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Haifeng Li

Haifeng Li, Phoenix, AZ US

Patent application numberDescriptionPublished
20110050394SYSTEMS AND METHODS FOR PRESSURE-BASED AUTHENTICATION OF AN INPUT ON A TOUCH SCREEN - Systems and methods are provided for authenticating an input on a touch screen. A method comprises obtaining one or more pressure metrics for an input by a user on a touch screen that is being proffered as that of a known user. Each pressure metric corresponds to a pressure applied to the touch screen by the user at a respective impression location of the input. The method further comprises authenticating the user as the known user based at least in part on the one or more pressure metrics.03-03-2011
20110050588METHODS AND APPARATUS FOR PRESSURE-BASED MANIPULATION OF CONTENT ON A TOUCH SCREEN - Methods and apparatus are provided for manipulating content displayed on a touch screen utilizing a transparent pressure-sensing touch panel. A method comprises displaying content on the touch screen and obtaining one or more pressure metrics for an input gesture on the transparent pressure-sensing touch panel. Each pressure metric corresponds to pressure (or force) applied to the transparent pressure-sensing touch panel by a respective impression of the input gesture. The method further comprises adjusting the displayed content on the touch screen in response to the input gesture, wherein the displayed content is adjusted based on to the one or more pressure metrics for the input gesture.03-03-2011

Haifeng Li, Sunnyvale, CA US

Patent application numberDescriptionPublished
20110022113Analyzer Compatible Communication Protocol - Methods and systems for programming a plurality of leads under at least two distinct modalities are provided. The leads may be grouped within satellites and multiple satellites may be configured within a single lead. Each lead includes a power and communications bus providing commands, and information and pulses to the satellites. The leads may be connected to at least two different command and pulse sources, optionally a cardiac pacemaker and/or a cardiac pulse analyzer system. A command may include or be preceded by a wake-up pulse that facilitates identification of a modality applicable to the associated command and data. A command may further optionally include a reference pulse or series of reference pulses, whereby the satellite references data pulses in relation to one or more aspects of the associated reference pulse. A data pulse may deliver two bits of information.01-27-2011
20110034964Integrated Circuit Implementation and Fault Control System, Device, and Method - Apparatus and methods enable robust, reliable control for implantable medical devices, including cardiac pacemakers, defibrillators and cardiac resynchronization devices. Integrated circuits in the devices have minimized interfaces, can derive power from the interface signals, and have high voltage and latch-up protection. A device lead has a power generation circuit and a switching circuit using cascaded PMOS transistors for operating with a stable voltage despite fluctuations in the supplied voltage. The lead has control electronics that provide a very low impedance between an electrode and a lead conductor during most of the duration of a pacing pulse, but during a brief initial portion of the pacing pulse, provide a very high impedance to permit charging up a power supply that is local to the control electronics. A method of stabilizing the external impedance and a system for fault detection and fault recovery for an implantable device are also provided.02-10-2011

Haifeng Li, Mountain View, CA US

Patent application numberDescriptionPublished
20090013791PRESSURE SENSOR CIRCUITS - Implantable pressure sensors and methods for making and using the same are provided. A feature of embodiments of the subject pressure sensors is that they are low-drift sensors. The subject sensors find use in a variety of applications.01-15-2009
20090062879SELF-REFERENCING COMMUNICATION IN IMPLANTABLE DEVICES - Various aspects of the present invention enable robust, reliable control functionality for effectors present on intraluminal, e.g., vascular leads, as well as other types of implantable devices. Aspects of the invention include implantable integrated circuits that have self-referencing and self-clocking signal encoding, and are capable of bidirectional communication. Also provided by the invention are effector assemblies that include the integrated circuits, as well as implantable medical devices, e.g., pulse generators that include the same, as well as systems and kits thereof and methods of using the same, e.g., in pacing applications, including cardiac resynchronization therapy (CRT) applications.03-05-2009
20090062880SELF-REFERENCING COMMUNICATION IN IMPLANTABLE DEVICES - Various aspects of the present invention enable robust, reliable control functionality for effectors present on intraluminal, e.g., vascular leads, as well as other types of implantable devices. Aspects of the invention include implantable integrated circuits that have self-referencing and self-clocking signal encoding, and are capable of bidirectional communication. Also provided by the invention are effector assemblies that include the integrated circuits, as well as implantable medical devices, e.g., pulse generators that include the same, as well as systems and kits thereof and methods of using the same, e.g., in pacing applications, including cardiac resynchronization therapy (CRT) applications.03-05-2009
20100204766IMPLANTABLE INTEGRATED CIRCUIT - Embodiments of the present invention enable robust, reliable control functionality for effectors present on intraluminal, e.g., vascular leads, as well as other types of implantable devices. Embodiments of the invention enable the required functionality for accurate long term control of effectors units, even ones present on multiplex carrier configurations, while provide for low power consumption. Aspects of the invention include implantable integrated circuits that have power extraction; energy storage; communication; and device configuration functional blocks, where these functional blocks are all present in a single integrated circuit on an intraluminal-sized support. Also provided by the invention are effector assemblies that include the integrated circuits, as well as implantable medical devices, e.g., pulse generators that include the same, as well as systems and kits thereof and methods of using the same, e.g., in pacing applications, including cardiac resynchronization therapy (CRT) applications.08-12-2010

