Patents by Inventor Bun Lee

Bun Lee 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).

  • Publication number: 20090077246
    Abstract: A pull-based parallel video server system and method of implementation useful in an on-demand video system includes a plurality of slave admission schedulers operating in parallel with a master admission scheduler to back up the master admission scheduler that controls access to an array of pull-based video servers according to a protocol that accounts for jitter and loss of packets, as well as network delays. A transport protocol is provided that improves video data throughput under such conditions. To determine the architecture and functional requirements of the redundant admission schedulers, an analytical tool in the form of a performance model has been developed that incorporates network delays, delay jitters and packet losses on the communication links between the clients, schedulers and servers.
    Type: Application
    Filed: September 19, 2007
    Publication date: March 19, 2009
    Applicant: The Chinese University of Hong Kong
    Inventor: Yiu Bun Lee
  • Publication number: 20090006643
    Abstract: Digital content is encoded and transmitted in form suitable for presentation in a variety of formats, particularly suited to mobile device environments. In specific embodiments, server-side, independent and integrated architectures are disclosed. In further specific embodiments, techniques for prefix, postfix, interrupted and midway insertions of generic data and multi-media data are disclosed together with techniques for seamlessly handling media duration, whether or not media duration is known. Still further, techniques are disclosed for retaining synchronization among inserted media segments, for reducing startup delay and for traffic smoothing, all as part of systems and techniques for media transcoding.
    Type: Application
    Filed: May 22, 2008
    Publication date: January 1, 2009
    Applicant: The Chinese University of Hong Kong
    Inventor: Yiu-bun Lee
  • Publication number: 20080147344
    Abstract: The present invention relates to a method of automated process control operation wherein a physical object is directed into a read zone, information stored on an ID Container attached to the physical object is retrieved, physimetric property of the physical object is captured, the retrieved information is processed to provide recorded physimetric property specific to the physical object, the recorded physimetric property and captured physimetric property are passed to an analysis algorithm for comparison, and the results of the comparison are delivered to a controlling device. The results of the comparison will determine whether the physical property will continue to pass through the read zone or require to be rotated by the operator.
    Type: Application
    Filed: December 14, 2006
    Publication date: June 19, 2008
    Applicant: The Hong Kong Polytechnic University
    Inventors: Siu Keung Kwok, Chi Fai Cheung, Hing Choi Tsang, Wing Bun Lee, Burly K. Tan, Pui Him Ng
  • Publication number: 20080143476
    Abstract: The present invention relates a scanable product made of a physical object and an ID Container, such ID Container possessing on its memory a Unique ID and a stored coded locking mechanism. The stored coded locking mechanism is generated by inputting physimetric property of the physical object and its Unique ID into hash functions to create an unintelligible code. Methods of making such a scanable product, and methods of authenticating a scanable product are also taught.
    Type: Application
    Filed: December 14, 2006
    Publication date: June 19, 2008
    Applicant: The Hong Kong Polytechnic University
    Inventors: Siu Keung Kwok, Chi Fai Cheung, Hing Choi Tsang, Wing Bun Lee, Burly K. Tan, Pui Him Ng
  • Publication number: 20070250188
    Abstract: A computer-aided configuration for a technical installation includes a presentation layer with operator control interfaces, an application layer containing all applications, a realtime basic processing layer for providing all applications and operator control interfaces with information and a data manager for creating and maintaining data models for operating and system functions. One such configuration is constructed in such a way that the structure thereof is favorable to extension and offers high availability. The applications in the realtime basic processing layer are respectively combined to form bundles, wherein the same data model is respectively common to the applications of a bundle. The data of a respective application bundle is stored in an application bundle storage unit as shared memory mapped files. A method for operating such a configuration includes storing the data in the realtime basic processing layer in an application bundle storage unit as shared memory mapped files.
    Type: Application
    Filed: April 21, 2005
    Publication date: October 25, 2007
    Inventors: Claus Kuhner, Martin Schneider, Lothar Schwab, Bun-Lee Wee
  • Publication number: 20070195084
    Abstract: Ultra-precision freeform surfaces are important to the development of complex and micro-optical-electro-mechanical devices used in many photonics and telecommunication products such as F-theta lenses for laser printers. These surfaces are complex and large scale surface topologies with shapes that generally possesses no rotational symmetry. Due to the geometrical complexities of these ultra-precision freeform surfaces, it is difficult to characterize the form accuracy and surface quality of freeform optical surfaces.
