Patents Assigned to Applied Science & Technology
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Publication number: 20080151550Abstract: A light-emitting assembly for conditioning the light output of at least one light-emitting source for light guide coupling, comprising a lens and at least one light-emitting source, the light-emitting source having an optical output axis and the lens comprising a beam diverging portion for diverging or spreading light about the output axis, wherein the beam diverging portion of the lens is along the optical output axis and forward of the light-emitting source, and at least one beam converging portion for converging or compressing light away from the optical axis is adjacent the beam diverging portion.Type: ApplicationFiled: December 22, 2006Publication date: June 26, 2008Applicant: Hong Kong Applied Science and Technology Research Institute Co. Ltd.Inventors: Ying Liu, Danding Huang, Shou Lung Chen, Chen-Jung Tsai
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Publication number: 20080143602Abstract: A system for providing multiple antenna patterns comprises a first antenna element, a second antenna element, wherein the first and second antenna elements are coplanar and arranged orthogonally with respect to each other in the plane, and a feed circuit in communication with a signal feed line alternately connecting the signal feed line to each of the first and second antenna elements.Type: ApplicationFiled: December 18, 2006Publication date: June 19, 2008Applicant: Hong Kong Applied Science and Technology Research Institute Co., Ltd.Inventors: Chi Lun Mak, Corbett R. Rowell
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Publication number: 20080144315Abstract: Apparatuses for backlighting and manufacturing processes thereof are disclosed. There is provided a backlight module. The backlight module comprises a double-sided circuit board with thermal conducting material as one of the core layers; a plurality of light source components mounted on the first surface of the circuit board; and, a plurality of electronic components mounted on the second surface of the circuit board. The thermal conducting core layer discharges heat generated by the light source components. The circuit board has at least one window on the surface layer at the second surface to expose the thermal conducting core layer for thermal dissipation. As such, the component heights on the illuminating side of the circuit board are unified, and the reflector can be made as a smooth planar sheet to provide a more uniform backlight illumination compared to a single-side circuit board design. Further, such an arrangement reduces the complexity in manufacturing the reflector and hence the cost thereof.Type: ApplicationFiled: December 18, 2006Publication date: June 19, 2008Applicant: Hong Kong Applied Science and Technology Research Institute Company LimitedInventors: Shou Lung Chen, Kwan Wah Ng, Ying Liu
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Publication number: 20080137635Abstract: A method for controlling a Multiple Input Multiple Output (MIMO) antenna system comprises at a first communication unit, receiving a table from a second communication unit, the table including a plurality of space time processing schemes based on predicted channel state information, selecting at least one of the schemes from the table, and transmitting data from the first communication unit to the second communication unit according to the at least one selected space time processing scheme.Type: ApplicationFiled: December 12, 2006Publication date: June 12, 2008Applicant: Hong Kong Applied Science and Technology Research Institute Co., Ltd.Inventors: Zhen Gang Pan, Xue Yuan Zhao
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Publication number: 20080139153Abstract: Systems and methods for antenna configuration selection using weighted outdated channel state information are shown. Outdated channel state information may be used in combination with statistical channel information for estimating channel state information according to embodiments of the invention. For example, by combining channel state information, weighted by its temporal relevance, with statistical information, recent channel performance may be used along with historical performance information for antenna configuration selection. Antenna selection of embodiments may be provided for multiple input multiple output (MIMO) systems, such as wireless systems employing multiple radio frequency chains and multiple antennas.Type: ApplicationFiled: December 12, 2006Publication date: June 12, 2008Applicant: Hong Kong Applied Science and Technology Research Institute Co., Ltd.Inventors: Luo Tuo, Tsang Yui Ming, Roger Shu Kwan Cheng, Vincent Kin Nang Lau
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Publication number: 20080137071Abstract: An optical displacement sensor for measuring distance or surface displacement of an object by surface profile scanning includes an optical source, a first optical detector and a second optical detector. The optical source is located intermediate the first and second optical detectors. The first and second optical detectors are arranged to collect light emitted by the optical source when scattered by and/or reflected from the object.Type: ApplicationFiled: December 12, 2006Publication date: June 12, 2008Applicant: Hong Kong Applied Science and Technology Research Institute Co. Ltd.Inventor: Yeung Ming Chow
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Publication number: 20080129198Abstract: An LED device includes a multi-layer stack of materials having a p-layer, an n-layer, and a p-n junction for emission of light. The LED device further includes a p-electrode and an n-electrode for electrical connection between the respective p-layer and n-layer with an AC power source, and a capacitor located between one of the p-layer and n-layer and its respective electrode.Type: ApplicationFiled: December 1, 2006Publication date: June 5, 2008Applicant: Hong Kong Applied Science and Technology Research Institute Co. Ltd.Inventors: Jian Feng, Hung-Shen Chu
