Patents by Inventor John H. Hong
John H. Hong 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: 20150070750Abstract: Some implementations described herein involve defining a viewing angle range, also referred to herein as a viewing cone. The viewing cone may be produced by an array of optical fibers on a display. The optical fiber array may include tapered optical fibers that are capable of increasing the amount of light transmitted through the optical fiber array. The optical fiber array may be a graded index optical fiber array, wherein the refractive index of the optical fiber cores varies along the axis of the optical fibers.Type: ApplicationFiled: October 17, 2013Publication date: March 12, 2015Applicant: QUALCOMM MEMS Technologies, Inc.Inventors: John H. Hong, Jian J. Ma, Bing Wen, Tallis Y. Chang
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Publication number: 20150066427Abstract: In some embodiments, methods and systems are provided for assisting a user in determining a real-world distance. Hardware-based sensors (e.g., present in a mobile electronic device) may allow for a fast low-power determination of distances. In one embodiment, one or more telemetry-related sensors may be incorporated into a device. For example, data detected by a frequently-calibrated integrated accelerometer may be used to determine a tilt of the device. A device height may be estimated based on empirical data or based on a time difference between a signal (e.g., a sonar signal) emitted towards the ground and a corresponding detected signal. A triangulation technique may use the estimated tilt and height to estimate other real-world distances (e.g., from the device to an endpoint or between endpoints).Type: ApplicationFiled: November 10, 2014Publication date: March 5, 2015Inventors: Sundeep Vaddadi, John H. Hong, Chong U. Lee
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Publication number: 20150022876Abstract: This disclosure provides systems, methods and apparatus for multi-state interferometric modulator (MS-IMOD) implementations with an improved white-state color by incorporating an attenuator. The attenuator may be part of a mirror stack or part of an absorber stack. The attenuator may be capable of reducing the amount of green light reflected when the MS-IMOD is in a white state. The attenuator may include an absorber and/or a notch filter. In some implementations, the white color that is reflected when the MS-IMOD is in the white state may be substantially similar to that of CIE Standard Illuminant D65.Type: ApplicationFiled: July 22, 2013Publication date: January 22, 2015Inventors: Jian J. Ma, Chong U. Lee, Tallis Young Chang, John H. Hong
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Patent number: 8886449Abstract: In some embodiments, methods and systems are provided for assisting a user in determining a real-world distance. Hardware-based sensors (e.g., present in a mobile electronic device) may allow for a fast low-power determination of distances. In one embodiment, one or more telemetry-related sensors may be incorporated into a device. For example, data detected by a frequently-calibrated integrated accelerometer may be used to determine a tilt of the device. A device height may be estimated based on empirical data or based on a time difference between a signal (e.g., a sonar signal) emitted towards the ground and a corresponding detected signal. A triangulation technique may use the estimated tilt and height to estimate other real-world distances (e.g., from the device to an endpoint or between endpoints).Type: GrantFiled: July 31, 2012Date of Patent: November 11, 2014Assignee: QUALCOMM IncorporatedInventors: Sundeep Vaddadi, John H. Hong, Chong U. Lee
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Patent number: 8879141Abstract: Methods and devices for calibrating and controlling the actuation of an analog interferometric modulator configured to have a plurality of actuation states. Devices and methods for calibrating an analog interferometric modulator to respond in linear relation to an applied voltage.Type: GrantFiled: November 14, 2013Date of Patent: November 4, 2014Assignee: Qualcomm MEMS Technologies, Inc.Inventors: Chong U. Lee, John H. Hong, Marc M. Mignard, Alok Govil
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Publication number: 20140266494Abstract: A particular device includes a replica circuit disposed above a dielectric substrate. The replica circuit includes a thin film transistor (TFT) configured to function as a variable capacitor or a variable resistor. The device further includes a transformer disposed above the dielectric substrate and coupled to the replica circuit. The transformer is configured facilitate an impedance match between the replica circuit and an antenna.Type: ApplicationFiled: March 14, 2013Publication date: September 18, 2014Applicant: QUALCOMM INCORPORATEDInventors: Je-Hsiung Lan, Chi Shun Lo, Jonghae Kim, Mario Francisco Velez, John H. Hong
