Patents by Inventor Kostadin Djordjev
Kostadin Djordjev 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: 20200160018Abstract: The described architecture and techniques may provide for ultrasonic sensing using transmit and receive beamforming using an ultrasonic sensor with a continuous (e.g., non-segmented) blanket layer of piezo-sensitive material between a common electrode and an array of electrodes. For example, an ultrasonic biometric sensor may utilize a continuous blanket layer of piezo-sensitive material (e.g., such as a continuous copolymer, in lieu of an array of piezoelectric elements) between a common electrode and an electrode array for transmit and receive beamforming. The electrode array may employ individual transmission cycle control for each electrode to perform aspects of ultrasonic transmit and receive beamforming for biometric sensing/imaging. The continuous copolymer (e.g.Type: ApplicationFiled: November 21, 2018Publication date: May 21, 2020Inventors: Hrishikesh Panchawagh, Kostadin Djordjev
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Patent number: 8848294Abstract: Various embodiments include an interferometric modulator device configured to provide improved saturation. In some embodiments, saturation is improved by optically matching the impedance of two materials with different refractive indices using a multilayer having a refractive index gradient. In various embodiments, the thickness one or more of the layers in the multilayer are selected to provide increased saturation. Accordingly, in various embodiments the multilayer having a refractive index gradient helps to narrow the resonance of a pixel such that the band of wavelengths that are reflected from the pixel is smaller. In turn, a device including a combination of red, green and blue pixels may expand the spectrum of colors that are reflected by the device in operation. Additionally, there may be better contrast between whites and blacks, as darker blacks with less hue are produced.Type: GrantFiled: October 22, 2010Date of Patent: September 30, 2014Assignee: QUALCOMM MEMS Technologies, Inc.Inventors: Jian Liu, Kostadin Djordjev, Marc Maurice Mignard
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Patent number: 8803861Abstract: This disclosure provides systems, methods and apparatus for EMS devices. In one aspect, an EMS device includes an array of display elements and a plurality of driver lines with at least a portion of the plurality of driver lines routed above or below the array between one or more driver circuits and the array. In some implementations, at least a portion of the plurality of driver lines is disposed above a non-active area of the array. In one aspect, an EMS device can form a portion of at least one of the plurality of driver lines. In some implementations, movable layers of the array can be disposed between at least a portion of the plurality of driver lines and stationary electrodes of the display.Type: GrantFiled: February 23, 2012Date of Patent: August 12, 2014Assignee: QUALCOMM MEMS Technologies, Inc.Inventors: Tsongming Kao, Charles Leu, Kostadin Djordjev, Rihui He
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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
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Patent number: 8560258Abstract: 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: October 15, 2013Assignee: QUALCOMM MEMS Technologies, Inc.Inventors: Alok Govil, Kostadin Djordjev, Alan Lewis, Wilhelmus Johannes Robertus Van Lier
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Publication number: 20130222351Abstract: This disclosure provides systems, methods and apparatus for EMS devices. In one aspect, an EMS device includes an array of display elements and a plurality of driver lines with at least a portion of the plurality of driver lines routed above or below the array between one or more driver circuits and the array. In some implementations, at least a portion of the plurality of driver lines is disposed above a non-active area of the array. In one aspect, an EMS device can form a portion of at least one of the plurality of driver lines. In some implementations, movable layers of the array can be disposed between at least a portion of the plurality of driver lines and stationary electrodes of the display.Type: ApplicationFiled: February 23, 2012Publication date: August 29, 2013Applicant: QUALCOMM MEMS Technologies, Inc.Inventors: Tsongming Kao, Charles Leu, Kostadin Djordjev, Rihui He
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Patent number: 8446674Abstract: Various embodiments include an interferometric modulator device configured to provide improved saturation. In some embodiments, saturation is improved by optically matching the impedance of two materials with different refractive indices using a multilayer having a refractive index gradient. In various embodiments, the thickness one or more of the layers in the multilayer are selected to provide increased saturation. Accordingly, in various embodiments the multilayer having a refractive index gradient helps to narrow the resonance of a pixel such that the band of wavelengths that are reflected from the pixel is smaller. In turn, a device including a combination of red, green and blue pixels may expand the spectrum of colors that are reflected by the device in operation. Additionally, there may be better contrast between whites and blacks, as darker blacks with less hue are produced.Type: GrantFiled: October 22, 2010Date of Patent: May 21, 2013Assignee: Qualcomm Mems Technologies, Inc.Inventors: Jian Liu, Kostadin Djordjev, Marc Maurice Mignard
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Publication number: 20130088498Abstract: Systems, methods and apparatus are provided for electromechanical systems devices having a non-uniform gap under a mechanical layer. An electromechanical systems device includes a movable element supported at its edges over a substrate by at least two support structures. The movable element can be spaced from the substrate by a gap having two or more different heights in two or more corresponding distinct regions. The gap has a first height in a first region below the gap, such as an active area of the device, and a second height in a second region adjacent the support structure. In an interferometric modulator implementation, the second region can be encompasses within an anchor region with a black mask.Type: ApplicationFiled: October 7, 2011Publication date: April 11, 2013Applicant: QUALCOMM MEMS Technologies, Inc.Inventors: Yi Tao, Kostadin Djordjev, Fan Zhong
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Patent number: 8355883Abstract: 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: January 15, 2013Assignee: QUALCOMM MEMS Technologies, Inc.Inventors: Alok Govil, Kostadin Djordjev, Alan Lewis, Wilhelmus Johannes Robertus Van Lier