    Type: Application
    Filed: August 29, 2006
    Publication date: August 23, 2007
    Inventors: Chi-Fai Cheung, Huifen Li, Wing-Bun Lee, Suet To, Lingbao Kong
  • Patent number: 7224702
    Abstract: An embodiment of the invention includes an efficient error-control system and method for recovering packet losses, especially losses in distributing multicast video over broadband residential networks. Preferably, unlike most existing error-control algorithms designed for Internet multicast, the system and method does not employ substantial feedback suppression. Preferably, the system and method does not employ substantial multicasted retransmission. Preferably, the system and method does not employ substantial parity retransmission. Preferably, the system and method does not employ substantial local loss recovery. The system and method integrates two existing classes of error-control algorithms: Automatic Repeat Request (ARQ) and Forward Error Correction (FEC), to reduce traffic overhead and achieve scalability.
    Type: Grant
    Filed: August 30, 2001
    Date of Patent: May 29, 2007
    Assignee: The Chinese University of Hong Kong
    Inventor: Jack Yiu-bun Lee
  • Publication number: 20070010637
    Abstract: Provided are a novel transition metal complex where a monocyclopentadienyl ligand to which an amido or alcoxy group is introduced is coordinated, a method of synthesizing the same, and olefin polymerization using the transition metal complex. Compared to a conventional transition metal complex having a silicon bridge and an oxido ligand, the transition metal complex has a phenylene bridge, so that a monomer easily approaches the transition metal complex in terms of structure and a pentagon ring structure of the transition metal complex is stably maintained. The catalyst composition including the transition metal complex is used to synthesize a polyolefin copolymer having a very low density less than 0.910 g/cc.
    Type: Application
    Filed: July 10, 2006
    Publication date: January 11, 2007
    Inventors: Choong Lee, Eun Lee, Seungwhan Jung, Jong Ha, Beomdoo Seo, Bun Lee, Ui Joung, Dae Joe
  • Publication number: 20070010638
    Abstract: Provided are a novel transition metal complex where a monocyclopentadienyl ligand to which an amine-based group is introduced is coordinated, a method of synthesizing the same, and olefin polymerization using the transition metal complex In the novel transition metal complex, an imino phenyl group is not cross-linked to a metal atom and directly introduced to a cyclopentadiene (Cp) ring. The catalyst composition including the transition metal compound is used to obtain a polyolefin copolymer having a very low density less than 0.910 g/cc.
    Type: Application
    Filed: July 10, 2006
    Publication date: January 11, 2007
    Inventors: Choong Lee, Eun Jung Lee, Seungwhan Jung, Jong Ha, Beomdoo Seo, Bun Lee, Ui Joung, Dae Joe
  • Patent number: 7107606
    Abstract: An embodiment of a system and method for providing video on demand provides pre-scheduled multicasts of videos as well as dynamically initiated transmissions of the front portion of videos. Users may first receive a dynamically initiated front portion of a video and then be merged into a pre-scheduled multicast. Preferably, the dynamically initiated transmission is also a multicast. Preferably, multiple admission controllers and a single server coordinate the dynamically initiated transmissions for any one video. Preferably, interactive controls are supported without requiring extra server-side resources. Preferably, latency is automatically equalized between users admitted via the pre-scheduled and the dynamically initiated transmissions. Preferably, a user receiving a video via a pre-scheduled multicast does not need to change channels to finish receiving the video transmitted.
    Type: Grant
    Filed: August 30, 2001
    Date of Patent: September 12, 2006
    Assignee: The Chinese University of Hong Kong
    Inventor: Jack Yiu-bun Lee
  • Publication number: 20060135743
    Abstract: Provided are a bimetallic zinc complex and a method of producing polycarbonate, including polymerizing an epoxy compound and carbon dioxide using the bimetallic zinc complex. The bimetallic zinc complex according to the present invention has a distance between zinc-zinc atoms, which is maintained in a limited range regardless of its concentration in a reaction medium for the polymerization. Thus, the bimetallic zinc complex can have a polymerization activity even at a high ratio of monomer/catalyst, thereby reducing a catalyst amount to be used, which is economically advantageous. Further, the bimetallic zinc complex can produce a high molecular weight polycarbonate.
