Patents by Inventor Wai YU

Wai YU 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: 20090251391
    Abstract: A power recycling method and apparatus for driving capacitive display elements are described. The driving process involves charging and discharging the display elements. More particularly, the method effectively reuses some of the energy during the discharging process. Energy in display elements flows back from the panel to a power supply and other optionally to devices like RAM, MCU directly during the discharging process. Diodes between one or more power supplies and the display elements ensure that the discharge paths are disconnected when the voltage of display elements drops below the voltage of the power supply. A resistor path from the display elements to ground or a power supply lower than the display threshold voltage of the display elements guarantees that elements are turned OFF after the discharge process.
    Type: Application
    Filed: April 2, 2008
    Publication date: October 8, 2009
    Applicant: Solomon Systech Limited
    Inventors: Ricky Chung Yee Ng, Felix Wai Yu Wong, Kenneth Chi Wai Lee, Stephen Wai-Yan Lai, Johnkid Lo
  • Patent number: 7572548
    Abstract: A non-aqueous electrolyte battery and a method of manufacturing the battery are provided. The non-aqueous electrolyte battery has a positive electrode including a positive electrode active material-layer stack containing a plurality of different positive electrode active materials and formed on a positive electrode current collector surface, a negative electrode including a negative electrode active material layer, and a separator interposed between the electrodes. The positive electrode active material-layer stack includes two or more layers respectively containing different positive electrode active material components, and of the two or more layers, the layer nearer the positive electrode current collector is formed by coating the collector with a positive electrode active material having the highest resistance increase rate and a conductive agent contained in that positive electrode active material by cold spraying.
    Type: Grant
    Filed: June 30, 2006
    Date of Patent: August 11, 2009
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Naoki Imachi, Denis Yau Wai Yu, Shin Fujitani
  • Publication number: 20090027876
    Abstract: A portable lighting device comprising a body with a battery storage, a lamp cap fixed on the body, a circuit board deposited inside the lamp cap, a first LED lamp and a relevant reflection base fixed on the circuit board, an optical diffuser rotatablely connected on the lamp cap as a dispersion lens of the first LED lamp, and a switch fixed on the body to control the on/off of the lighting device. The device has a simple structure and a small size so as to be portable and easily carried; the optical diffuser is rotatable, swiveling to the front of the first LED lamp for close quarters lighting and to the front of the second LED lamp for long-distance lighting. The device includes a clip on the body to attach the device on another object.
    Type: Application
    Filed: July 25, 2007
    Publication date: January 29, 2009
    Applicant: QUANTUM LIGHTING PRODUCTS LIMITED
    Inventor: Raymond King Wai Yu
  • Publication number: 20080299463
    Abstract: A nonaqueous electrolyte secondary battery that even at high-rate discharge wherein discharge is carried out at relatively large current, can attain an increase of discharge capacity. There is provided a nonaqueous electrolyte secondary battery comprising positive electrode (2), the positive electrode (2) including a collector and, superimposed thereon, a mixture layer containing a positive electrode active material in which lithium iron phosphate (LiFePO4) is contained, a conductive agent and a binder, the mixture layer exhibiting a mixture packing density after electrode formation of ?1.7 g/cm3, and further comprising nonaqueous electrolyte (5) containing a solvent in which ethylene carbonate and a linear ether such as 1,2-dimethoxyethane are contained.
    Type: Application
    Filed: January 10, 2006
    Publication date: December 4, 2008
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Kazunori Donoue, Takao Inoue, Denis Yau Wai Yu, Masahisa Fujimoto
  • Publication number: 20080286655
    Abstract: A non-aqueous battery with improved volume energy density and enhanced load characteristics is made available even when using olivine-type lithium phosphate as a positive electrode active material. The non-aqueous electrolyte battery of the present invention is provided with a positive electrode (1) containing lithium iron phosphate as a positive electrode active material, a negative electrode (2), and a non-aqueous electrolyte (4). In the positive electrode (1), a positive electrode active material-containing layer that is made of the positive electrode active material, a conductive agent, and a binder agent is formed on a positive electrode current collector. The positive electrode current collector has a thickness of less than 20 ?m and its surface that is in contact with the positive electrode active material-containing layer has a mean surface roughness Ra of greater than 0.026.
    Type: Application
    Filed: February 14, 2005
    Publication date: November 20, 2008
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Takao Inoue, Kazunori Donoue, Denis Yau Wai Yu, Masahisa Fujimoto, Shin Fujitani
  • Patent number: 7442808
    Abstract: Tricyclic compounds containing a cyclopropyl carboxylic acid or carboxylic acid derivative (e.g. amide) fused to a bicyclic ring, including pharmaceutically acceptable salts and prodrugs thereof, are agonists of G-protein coupled receptor 40 (GPR40) and are useful as therapeutic compounds, particularly in the treatment of Type 2 diabetes mellitus, and of conditions that are often associated with this disease, including obesity and lipid disorders, such as mixed or diabetic dyslipidemia, hyperlipidemia, hypercholesterolemia, and hypertriglyceridemia.