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Publication number: 20120256615Abstract: 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: ApplicationFiled: June 18, 2012Publication date: October 11, 2012Applicant: QUALCOMM MEMS TECHNOLOGIES, INC.Inventors: Alok Govil, Kostadin Djordjev, Alan Lewis, Wilhelmus Johannes Robertus Van Lier
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Publication number: 20120249122Abstract: 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: ApplicationFiled: June 18, 2012Publication date: October 4, 2012Applicant: QUALCOMM MEMS TECHNOLOGIES, INC.Inventors: Alok Govil, Kostadin Djordjev, Alan Lewis, Wilhelmus Johannes Robertus Van Lier
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Patent number: 8204703Abstract: Methods and devices to measure threshold voltages of electro-mechanical systems devices are disclosed. The threshold voltages are determined based on which of multiple test voltages cause the devices to change states. State changes of the device are detected by monitoring integrated current or charge used to drive the test voltages.Type: GrantFiled: February 11, 2009Date of Patent: June 19, 2012Assignee: QUALCOMM MEMS Technologies, Inc.Inventors: Alok Govil, Kostadin Djordjev, Alan Lewis, Wilhelmus Johannes Robertus Van Lier
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Patent number: 8111262Abstract: Methods are described for selecting reflective layer distances in an interferometric modulator display that result in reduced color sensitivity to temperature and process variation. Colors are selected for interferometric modulator subpixels that correspond to a minimum in the rate that the colors change with respect to reflective layer distance. In some cases, colors are selected that deviate from the minimums in order to obtain a desired target color (e.g., a desired white point).Type: GrantFiled: May 18, 2007Date of Patent: February 7, 2012Assignee: QUALCOMM MEMS Technologies, Inc.Inventors: Kostadin Djordjev, Kasra Khazeni, Alok Govil
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Patent number: 8068269Abstract: An interferometric modulating device is provided with a spacing layer positioned between the fixed reflector and the electrode. The spacing layer prevents shorting between the movable reflector and the electrode and provides a filtering cavity to improve color saturation.Type: GrantFiled: September 24, 2009Date of Patent: November 29, 2011Assignee: QUALCOMM MEMS Technologies, Inc.Inventor: Kostadin Djordjev
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Publication number: 20110286072Abstract: Various embodiments include an interferometric modulator device configured to provide improved saturation. In some embodiments, saturation is improved by optically matching the impedance of two materials with different refractive indices using a multilayer having a refractive index gradient. In various embodiments, the thickness one or more of the layers in the multilayer are selected to provide increased saturation. Accordingly, in various embodiments the multilayer having a refractive index gradient helps to narrow the resonance of a pixel such that the band of wavelengths that are reflected from the pixel is smaller. In turn, a device including a combination of red, green and blue pixels may expand the spectrum of colors that are reflected by the device in operation. Additionally, there may be better contrast between whites and blacks, as darker blacks with less hue are produced.Type: ApplicationFiled: October 22, 2010Publication date: November 24, 2011Applicant: QUALCOMM MEMS TECHNOLOGIES, INC.Inventors: Jian Liu, Kostadin Djordjev, Marc Maurice Mignard
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Patent number: 7760979Abstract: In one embodiment, there is disclosed a waveguide medium using total internal reflection to create a relatively sharp (approximately 90°) bend for optical signals traversing the waveguide. A discontinuity of the medium (such as air) is used to create a turning mirror within the waveguide path. By curving the discontinuity, the entire input optical signal is focused into the output portion of the waveguide, thereby compensating for the diffraction loss of the optical signal at the bend. In one embodiment in order to facilitate proper alignment of the masks certain portions of the waveguide on a first mask are extended (widened) beyond their optimum physical size. This extended portion is then used to position an edge of a second mask, such that optical signal scatter caused by the extended portions of the waveguide are compensated for by adjusting the curvature.Type: GrantFiled: February 17, 2005Date of Patent: July 20, 2010Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.Inventors: Chao-Kun Lin, Kostadin Djordjev, Michael Renne Ty Tan
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Patent number: 7688452Abstract: Air gap variation in an interferometric modulator over a two-dimensional spatial map of the modulator is determined by acquiring a digital photograph of the modulator. Color parameters of individual pixels in the photograph are determined and compared to a model of color parameters as a function of air gap distance. The model and individual pixel color parameters may be plotted on a color space plot for comparison. The determined distances may be plotted over a two-dimensional spatial map of the interferometric modulator to visualize the mirror curvature and air gap variation.Type: GrantFiled: May 7, 2008Date of Patent: March 30, 2010Assignee: Qualcomm Mems Technologies, Inc.Inventor: Kostadin Djordjev
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Publication number: 20100014148Abstract: An interferometric modulating device is provided with a spacing layer positioned between the fixed reflector and the electrode. The spacing layer prevents shorting between the movable reflector and the electrode and provides a filtering cavity to improve color saturation.Type: ApplicationFiled: September 24, 2009Publication date: January 21, 2010Applicant: QUALCOMM MEMS Technologies, Inc.Inventor: Kostadin Djordjev
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Patent number: 7612933Abstract: An interferometric modulating device is provided with a spacing layer positioned between the fixed reflector and the electrode. The spacing layer prevents shorting between the movable reflector and the electrode and provides a filtering cavity to improve color saturation.Type: GrantFiled: March 27, 2008Date of Patent: November 3, 2009Assignee: Qualcomm MEMS Technologies, Inc.Inventor: Kostadin Djordjev
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Publication number: 20090244686Abstract: An interferometric modulating device is provided with a spacing layer positioned between the fixed reflector and the electrode. The spacing layer prevents shorting between the movable reflector and the electrode and provides a filtering cavity to improve color saturation.Type: ApplicationFiled: March 27, 2008Publication date: October 1, 2009Applicant: QUALCOMM MEMS Technologies, Inc.Inventor: Kostadin Djordjev