and then in a way that the current is a function of OLED voltage. During the latter stage, the programming voltage is changed so that the pixel current is the same as the pixel current when the pixel was programmed in a way that the current was not a function of OLED voltage. The difference in the two programming voltages is then used to extract the OLED voltage.Type: ApplicationFiled: June 22, 2017Publication date: October 5, 2017Inventors: Jaimal Soni, Ricky Yik Hei Ngan, Gholamreza Chaji, Nino Zahirovic, Joseph Marcel Dionne
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Patent number: 9741282Abstract: A method and system control an OLED display to achieve desired color points and brightness levels in an array of pixels in which each pixel includes at least three sub-pixels having different colors and at least one white sub-pixel. The method and system select a plurality of reference points in the pixel content domain with known color points and brightness levels. For each set of three sub-pixels of different colors, the method and system determine the share of each sub-pixel to produce the color point and brightness level of each selected reference point, and select the maximum share determined for each sub-pixel as peak brightness needed from that sub-pixel.Type: GrantFiled: December 5, 2014Date of Patent: August 22, 2017Assignee: Ignis Innovation Inc.Inventors: Allyson Giannikouris, Jaimal Soni, Nino Zahirovic, Ricky Yik Hei Ngan, Gholamreza' Chaji
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Patent number: 9721512Abstract: The OLED voltage of a selected pixel is extracted from the pixel produced when the pixel is programmed so that the pixel current is a function of the OLED voltage. One method for extracting the OLED voltage is to first program the pixel in a way that the current is not a function of OLED voltage, and then in a way that the current is a function of OLED voltage. During the latter stage, the programming voltage is changed so that the pixel current is the same as the pixel current when the pixel was programmed in a way that the current was not a function of OLED voltage. The difference in the two programming voltages is then used to extract the OLED voltage.Type: GrantFiled: March 22, 2016Date of Patent: August 1, 2017Assignee: Ignis Innovation Inc.Inventors: Jaimal Soni, Ricky Yik Hei Ngan, Gholamreza Chaji, Nino Zahirovic, Joseph Marcel Dionne
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Publication number: 20160335952Abstract: A system uses image data, representing images to be displayed in successive frames, to drive a display having pixels that include a drive transistor and an organic light emitting device by dividing each frame into at least first and second sub-frames, supplying the image data during one of the sub-frames, supplying compensation data during the other of the sub-frames, compensating image data based on the compensation data, and supplying each pixel with a drive current that is based on the compensated image data during each frame. The compensated image data may be supplied from a driver having a preselected data resolution, and the system determines whether the compensated image data is greater than the data resolution of the driver, and if the compensated image data is greater than the data resolution of the driver, transfers the excess compensated image data to a different sub-frame.Type: ApplicationFiled: July 26, 2016Publication date: November 17, 2016Inventors: Gholamreza Chaji, Nino Zahirovic
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Patent number: 9437137Abstract: A system uses image data, representing images to be displayed in successive frames, to drive a display having pixels that include a drive transistor and an organic light emitting device by dividing each frame into at least first and second sub-frames, supplying the image data during one of the sub-frames, supplying compensation data during the other of the sub-frames, compensating image data based on the compensation data, and supplying each pixel with a drive current that is based on the compensated image data during each frame. The compensated image data may be supplied from a driver having a preselected data resolution, and the system determines whether the compensated image data is greater than the data resolution of the driver, and if the compensated image data is greater than the data resolution of the driver, transfers the excess compensated image data to a different sub-frame.Type: GrantFiled: August 11, 2014Date of Patent: September 6, 2016Assignee: Ignis Innovation Inc.Inventors: Gholamreza Chaji, Nino Zahirovic
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Publication number: 20160203766Abstract: The OLED voltage of a selected pixel is extracted from the pixel produced when the pixel is programmed so that the pixel current is a function of the OLED voltage. One method for extracting the OLED voltage is to first program the pixel in a way that the current is not a function of OLED voltage, and then in a way that the current is a function of OLED voltage. During the latter stage, the programming voltage is changed so that the pixel current is the same as the pixel current when the pixel was programmed in a way that the current was not a function of OLED voltage. The difference in the two programming voltages is then used to extract the OLED voltage.Type: ApplicationFiled: March 22, 2016Publication date: July 14, 2016Inventors: Jaimal Soni, Ricky Yik Hei Ngan, Gholamreza Chaji, Nino Zahirovic, Joseph Marcel Dionne