    Type: Application
    Filed: March 25, 2005
    Publication date: June 22, 2006
    Inventors: Young Park, Hyo Lee, Young Won, Bun Lee, Heon Kwon, Soo Lee
  • Publication number: 20060069221
    Abstract: Provided are a bridged metallocene compound particularly suitable for copolymerization of ethylene and alpha-olefin or cyclic olefin, a process of preparing the metallocene compound, and a process of preparing polyolefin using the metallocene compound. The bridged metallocene compound has low steric hindrance and good (co)polymerization activity, and thus, exhibits good activity in copolymerization of ethylene and alpha-olefin such as 1-hexene or 1-octene. Furthermore, the process of preparing the bridged metallocene compound is simplified, and thus, suitable for mass production.
    Type: Application
    Filed: September 23, 2005
    Publication date: March 30, 2006
    Inventors: Choong Lee, Jong Ha, Seung Jung, Eunjung Lee, Beomdoo Seo, Young Park, Hyosun Lee, Sung Hong, Young Won, Bun Lee
  • Publication number: 20050080296
    Abstract: There are provided a method of simply preparing a 1,4,6-substituted, 1,4-substituted, 1,6-substituted, or 1-substituted fulvene compound, the intermediates of the fulvene compound, and a method of preparing an ansa-metallocene compound in which two cyclopentadienyl ligands are bridged by one carbon and there are substituents only at positions adjacent to the bridging point of a cyclopentadienyl ligand, using the fulvene compound.
    Type: Application
    Filed: October 13, 2004
    Publication date: April 14, 2005
    Inventors: Young Park, Hyosun Lee, Sung Hong, Kwang Song, Boong Jeong, Dae Nam, Hye Jung, Bun Lee, Young Won
  • Patent number: 6726008
    Abstract: A diskette storage box for audio-visual or computer media disks includes a front cover and a rear cover having a disk retaining mechanism that includes plural first surfaces that extend upward from the rear cover and inward towards a center position aligned with a center of the disk. The disk retaining mechanism includes a set of riser tabs that extend up from the first surfaces and each riser tab includes a respective retaining tab that retains the disk. The disk retaining mechanism also includes a riser tabs limiting device that is coupled to the riser tabs and that limits movement of riser tabs while being depressed for releasing a retained disk.
    Type: Grant
    Filed: December 11, 2002
    Date of Patent: April 27, 2004
    Assignee: Gain Development Industrial Limited
    Inventor: Kong Bun Lee
  • Patent number: 6625361
    Abstract: A method for forming two conductive films isolated electrically from each other on the surface of a fiber is provided. According to the method, a fiber is attached into the grooves on a silicon substrate using photoresist as glue. A photoresist pattern for a conductive film on the surface of the fiber is formed by a photolithography process. After wet-etching some amount of the fiber on the patterned area, which is needed for lifting off a metal film deposited on the unnecessary area, a metal film is deposited over whole area of the wafer. Removing photo-resist by a heated stripper solution leaves a metal film only on the patterned area of the fiber and detaches the fibers from the grooves of the wafer The second metal film on the other side of the fiber can be formed by the same procedures as the first metal film except that the deposited surface of the fiber must be attached to the grooves upside down.
    Type: Grant
    Filed: February 27, 2002
    Date of Patent: September 23, 2003
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Sahng-gi Park, Jong-bae Kim, Doo-hee Cho, Yong-gyu Choi, Kyong-hon Kim, Bun Lee
  • Publication number: 20030108314
    Abstract: A method for forming two conductive films isolated electrically from each other on the surface of a fiber is provided. According to the method, a fiber is attached into the grooves on a silicon substrate using photoresist as glue. A photoresist pattern for a conductive film on the surface of the fiber is formed by a photolithography process. After wet-etching some amount of the fiber on the patterned area, which is needed for lifting off a metal film deposited on the unnecessary area, a metal film is deposited over whole area of the wafer. Removing photo-resist by a heated stripper solution leaves a metal film only on the patterned area of the fiber and detaches the fibers from the grooves of the wafer The second metal film on the other side of the fiber can be formed by the same procedures as the first metal film except that the deposited surface of the fiber must be attached to the grooves upside down.
