Patents by Inventor Gabriel Gheorghe Marcu
Gabriel Gheorghe Marcu 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: 9361822Abstract: The present disclosure relates generally to systems and techniques for applying color adjustments to a display. In certain embodiments, the color adjustment techniques may be employed to transition current color correction values, which are based on a previously detected temperature of the display, to target correction values, which are based on a presently detected temperature of the display. Adjustment increments for each color channel of the display may be determined based on the color channel that has the largest difference between the current color correction value and the target color correction value. In particular, the number of adjustment steps may be determined so that the adjustment increment for each channel is less than or equal to a maximum adjustment increment.Type: GrantFiled: November 9, 2011Date of Patent: June 7, 2016Assignee: APPLE INC.Inventors: Kelsey Yukio Ho, Abhijit Bhattacharya, Christopher William Baldwin, Gabriel Gheorghe Marcu, Jesse Michael Devine
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Patent number: 8773451Abstract: Method and apparatus for adjusting the display characteristics of an electronic display, such as a computer or television display. The display is color corrected, e.g., at the factory, to measure its white point correction, gamma and gray tracking correction, and the gain correction over time as the display warms up. Moreover the white point correction and the gamma correction are performed on a per unit basis for each individual display to be manufactured. The resulting correction parameters are stored in memory or firmware associated with the display. Thereby when the display is in use, it performs compensation for white point, gray tracking and gain correction as the display warms up, each time it is powered up or when its thermal operation conditions change.Type: GrantFiled: May 3, 2011Date of Patent: July 8, 2014Assignee: Apple Inc.Inventors: Gabriel Gheorghe Marcu, Wei Chen, David W. Lum, Jean-Jacques P. Drolet
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Publication number: 20130113838Abstract: The present disclosure relates generally to systems and techniques for applying color adjustments to a display. In certain embodiments, the color adjustment techniques may be employed to transition current color correction values, which are based on a previously detected temperature of the display, to target correction values, which are based on a presently detected temperature of the display. Adjustment increments for each color channel of the display may be determined based on the color channel that has the largest difference between the current color correction value and the target color correction value. In particular, the number of adjustment steps may be determined so that the adjustment increment for each channel is less than or equal to a maximum adjustment increment.Type: ApplicationFiled: November 9, 2011Publication date: May 9, 2013Applicant: APPLE INC.Inventors: Kelsey Yukio Ho, Abhijit Bhattacharya, Christopher William Baldwin, Gabriel Gheorghe Marcu, Jesse Michael Devine
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Patent number: 8390644Abstract: Methods and apparatus for achieving color and luminance uniformity in color output devices. In one embodiment, measurements of luminance and chrominance are taken at various regions of the display surface for a range of color inputs. Using the collected data, a color volume is formed for each of the measured regions. This color volume comprises a set of all colors producible at the measured region. The color volumes for each of the measured regions are then used to generate a common color gamut, i.e., a volume of colors that are producible in each of the measured regions. A gamut mapping can then be performed for all or a portion of the positions on the display surface to a target color gamut. Input data for the gamut mapping process may be determined by conventional interpolative techniques.Type: GrantFiled: September 14, 2012Date of Patent: March 5, 2013Assignee: Apple Inc.Inventors: Gabriel Gheorghe Marcu, Wei Chen
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Publication number: 20130010012Abstract: Methods and apparatus for achieving color and luminance uniformity in color output devices. In one embodiment, measurements of luminance and chrominance are taken at various regions of the display surface for a range of color inputs. Using the collected data, a color volume is formed for each of the measured regions. This color volume comprises a set of all colors producible at the measured region. The color volumes for each of the measured regions are then used to generate a common color gamut, i.e., a volume of colors that are producible in each of the measured regions. A gamut mapping can then be performed for all or a portion of the positions on the display surface to a target color gamut. Input data for the gamut mapping process may be determined by conventional interpolative techniques.Type: ApplicationFiled: September 14, 2012Publication date: January 10, 2013Applicant: Apple Inc.Inventors: Gabriel Gheorghe Marcu, Wei Chen
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Publication number: 20120281008Abstract: Method and apparatus for adjusting the display characteristics of an electronic display, such as a computer or television display. The display is color corrected, e.g., at the factory, to measure its white point correction, gamma and gray tracking correction, and the gain correction over time as the display warms up. Moreover the white point correction and the gamma correction are performed on a per unit basis for each individual display to be manufactured. The resulting correction parameters are stored in memory or firmware associated with the display. Thereby when the display is in use, it performs compensation for white point, gray tracking and gain correction as the display warms up, each time it is powered up or when its thermal operation conditions change.Type: ApplicationFiled: May 3, 2011Publication date: November 8, 2012Inventors: Gabriel Gheorghe MARCU, Wei CHEN, David W. LUM, Jean-Jacques P. DROLET
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Patent number: 8289344Abstract: Methods and apparatus for achieving color and luminance uniformity in color output devices. In one embodiment, measurements of luminance and chrominance are taken at various regions of the display surface for a range of color inputs. Using the collected data, a color volume is formed for each of the measured regions. This color volume comprises a set of all colors producible at the measured region. The color volumes for each of the measured regions are then used to generate a common color gamut, i.e., a volume of colors that are producible in each of the measured regions. A gamut mapping can then be performed for all or a portion of the positions on the display surface to a target color gamut. Input data for the gamut mapping process may be determined by conventional interpolative techniques.Type: GrantFiled: September 11, 2008Date of Patent: October 16, 2012Assignee: Apple Inc.Inventors: Gabriel Gheorghe Marcu, Wei Chen
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Publication number: 20100060911Abstract: Methods and apparatus for achieving color and luminance uniformity in color output devices. In one embodiment, measurements of luminance and chrominance are taken at various regions of the display surface for a range of color inputs. Using the collected data, a color volume is formed for each of the measured regions. This color volume comprises a set of all colors producible at the measured region. The color volumes for each of the measured regions are then used to generate a common color gamut, i.e., a volume of colors that are producible in each of the measured regions. A gamut mapping can then be performed for all or a portion of the positions on the display surface to a target color gamut. Input data for the gamut mapping process may be determined by conventional interpolative techniques.Type: ApplicationFiled: September 11, 2008Publication date: March 11, 2010Applicant: Apple Inc.Inventors: Gabriel Gheorghe MARCU, Wei Chen