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Publication number: 20140267443Abstract: This disclosure provides systems, methods and apparatus for increasing a range of stable travel positions of a movable layer within electromechanical systems (EMS) devices. In one aspect, an electrically isolated floating electrode can be disposed between a driving electrode within a movable layer and a fixed electrode in order to increase a stable travel range of the movable layer. By segmenting the electrically isolated floating electrode into multiple isolated electrode segments, unbalanced charge accumulation in response to tilting of the movable layer can be constrained to further increase the stable travel range of the movable layer.Type: ApplicationFiled: March 14, 2013Publication date: September 18, 2014Applicant: QUALCOMM MEMS Technologies, Inc.Inventors: Edward K. Chan, John H. Hong, Chong U. Lee, Isak C. Reines
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Publication number: 20140251947Abstract: A method of etching a glass substrate using an etchant that is reversibly activated to etch only in precise locations in which such etching is desired and is deactivated when outside of these locations. The method involves exposing a first side of the glass substrate to a mixture of chemical substances that includes a neutralized etchant that is photosensitive. The neutralized etchant is formed by reacting a neutralizer with an etchant. The method also includes transmitting light from a direction of a second side of the glass into the mixture of chemical substances. In response to exposure to this light, the etchant is reversibly released from a bond to the neutralizer to form the etchant on predetermined areas of the first side of the glass, wherein the predetermined areas are defined by the dimension of the light.Type: ApplicationFiled: March 10, 2013Publication date: September 11, 2014Applicant: QUALCOMM INCORPORATEDInventors: John H. HONG, Kenji NOMURA, Je-Hsiung LAN
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Publication number: 20140225910Abstract: Disclosed are methods and apparatus for color rendering in a binary high-dimensional output device, for example. The methods and apparatus are configured to receive color space data, and then map the received data to an intermediate color space. From this intermediated space, color rendering is performed using a pre-generated number of extended primary colors for temporal modulation. Each of the pre-generated extended primary colors is made up of a combination of at least two subframes with each subframe having a respective primary color. Through use of temporally modulated, pre-generated extended primaries in the color space, the methods and apparatus afford a reduction in the diffusion error for subsequent neighboring pixels yet to be rendered, particularly when using constrained devices such as binary high-dimensional output devices.Type: ApplicationFiled: February 13, 2013Publication date: August 14, 2014Applicant: QUALCOMM INCORPORATEDInventors: Huanzhao ZENG, Jian J. MA, John H. HONG, Chong U. LEE
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Publication number: 20140224971Abstract: Disclosed are methods and apparatus for subtractive image detection using interferometric subtractive color imaging. The methods and apparatus employ an electromagnetic wave reflecting device, and at least one photoresponsive detector at either a fixed or variable distance from one another, with a gap in between, that may include a dielectric. The distance is set such that the detector is positioned at one or more zero nodes of standing electromagnetic waves resultant from incident electromagnetic waves reflected by the reflecting device. The zero node of the electromagnetic wave will corresponds to a zero energy point of a particular frequency of the electromagnetic wave. By using interferometric detection, less loss of light may be achieved, and positioning the detector at known zero energy points for known light frequencies, affords subtractive detection, which reduces computational complexity.Type: ApplicationFiled: February 13, 2013Publication date: August 14, 2014Applicant: QUALCOMM MEMS Technologies, Inc.Inventor: John H. HONG