    Type: Grant
    Filed: May 11, 2007
    Date of Patent: October 28, 2008
    Assignee: Merck & Co., Inc.
    Inventors: Min Ge, Jiafang He, Fiona Wai Yu Lau, Gui-Bai Liang, Songnian Lin, Weiguo Liu, Shawn P. Walsh, Lihu Yang
  • Publication number: 20080261115
    Abstract: A non-aqueous electrolyte secondary battery includes a positive electrode having a positive electrode mixture, a negative electrode, and a non-aqueous electrolyte. The positive electrode mixture contains as a positive electrode active material Li1+x(MnyNizCo1?y?z)1?xO2, where 0<x<0.4, 0<y?1, and 0?z?1. The positive electrode mixture has a filling density of from 2.2 g/cm3 to 3.6 g/cm3, and a film thickness of less than 50 ?m.
    Type: Application
    Filed: March 7, 2008
    Publication date: October 23, 2008
    Inventors: Motoharu Saito, Katsutoshi Takeda, Hideyuki Koga, Hiroshi Sawada, Masahisa Fujimoto, Denis Yau Wai Yu
  • Publication number: 20080222881
    Abstract: A method of producing an active material for a lithium secondary battery, by which impurities causing problems in synthesizing an active material for a lithium secondary battery, including a lithium transition metal oxyanion compound are removed efficiently and enhancement of an energy density is realized, is provided. By cleaning the active material for a lithium secondary battery, including a lithium transition metal oxyanion compound, with a pH buffer solution, for example, it is possible to efficiently remove just only impurities such as Li3PO4 or Li2CO3, or a substance, other than LiFePO4, in which the valence of Fe is bivalent such as FeSO4, FeO or Fe3(PO4)2 without dissolving Fe of LiFePO4.
    Type: Application
    Filed: February 27, 2008
    Publication date: September 18, 2008
    Inventors: Denis Yau Wai Yu, Kazunori Donoue, Toshikazu Yoshida, Tetsuo Kadohata, Tetsuyuki Murata, Shigeki Matsuta
  • Patent number: 7400098
    Abstract: According to the present invention, a display driver includes a voltage and current source that drive pixels and compensate for parasitic voltage to produce row pixels having intensities that are relatively uncorrelated to the number of “ON” pixels in a given row. The voltage source that provides the pre-charge for each pixel includes a constant value and a compensation voltage determined based on the number of “ON” pixels in each row. The compensation voltage is also determined based on the characteristics of the diodes associated with each pixel and the resistance associated the common ground of each row.
    Type: Grant
    Filed: December 30, 2003
    Date of Patent: July 15, 2008
    Assignee: Solomon Systech Limited
    Inventors: Chung Yee Ricky Ng, Stephen Wai-Yan Lai, Wai Yu Felix Wong, Cheung Fai Lee
  • Publication number: 20080076810
    Abstract: Benzourea compounds of Formula I having aryl-(CH2)x-oxazolidinedione or aryl-(CH2)x-thiazolidinedione substituents on one of the N atoms of the benzourea ring, wherein x is 0 or 1, are PPAR gamma agonists or partial agonists and are useful in the treatment and control of type II diabetes, including hyperglycemia and other symptoms such as dyslipidemia, hyperlipidemia, hypercholesterolemia, hypertriglyceridemia, and obesity, that are often associated with type 2 diabetes.
    Type: Application
    Filed: May 26, 2005
    Publication date: March 27, 2008
    Inventors: Weiguo Lui, Harold B. Wood, Fiona Wai-Yu Lau-Phua
  • Patent number: 7333078
    Abstract: A driving system and method for electroluminescence displays having a matrix of electroluminescence elements arrayed in rows and columns with a control circuit for discharging each anode line to a column equalization bus (CEB), includes connecting the charged anode line to the CEB at the end of activation of each anode line. Discharging and subsequent de-activation of the anode line are allowed by charge-sharing with un-activated anode lines that are to be activated for the next row. This is accomplished by connecting the charged anode line to the CEB. In displaying images, anode lines are activated for a number of time periods according to gray scale or color data. Anode lines are consequently de-activated accordingly at different times during a lighting phase for each row display time. When anode lines are discharged through charge sharing on the CEB, a control circuit maintains the voltage on the CEB below a level that may cause inadvertent activation of the de-activated elements.
    Type: Grant
    Filed: December 29, 2003
    Date of Patent: February 19, 2008
    Assignee: Solomon Systech Limited
    Inventors: Wai-Yan Stephen Lai, Chung Yee Ricky Ng, Wai Yu Wong
  • Publication number: 20070265332
    Abstract: Tricyclic compounds containing a cyclopropyl carboxylic acid or carboxylic acid derivative (e.g. amide) fused to a bicyclic ring, including pharmaceutically acceptable salts and prodrugs thereof, are agonists of G-protein coupled receptor 40 (GPR40) and are useful as therapeutic compounds, particularly in the treatment of Type 2 diabetes mellitus, and of conditions that are often associated with this disease, including obesity and lipid disorders, such as mixed or diabetic dyslipidemia, hyperlipidemia, hypercholesterolemia, and hypertriglyceridemia.