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Patent number: 9324268Abstract: The OLED voltage of a selected pixel is extracted from the pixel produced when the pixel is programmed so that the pixel current is a function of the OLED voltage. One method for extracting the OLED voltage is to first program the pixel in a way that the current is not a function of OLED voltage, and then in a way that the current is a function of OLED voltage. During the latter stage, the programming voltage is changed so that the pixel current is the same as the pixel current when the pixel was programmed in a way that the current was not a function of OLED voltage. The difference in the two programming voltages is then used to extract the OLED voltage.Type: GrantFiled: March 11, 2014Date of Patent: April 26, 2016Assignee: Ignis Innovation Inc.Inventors: Jaimal Soni, Ricky Yik Hei Ngan, Gholamreza Chaji, Nino Zahirovic, Joseph Marcel Dionne
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Patent number: 9280933Abstract: A system extracts effective parameters from a pixel circuit that includes a light emitting device, a drive device to provide a programmable drive current to the light emitting device, a programming input, and a storage device to store a programming signal. The system measures the value of at least one operating parameter of the pixel circuit at a plurality of levels, and then extracts the value of at least one related parameter of the pixel circuit, based on the measured values of the at least one operating parameter. The measured values of the operating parameter are translated to effective values for driving the pixel circuit, based on the extracted value. Then effective parameters for driving effective devices in the pixel circuit are extracted, based on the translated values, and stored for use in compensating input signals to the pixel circuit.Type: GrantFiled: April 25, 2014Date of Patent: March 8, 2016Assignee: Ignis Innovation Inc.Inventors: Gholamreza Chaji, Ricky Yik Hei Ngan, Nino Zahirovic, Yaser Azizi, Arokia Nathan, Ali Ghadiri Bayekolaee
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Patent number: 9275579Abstract: A system and method for extracting a parasitic capacitance value from a pixel circuit including a light emitting device, a drive device to provide a programmable drive current to the light emitting device, a programming input, and a storage device to store a programming signal. The system and method determine the biasing voltage of an internal node of the pixel circuit during a driving cycle for a desired measurement level, and modify voltages of the pixel circuit that do not affect said biasing voltage to eliminate unwanted cross talk. In different implementations, the biasing voltage is determined by measuring the voltage at an internal node, or by calculating the voltage at the internal node.Type: GrantFiled: April 15, 2014Date of Patent: March 1, 2016Assignee: Ignis Innovation Inc.Inventors: Gholamreza Chaji, Ricky Yik Hei Ngan, Nino Zahirovic, Yaser Azizi
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Publication number: 20160027382Abstract: A voltage-programmed display system allows measurement of effects on pixels in a panel that includes both active pixels and reference pixels coupled to a supply line and a programming line. The reference pixels are controlled so that they are not subject to substantial changes due to aging and operating conditions over time. A readout circuit is coupled to the active pixels and the reference pixels for reading at least one of current, voltage or charge from the pixels when they are supplied with known input signals. The readout circuit is subject to changes due to aging and operating conditions over time, but the readout values from the reference pixels are used to adjust the readout values from the active pixels to compensate for the unwanted effects.Type: ApplicationFiled: April 23, 2014Publication date: January 28, 2016Inventors: Gholamreza Chaji, Joseph Marcel Dionne, Yaser Azizi, Javid Jaffari, Abbas Hormati, Tong Liu, Vladislav Muravin, Jaimal Soni, Nino Zahirovic, Stephan Alexander
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Patent number: 9171504Abstract: Systems and methods detect and compensate for process or performance-related non-uniformities and/or degradation in displays. The systems and methods can compare a device current with one or more reference currents to generate an output signal indicative of the difference between the device and reference currents. This output voltage can be amplified, and quantized and then be used to determine how the device current differs from the reference current and to adjust the programming voltage for the device of interest accordingly.Type: GrantFiled: January 14, 2014Date of Patent: October 27, 2015Assignee: Ignis Innovation Inc.Inventors: Yaser Azizi, Joseph Marcel Dionne, Nino Zahirovic, Gholamreza Chaji
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Publication number: 20150161935Abstract: A method and system control an OLED display to achieve desired color points and brightness levels in an array of pixels in which each pixel includes at least three sub-pixels having different colors and at least one white sub-pixel. The method and system select a plurality of reference points in the pixel content domain with known color points and brightness levels. For each set of three sub-pixels of different colors, the method and system determine the share of each sub-pixel to produce the color point and brightness level of each selected reference point, and select the maximum share determined for each sub-pixel as peak brightness needed from that sub-pixel.Type: ApplicationFiled: December 5, 2014Publication date: June 11, 2015Inventors: Allyson Giannikouris, Jaimal Soni, Nino Zahirovic, Ricky Yik Hei Ngan, Gholamreza` Chaji