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Publication number: 20140218786Abstract: This disclosure provides systems, methods and apparatus for providing white light color output from an electromechanical systems (EMS) device with reduced likelihood of stiction. In one aspect, interferometric modulators are configured to provide a white color output while having a non-zero modulator gap dimension. Such a feature can reduce problems associated with zero modulator gap dimensions such as stiction. Various methodologies can be used to yield such a non-zero modulator gap and a white color output. In some implementations, for example, an optical element that introduced wavelength dependent phase shift is used. In some implementations this wavelength dependent phase shifting optical element includes a stack of color filters, a hologram, a diffraction grating, or layers of material having specific thicknesses and wavelength dependent indices of refraction.Type: ApplicationFiled: January 31, 2014Publication date: August 7, 2014Applicant: QUALCOMM MEMS Technologies, Inc.Inventors: John H. Hong, Marc Maurice Mignard
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Patent number: 8797632Abstract: This disclosure provides systems, methods, and devices for actuating, charging and calibrating the charge on a movable electrode in electromechanical systems (EMS) devices. The electromechanical systems device can include a first electrode, a second electrode spaced apart from the first electrode by a gap, a complementary electrode, at least one electrical contact, and a movable third electrode disposed between the first electrode and the second electrode. In one implementation, a method of calibrating charge on the movable electrode of the EMS device includes electrically connecting a complementary electrode to the first electrode to form a compound electrode and applying a calibration voltage across the compound electrode and the second electrode to produce a uniform electric field in the gap. Under the electric field the third electrode moves towards the first electrode until it connects with the at least one electrical contact.Type: GrantFiled: August 16, 2011Date of Patent: August 5, 2014Assignee: QUALCOMM MEMS Technologies, Inc.Inventors: John H. Hong, Chong U. Lee
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Publication number: 20140204425Abstract: Subdividing a color space is described for vector error diffusion which includes obtaining color coordinates for each primary color in the color space, and comparing the color coordinates to a threshold value for each coordinate plane of the color space. In response to the comparing, each primary color is grouped into a quadrant of the color space, wherein each quadrant is defined by the threshold value for each coordinate plane. In other aspects, a mapping a color to a closet primary color is described in a color space that includes a display determining color coordinates of the color and identifying a matching quadrant of a plurality of quadrants dividing the color space, wherein the determined color coordinates fall within the matching quadrant. A representative display device searches for the closest primary color within the matching quadrant and maps the color to the closest primary color found.Type: ApplicationFiled: January 20, 2013Publication date: July 24, 2014Applicant: QUALCOMM IncorporatedInventors: Huanzhao ZENG, Chong U. LEE, John H. HONG
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Publication number: 20140198128Abstract: A method, an apparatus, and a computer program product for modulating optics in a display are provided. An apparatus forms a plurality of zone plates in a liquid crystal using electric fields. Each zone plate has a center, and the centers are aligned along a first axis of the display. The apparatus moves the plurality of zone plates in a first direction along a second axis of the display different from the first axis of the display, while maintaining alignment of the centers of the plurality of zone plates along the first axis. Such movement is provided through repositioning of electric fields through the liquid crystal.Type: ApplicationFiled: January 13, 2013Publication date: July 17, 2014
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Patent number: 8760751Abstract: This disclosure provides systems, methods and apparatus related to an electromechanical display device. In one aspect, an analog interferometric modulator (AIMOD) includes a reflective display pixel having a movable reflective layer and a stationary absorber layer, the reflective layer and absorber layer defining a cavity therebetween. A color notch filter may be employed to produce an improved white state. In some implementations, the color notch filter is positioned on a side of the substrate opposite the absorber layer. In some other implementations, the color notch filter is positioned between the substrate and the movable reflective layer.Type: GrantFiled: January 26, 2012Date of Patent: June 24, 2014Assignee: Qualcomm Mems Technologies, Inc.Inventors: Jian J. Ma, Tallis Y. Chang, John H. Hong, Ion Bita