    Type: Application
    Filed: February 27, 2002
    Publication date: June 12, 2003
    Inventors: Sahng-gi Park, Jong-bae Kim, Doo-hee Cho, Yong-gyu Choi, Kyong-hon Kim, Bun Lee
  • Publication number: 20030037331
    Abstract: An embodiment of a system and method for providing video on demand provides pre-scheduled multicasts of videos as well as dynamically initiated transmissions of the front portion of videos. Users may first receive a dynamically initiated front portion of a video and then be merged into a pre-scheduled multicast. Preferably, the dynamically initiated transmission is also a multicast. Preferably, multiple admission controllers and a single server coordinate the dynamically initiated transmissions for any one video. Preferably, interactive controls are supported without requiring extra server-side resources. Preferably, latency is automatically equalized between users admitted via the pre-scheduled and the dynamically initiated transmissions. Preferably, a user receiving a video via a pre-scheduled multicast does not need to change channels to finish receiving the video transmitted.
    Type: Application
    Filed: August 30, 2001
    Publication date: February 20, 2003
    Applicant: The Chinese University of Hong Kong
    Inventor: Jack Yiu-bun Lee
  • Publication number: 20020114283
    Abstract: An embodiment of the invention includes an efficient error-control system and method for recovering packet losses, especially losses in distributing multicast video over broadband residential networks. Preferably, unlike most existing error-control algorithms designed for Internet multicast, the system and method does not employ substantial feedback suppression. Preferably, the system and method does not employ substantial multicasted retransmission. Preferably, the system and method does not employ substantial parity retransmission. Preferably, the system and method does not employ substantial local loss recovery. The system and method integrates two existing classes of error-control algorithms: Automatic Repeat Request (ARQ) and Forward Error Correction (FEC), to reduce traffic overhead and achieve scalability.
    Type: Application
    Filed: August 30, 2001
    Publication date: August 22, 2002
    Applicant: The Chinese University of Hong Kong
    Inventor: Jack Yiu-Bun Lee
  • Patent number: 6410347
    Abstract: The method of manufacturing VCSEL composed of multiple material layers uses a main measuring laser having same wavelength of that of VCSEL so as to estimate the growth periods required for growing a predetermined thickness of the material layers by analyzing the reflected signal of the main measuring laser and then control the growth time durations of subsequent material layers. This method eliminates the need of pre-knowledge of refractive indexes and the growing speeds of the material layers. Also, an interruptive process for measuring thickness, growth speed or refractive indexes can be omitted so as to perform the entire epitaxial growth in-situ and thus improve the reproducibility and the uniformity. In addition, a subsidiary measuring laser may be used other than the main measuring laser for improving the accuracy of the control of growth time duration, where the subsidiary measuring laser has a different wavelength from that of VCSEL.
    Type: Grant
    Filed: September 13, 1999
    Date of Patent: June 25, 2002
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jong Hyeob Baek, Bun Lee
  • Patent number: 6193900
    Abstract: A method for sensing the etch of distributed Bragg reflector (called DBR below) in a real time is provided. More particularly, a method for searching informations of etch speed and etch stop step by monitoring the etching procedure in the wet etching method which is a post-process in the semiconductor device manufacturing process. A laser beam is irradiated on the sample sunk in the etching solution during the etching process is on the way. Then, computer measures the intensity of laser beam reflected on the sample, analyzes the periodic signals occurred by its interference and obtains the etching speed of the sample in a real time. The laser provides thermal energy on the sample during wet etching and occurs irregular etching speed on a beam contacting part of sample and non contacting part. Uniform etching speed can be obtained in the entire sample using a convex lens having a suitable focal distance.
    Type: Grant
    Filed: August 28, 1998
    Date of Patent: February 27, 2001
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jong Hyeob Baek, Bun Lee