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Publication number: 20150103106Abstract: A system for equalizing the pixels in an array of pixels that include semiconductor devices that age differently under different ambient and stress conditions. The system extracts at least one pixel parameter from the array; creates a stress pattern for the array, based on the extracted pixel parameter; stresses the pixels in accordance with the stress pattern; extracts the pixel parameter from the stressed pixels; determines whether the pixel parameter extracted from the stressed pixels is within a preselected range and, when the answer is negative, creates a second stress pattern for the array, based on the pixel parameter extracted from the stressed pixels, stresses the pixels in accordance with the second stress pattern, extracts the pixel parameter from the stressed pixels, and determines whether the pixel parameter extracted from the stressed pixels is within the preselected range.Type: ApplicationFiled: January 6, 2015Publication date: April 16, 2015Inventors: Gholamreza Chaji, Ricky Yik Hei Ngan, Nino Zahirovic
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Publication number: 20150042703Abstract: A system uses image data, representing images to be displayed in successive frames, to drive a display having pixels that include a drive transistor and an organic light emitting device by dividing each frame into at least first and second sub-frames, supplying the image data during one of the sub-frames, supplying compensation data during the other of the sub-frames, compensating image data based on the compensation data, and supplying each pixel with a drive current that is based on the compensated image data during each frame. The compensated image data may be supplied from a driver having a preselected data resolution, and the system determines whether the compensated image data is greater than the data resolution of the driver, and if the compensated image data is greater than the data resolution of the driver, transfers the excess compensated image data to a different sub-frame.Type: ApplicationFiled: August 11, 2014Publication date: February 12, 2015Inventors: Gholamreza Chaji, Nino Zahirovic
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Publication number: 20140313111Abstract: A system for compensating the input signals to arrays of pixels that include semiconductor devices that age differently under different ambient and stress conditions. The system creates a library of compensation curves for different stress conditions of the semiconductor devices; identifies the stress conditions for at least a selected one of the semiconductor devices based on the rate of change or absolute value of at least one parameter of at least the selected device; selects a compensation curve for the selected device based on the identified stress conditions; calculates compensation parameters for the selected device based on the selected compensation curve; and compensates an input signal for the selected device based on the calculated compensation parameters.Type: ApplicationFiled: July 2, 2014Publication date: October 23, 2014Inventors: Gholamreza Chaji, Ricky Yik Hei Ngan, Nino Zahirovic
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Publication number: 20140285407Abstract: A system extracts effective parameters from a pixel circuit that includes a light emitting device, a drive device to provide a programmable drive current to the light emitting device, a programming input, and a storage device to store a programming signal. The system measures the value of at least one operating parameter of the pixel circuit at a plurality of levels, and then extracts the value of at least one related parameter of the pixel circuit, based on the measured values of the at least one operating parameter. The measured values of the operating parameter are translated to effective values for driving the pixel circuit, based on the extracted value. Then effective parameters for driving effective devices in the pixel circuit are extracted, based on the translated values, and stored for use in compensating input signals to the pixel circuit.Type: ApplicationFiled: April 25, 2014Publication date: September 25, 2014Applicant: Ignis Innovation Inc.Inventors: Gholamreza Chaji, Ricky Yik Hei Ngan, Nino Zahirovic, Yaser Azizi, Arokia Nathan, Peyman Servati, Ali Ghadiri Bayekolaee
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Publication number: 20140267215Abstract: The OLED voltage of a selected pixel is extracted from the pixel produced when the pixel is programmed so that the pixel current is a function of the OLED voltage. One method for extracting the OLED voltage is to first program the pixel in a way that the current is not a function of OLED voltage, and then in a way that the current is a function of OLED voltage. During the latter stage, the programming voltage is changed so that the pixel current is the same as the pixel current when the pixel was programmed in a way that the current was not a function of OLED voltage. The difference in the two programming voltages is then used to extract the OLED voltage.Type: ApplicationFiled: March 11, 2014Publication date: September 18, 2014Applicant: Ignis Innovation Inc.Inventors: Jaimal Soni, Ricky Yik Hei Ngan, Gholamreza Chaji, Nino Zahirovic, Joseph Marcel Dionne
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Publication number: 20140225883Abstract: A system and method for extracting a parasitic capacitance value from a pixel circuit including a light emitting device, a drive device to provide a programmable drive current to the light emitting device, a programming input, and a storage device to store a programming signal. The system and method determine the biasing voltage of an internal node of the pixel circuit during a driving cycle for a desired measurement level, and modify voltages of the pixel circuit that do not affect said biasing voltage to eliminate unwanted cross talk. In different implementations, the biasing voltage is determined by measuring the voltage at an internal node, or by calculating the voltage at the internal node.Type: ApplicationFiled: April 15, 2014Publication date: August 14, 2014Applicant: Ignis Innovation Inc.Inventors: Gholamreza Chaji, Ricky Yik Hei Ngan, Nino Zahirovic, Yaser Azizi, Arokia Nathan, Peyman Servati