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Publication number: 20080130314Abstract: A light guiding strip and a backlight module and display using the same are provided. The light guiding strip of the present invention includes a plurality of light reflecting surfaces and a plurality of light emergent surfaces. Each of the light reflecting surfaces has a light diffusion pattern. The light guiding strip of the present invention has the advantages of light weight, wide LED pitch, low cost, thickness and so on.Type: ApplicationFiled: September 14, 2007Publication date: June 5, 2008Applicant: Hong Kong Applied Science and Technology Research Institute Co. Ltd.Inventors: Ying Liu, Danding Huang, Chen-Jung Tsai
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Publication number: 20080122832Abstract: Methods and apparatuses for image display are disclosed. There is provided an image display apparatus. The apparatus includes a plurality of display modules including display elements manufactured from different bins; a plurality of driving circuits providing different driving conditions for the display modules, at least one driving circuit for each display module; and a control circuit controlling the driving circuits to compensate each display module for variation of characteristics amongst modules of bins. The driving control circuit may include a look up table storing information about one or more characteristics of each display module.Type: ApplicationFiled: November 29, 2006Publication date: May 29, 2008Applicant: Hong Kong Applied Science and Technology Research Institute Company LimitedInventors: Shou Lung Chen, Chen-Jung Tsai
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Patent number: 7366519Abstract: Disclosed are systems and methods which provide for management of wireless communications through the development and use of link space information. Such link space information provides link-centric information with respect to wireless links of a network to thereby provide a view of the network which takes into account phenomena affecting the wireless links. Utilizing such link space information, automated management of various aspects of a wireless network may be provided, including automated provisioning, management, and/or optimization of network links. Network operations may include use of link space information in providing network management applications such as automatic fault management, automatic performance management, operation advisories, and/or the like.Type: GrantFiled: October 21, 2002Date of Patent: April 29, 2008Assignee: Hong Kong Applied Science and Technology Research Institute Co., Ltd.Inventors: Leung Hang Ching Jason, Piu Bill Wong
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Publication number: 20080094287Abstract: A transmitting and receiving system including an antenna element having first and second current paths, and a meander feed line connected to said first and second current paths, the meander feed line including a radiating portion parallel to the first current path, wherein a current in the radiating portion is in a direction opposite of a current in the first current path, and wherein a current in the second current path is in a direction the same as the current in said radiating portion.Type: ApplicationFiled: October 22, 2007Publication date: April 24, 2008Applicant: Hong Kong Applied Science and Technology Research Institute Co., Ltd.Inventor: Corbett Rowell
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Publication number: 20080094302Abstract: A system for reducing unwanted signals comprises a ground plane, a first active component disposed so as to cause signals in the ground plane, a second active component disposed so as to cause signals in the ground plane, wherein the ground plane provides a path for the signals from the first active component to affect the second active component and for the signals from the second active component to affect the first active component, and a filter element configured as a pattern in the ground plane receiving and attenuating the signals from each of the first and second active components.Type: ApplicationFiled: October 20, 2006Publication date: April 24, 2008Applicant: Hong Kong Applied Science and Technology Research Institute Co., Ltd.Inventors: Ross D. Murch, Chi-Yuk Chiu, Corbett Rowell
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Patent number: 7359718Abstract: The present invention is directed to systems and methods which monitor a network environment, collect client information available online, and refine location determinations of individual clients based on observed information as well as online information. More particularly, the present invention is directed to systems and methods which monitor the wireless network, collect online receive signal strength indicator (RSSI) information observations from client users, without requiring knowledge of those clients' locations. The present invention is additionally directed to systems and methods to enhance the accuracy of the location determinations in a network, based on observed client information such as, for example, signal strength references.Type: GrantFiled: April 30, 2004Date of Patent: April 15, 2008Assignee: Hong Kong Applied Science and Technology Research Institute Co., Ltd.Inventors: Meixia Tao, Kin-Nang Lau
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Publication number: 20080083868Abstract: A monitoring device for security surveillance application, the device comprising: an electromagnetic wave sensor for sensing electromagnetic wave from an external electromagnetic wave source; a detection window for forming a partition between the external electromagnetic wave source and the electromagnetic wave sensor; and an anti-tampering arrangement comprising an optical arrangement for deploying an optical surveillance beam and control circuitry, wherein i. the optical surveillance beam comprising a first beam portion and a second beam portion, the first beam portion being a beam emitted by the optical arrangement towards the detection window and the second beam portion being due to total internal reflection of the first beam portion by the detection window, and ii. the control circuitry being for detection of a variation of the second beam portion, wherein the variation is indicative of tampering of the detection window.Type: ApplicationFiled: June 16, 2006Publication date: April 10, 2008Applicant: Hong Kong Applied Science and Technology Research Institute Co. Ltd.Inventors: Torsten Wipiejewski, Yeung Ming Chow