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Patent number: 8717660Abstract: This disclosure provides systems, methods and apparatus for enhancing the brightness and/or contrast ratio of display devices. In one aspect, the display devices can include an annular diffuser that is configured to scatter light into a ring shaped region. The annular diffuser can include a plurality of axicon lenses or holographic features. The reflective display can include an annular diffuser to shift the direction along which most of the modulated light is scattered away from the direction along which light is specularly reflected by the display devices to reduce specular glare and enhance brightness and/or contrast ratio.Type: GrantFiled: July 3, 2012Date of Patent: May 6, 2014Assignee: QUALCOMM MEMS Technologies, Inc.Inventors: Jian J. Ma, John H. Hong, Bing Wen
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Publication number: 20140118829Abstract: The various embodiments include a near-eye display having a transmissive display and a diffractive micro-lens array. The transmissive display may be positioned relative to the diffractive micro-lens array so that the distance between the transmissive display and the diffractive micro-lens array is be approximately equal to focal length of the diffractive micro-lens array. The transmissive display may also be positioned relative to the diffractive micro-lens array so that a percentage of light emitted from the transmissive display is diffracted by the micro-lens array and collimated into focus on a retina of a human eye. The transmissive display may be further positioned relative to the diffractive micro-lens array so that light from a real world scene passes through transparent portions of the transmissive display and is diffracted by the micro-lens array out of focus of the human eye.Type: ApplicationFiled: October 26, 2012Publication date: May 1, 2014
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Publication number: 20140118360Abstract: This disclosure provides systems, methods and apparatus for absorption film stacks. In one aspect, the absorption film stack is an interferometric absorption film stack that, for a selected wavelength of light, reduces light reflected from a surface of the stack by setting up a standing wave within the stack of materials. In some implementations, an absorbing layer may be placed at the peak of the standing wave interference pattern. The absorbing layer can be implemented to absorb selected wavelengths of light and substantially reduce the amount of unwanted reflections. In some other implementations, a reflective surface may be formed on the surface of the stack opposite the absorbing layer.Type: ApplicationFiled: October 30, 2012Publication date: May 1, 2014Applicant: PIXTRONIX, INC.Inventors: Jian J. Ma, John H. Hong, Tallis Y. Chang, Chong U. Lee
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Patent number: 8706711Abstract: Various arrangements for using a k-dimensional tree for a search are presented. A plurality of descriptors may be stored. Each of the plurality of descriptors stored is linked with a first number of stored dimensions. The search may be performed using the k-dimensional tree for one or more query descriptors that at least approximately match one or more of the plurality of descriptors linked with the first number of stored dimensions. The k-dimensional tree may be built using the plurality of descriptors wherein each of the plurality of descriptors is linked with a second number of dimensions when the k-dimensional tree is built. The second number of dimensions may be a greater number of dimensions than the first number of stored dimensions.Type: GrantFiled: December 29, 2011Date of Patent: April 22, 2014Assignee: QUALCOMM IncorporatedInventors: Sundeep Vaddadi, Onur C. Hamsici, John H. Hong, Yuriy Reznik, Chong U. Lee
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Patent number: 8705876Abstract: A method for feature matching in image recognition is provided. First, image scaling may be based on a feature distribution across scale spaces for an image to estimate image size/resolution, where peak(s) in the keypoint distribution at different scales is used to track a dominant image scale and roughly track object sizes. Second, instead of using all detected features in an image for feature matching, keypoints may be pruned based on cluster density and/or the scale level in which the keypoints are detected. Keypoints falling within high-density clusters may be preferred over features falling within lower density clusters for purposes of feature matching. Third, inlier-to-outlier keypoint ratios are increased by spatially constraining keypoints into clusters in order to reduce or avoid geometric consistency checking for the image.Type: GrantFiled: December 2, 2010Date of Patent: April 22, 2014Assignee: QUALCOMM IncorporatedInventors: Sundeep Vaddadi, John H. Hong, Onur C. Hamsici, Yuriy Reznik, Chong U. Lee