    Type: Application
    Filed: May 11, 2007
    Publication date: November 15, 2007
    Inventors: Min Ge, Jiafang He, Fiona Wai Yu Lau, Gui-Bai Liang, Songnian Lin, Weiguo Liu, Shawn P. Walsh, Lihu Yang
  • Publication number: 20070184352
    Abstract: Using a non-aqueous electrolyte secondary battery containing lithium iron phosphate as a positive electrode active material and graphite as a negative electrode active material, a low-cost, high energy density battery is provided that exhibits good performance at high rate current and good cycle performance even at high temperature. The non-aqueous electrolyte secondary battery has a positive electrode having a positive electrode current collector and a positive electrode active material-containing layer formed on a surface of the positive electrode current collector, the positive electrode active material-containing layer containing a conductive agent and a positive electrode active material including lithium iron phosphate, a negative electrode containing a carbon material, and a non-aqueous electrolyte. The non-aqueous electrolyte contains vinylene carbonate.
    Type: Application
    Filed: February 6, 2007
    Publication date: August 9, 2007
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Kazunori Donoue, Denis Yau Wai Yu, Hiroshi Kurokawa, Takao Inoue, Masahisa Fujimoto
  • Patent number: 6967196
    Abstract: In accordance with the present invention, there is provided a novel class of sulfonamide compounds. Compounds of the invention contain a core sulfonamide group. Variable moieties connected to the sulfur atom and nitrogen atom of the sulfonamide group include substituted or unsubstituted hydrocarbyl moieties, substituted or unsubstituted heterocycle moieties, polycyclic moieties, halogen, alkoxy, ether, ester, amide, sulfonyl, sulfonamidyl, sulfide, carbamate, and the like. Invention compounds are capable of a wide variety of uses. For example sulfonamide compounds can act to modulate production of amyloid ? protein and are useful in the prevention or treatment of a variety of diseases. Pharmaceutical compositions containing invention compounds are also provided. Such compositions have wide utility for the prevention or treatment of a variety of diseases.
    Type: Grant
    Filed: February 22, 2000
    Date of Patent: November 22, 2005
    Assignees: Bristol-Myers Squibb Company, Merck & Co. Inc.
    Inventors: David W. Smith, Benito Munoz, Kumar Srinivasan, Carl P. Bergstrom, Prasad V. Chaturvedula, Milind S. Deshpande, Daniel J. Keavy, Wai Yu Lau, Michael F. Parker, Charles P. Sloan, Owen B. Wallace, Henry Hui Wang
  • Patent number: 6501226
    Abstract: A driving system and its corresponding driving scheme for electroluminescence displays that employs the principle of electric charge conservation and recycling in order to reduce switching current requirement against the system power source. In an electroluminescence display of a matrix of electroluminescence elements arrayed in rows and columns, wherein anodes of the electroluminescence elements on each row being electrically connected to a corresponding anode line, and cathodes of the electroluminescence elements on each column being electrically connected to a corresponding cathode line, a driving system for driving said electroluminescence display comprises a row/column control circuit for lighting at least one of said electroluminescence elements by establishing an electrical route across the power source and the ground in a driving scheme. The driving scheme sequentially scans each of the cathode lines while simultaneously drives at least one of the anode lines during each scanning.
    Type: Grant
    Filed: February 12, 2001
    Date of Patent: December 31, 2002
    Assignee: Solomon Systech Limited
    Inventors: Wai-Yan Stephen Lai, Wah Chi Raymond Wang, Hing Kau Stephen Cheung, Wai Yu Felix Wong, Chung Yee Ricky Ng
  • Publication number: 20020097002
    Abstract: A driving system and its corresponding driving scheme for electroluminescence displays that employs the principle of electric charge conservation and recycling in order to reduce switching current requirement against the system power source. In an electroluminescence display of a matrix of electroluminescence elements arrayed in rows and columns, wherein anodes of the electroluminescence elements on each row being electrically connected to a corresponding anode line, and cathodes of the electroluminescence elements on each column being electrically connected to a corresponding cathode line, a driving system for driving said electroluminescence display comprises a row/column control circuit for lighting at least one of said electroluminescence elements by establishing an electrical route across the power source and the ground in a driving scheme. The driving scheme sequentially scans each of the cathode lines while simultaneously drives at least one of the anode lines during each scanning.
    Type: Application
    Filed: February 12, 2001
    Publication date: July 25, 2002
    Inventors: Wai-Yan Stephen Lai, Wah Chi Raymond Wang, Hing Kau Stephen Cheung, Wai Yu Felix Wong, Chung Yee Ricky Ng
  • Patent number: D503889
    Type: Grant
    Filed: May 28, 2003
    Date of Patent: April 12, 2005
    Assignee: Far East (Wu's) Industrial Co LTD
    Inventor: Wai Yu Yeung
  • Patent number: D497221
    Type: Grant
    Filed: December 3, 2003
    Date of Patent: October 12, 2004
    Assignee: Far East (Wu's) Industrial Co LTD
    Inventor: Wai Yu Yeung