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Publication number: 20080082797Abstract: Methods and apparatuses for processing a Configurable Single-Instruction-Multiple-Data (CSIMD) instruction are disclosed. In the method, a lookup table (LUT) storing information is provided to support random access of memory locations associated with a plurality of processing elements (PEs) and to perform instruction variances by the PEs. A CSIMD instruction is received, comprising a command and an index to the lookup table (LUT), to be executed by the PEs. The command of the received CSIMD instruction is executed in parallel differently by the PEs using the LUT index to randomly access the memory locations.Type: ApplicationFiled: October 3, 2006Publication date: April 3, 2008Applicant: Hong Kong Applied Science and Technology Research Institute Company LimitedInventors: Wing Yee LO, Simon Moy
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Publication number: 20080079635Abstract: An antenna system comprising a ground plane structure on a substrate, an antenna space on the substrate adjacent to the ground plane structure, the antenna space including an ungrounded antenna therein with an associated first resonant length, an extension of the ground plane projecting into the antenna space, the ground plane extension defining a second resonant length that includes at least part of its own length and at least part of a length of the ground plane structure.Type: ApplicationFiled: September 28, 2006Publication date: April 3, 2008Applicant: Hong Kong Applied Science and Technology Research Institute Co., Ltd.Inventor: Corbett Rowell
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Publication number: 20080069026Abstract: A repeater for connecting a host and a device in a WUSB environment, the repeater comprising: host interfacing means for establishing a secure wireless data communication channel for data communication with a host, device interfacing means for establishing a secure wireless data communication channel for data communication with a device, data buffer for storing data for subsequent onward transmission to either said host or said device, and scheduler for scheduling timing of onward transmission of data from said data buffer to either said host or said device.Type: ApplicationFiled: September 14, 2006Publication date: March 20, 2008Applicant: Hong Kong Applied Science and Technology Research Institute Co., Ltd.Inventors: Man Chi Chan, Chi Fai Jack Tang, Quan Long Din
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Publication number: 20080069065Abstract: A method of roaming between access points on the same or different wireless networks using a single wireless network interface adaptor. A device will establish a connection with a second wireless network access point while still connected with a first wireless network access point such that the device can concurrently communicate with both wireless access points. During and after connection with the second wireless network access point real-time IP data transfer is maintained with another network device by switching between the first and second access points for concurrently sending and receiving data packets via both access points using a switching strategy based at least in part on a number of the data packets to be send to each network access point. The method also determines when to roam, scans for candidate wireless network access points to connect to and selects the best access point for roaming based on selection criteria.Type: ApplicationFiled: September 20, 2006Publication date: March 20, 2008Applicant: Hong Kong Applied Science and Technology Research Institute Company LimitedInventors: Wai Keung Wu, Tun Han Felix Lo
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Publication number: 20080061310Abstract: A light emitting diode device includes a multi-layer stack of materials including a p-layer, a n-layer, and a light generating region for emission of light in a primary emission direction towards one of the p- and n-layers; a substantially transparent layer located at or adjacent said one of the p- and n-layers, having a first surface facing said one of the p- and n-layers and an opposed second surface; and a reflective surface formed at or adjacent the second surface of the transparent layer for directing at least a portion of the emitted light in a direction away from the primary emission direction so as to enhance light emission from a side of the light emitting diode device.Type: ApplicationFiled: September 7, 2006Publication date: March 13, 2008Applicant: Hong Kong Applied Science and Technology Research Institute Company LimitedInventors: Kuo An Chiu, Jian Feng, Huaijun Peng, Hung-Shen Chu, Shengmei Zheng
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Publication number: 20080061304Abstract: A semiconductor light emitting device for emission of light having a predetermined bandwidth in a primary direction of emission includes a light generating region for the generation of light; and a 1-dimensional photonic crystal structure having a photonic bandgap covering at least a segment of said bandwidth. The 1-dimensional photonic crystal structure is located such that upon incident of light from the light generating region, light having a wavelength within the bandgap of the 1-dimensional photonic crystal structure is reflected in the primary direction of emission.Type: ApplicationFiled: September 7, 2006Publication date: March 13, 2008Applicant: Hong Kong Applied Science and Technology Research Institute Company LimitedInventors: Yan Huang, Kuo-An Chiu, Hua-Jun Peng, Jian Feng, Hung-Shen Chu