Patent applications by Haifeng Li, Mountain View, CA US

Haifeng Li, Beijing CN

Patent application numberDescriptionPublished
20080278765Method for Processing Fm-Am Mixed Halftone Images on a Multi-Bit Depth Imaging Apparatus - Disclosed is a method for processing FM-AM mixed halftone images on a multi-bit depth imaging apparatus, which relates to a method for producing halftone dots in the field of image hard copying. In the prior art, since it is hard to avoid the impact of the error diffusion for the output apparatus to control the mixed dots with multi-bit imaging depth based on the error diffusion, the output of the mixed dots with multi-bit imaging depth cannot satisfy requirements of the apparatus. According to the method of the present invention, the dynamic algorithm for controlling the multi-bit mixed dots is used for screening based on the existing mixed screening process using dual-feedback error diffusion. Furthermore, multi-bit halftone images with high quality and rich gradations can be output by the multi-bit depth imaging apparatus. The method of the present invention can solve the phenomenon of sawtooth in the margins of the mixed dots output by the conventional single-bit apparatus and obtain the FM-AM mixed dots with the effect of high resolution and continuous gradations, which are output under low resolution.11-13-2008
20080285085Method for Controlling the Shapes of FM-AM Mixed Dots on a Multi-Bit Depth Imaging Apparatus - Disclosed is a method for controlling the shapes of FM-AM mixed halftone dots on the multi-bit depth imaging apparatus. In the prior art, since the reproduction of the shapes of the dots in various gradations is absolutely based on the theory of random error diffusion and is influenced by the dynamic controlling output mechanism for the multi-bit dots, it is hard to assure the controllability of the shapes of the dots in a certain gradation. Based on the prior art, the dynamic statistic algorithm with adjacent output gray levels is introduced to assure the controllability of the shapes of the dots and solve the problem of random change of the shapes of the dots due to the randomicity of the error diffusion. According to the disclosed method, the features of the multi-bit imaging apparatus can be achieved fully in light of the requirements of the dots on the basis of the original method for multi-bit FM-AM mixed screening using error diffusion based on dual-feedback. The effect of FM-AM mixed halftone screening can be achieved under low resolution with controllable shapes of the dots, The problem of granular sensation can be solved during the practical output of the mixed halftone dots so as to assure the smooth effect of the gradations.11-20-2008
20090296165Methods and Systems for Scanning and Processing an Image Using the Error Diffusion Screening Technology - Disclosed is a method for scanning and processing an image using the error diffusion screening technology, comprising: (1) scanning each pixel M12-03-2009
20110279872Image Processing Method and Apparatus - An image processing method includes: generating a stochastic screening dither matrix (S11-17-2011
20110289182AUTOMATIC ONLINE VIDEO DISCOVERY AND INDEXING - A classifier may be integrated into a pipeline of a general web crawler. The classifier may classify crawled webpages as either video pages or non-video pages. Video pages and information regarding domain importance may be aggregated. Ones of the domains of the video pages may be selected based on domain importance rankings. Webpages of the selected domains may be randomly sampled. The sampled webpages may be structurally analyzed and hint information may be generated with respect to each of the selected domains. The hint information may guide a deep crawling operation for discovering all video pages within the selected domains. Video links within the video pages may be found, one or more videos may be downloaded, and one or more representations of the one or more videos may be indexed.11-24-2011

Patent applications by Haifeng Li, Beijing CN

Haifeng Li, Morganville, NJ US

Patent application numberDescriptionPublished
20110135310Channel Power Management in a Branched Optical Communication System - Channel power management may be achieved in a branched optical communication system such that uniform loading is provided across branch channels on a branch drop path without passing information signals that are not intended for the branch terminal to the branch drop path. In general, a system and method consistent with the present disclosure reuses one or more loading signals (e.g., noise bands) from the branch add path to maintain uniform loading in the branch drop path of the same branch. The system and method thus prevents trunk channels from being dropped to a branch terminal when those trunk channels are not intended for the branch terminal.06-09-2011
20110200322Flexible Branching Unit and System Including the Same - Fault tolerance may be achieved in a branched optical communication system such that a fault in one optical path may not affect optical signals coupled from a healthy optical path. In general, a flexible branching unit is configured, when adding and dropping channels, to select channels from a healthy path and not from the faulty path (e.g., a trunk path or a branch path) to prevent non-uniform channel loading on the trunk path after the branching unit. In this manner, a fault detected on the trunk path may not affect signals from the branch path and a fault detected on the branch path may not affect signals from the trunk path, thereby providing fault tolerance. A flexible branching unit may also be capable of adjusting the number and selection of channels that are added and dropped at the branching unit.08-18-2011

Haifeng Li, Zhejiang CN

Patent application numberDescriptionPublished
20110199373Screen Device for Three-Dimensional Display with Full Viewing-Field - A screen device for three-dimensional display with full viewing-field comprises a display screen (08-18-2011

Haifeng Li, Zhejiang Province CN

Patent application numberDescriptionPublished
20120057131FULL PARALLAX THREE-DIMENSIONAL DISPLAY DEVICE - The present invention discloses a full parallax three-dimensional display device. It comprises a projector array and an orthogonal cylinder raster screen. The orthogonal cylinder raster screen comprises the first cylinder raster and the second cylinder raster. The projector array and the orthogonal cylinder raster screen are put in order. The projector array projects images on the orthogonal cylinder raster screen. The raster directions of the first cylinder raster and the second cylinder raster of the orthogonal cylinder raster screen are parallel to the x-axis and the y-axis, respectively. The advantage of the present invention is that it can generate 3D images of high image resolution and high view-field resolution. The extremely tiny view field intervals can bring completely continuous and jumping-free 3D perception for the viewer, reduce the fatigue caused by discontinuous view field in conventional 3D display, and achieve full parallax 3D display including horizontal parallax and vertical parallax.03-08-2012