Patents by Inventor Chee Keong Chong

Chee Keong Chong 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: 20050040323
    Abstract: A cylindrical encoder has a cylinder with a coding surface that is disposed about a rotational axis. The coding surface has code lines that spiral along the cylinder about the rotational axis. Resolution depends on the pitch, or spacing, of the code lines, and on the angle at which the code lines are oriented to the rotational axis. An imaging system positioned for optical coupling to the coding surface senses a succession of moving code lines as the cylinder rotates about the rotational axis.
    Type: Application
    Filed: August 21, 2003
    Publication date: February 24, 2005
    Inventors: Chee-Keong Chong, Boon Lee, Kee Goh
  • Patent number: 6806583
    Abstract: A light source suitable for surface mounting onto a printed circuit board. The light source includes a planar substrate with a centrally positioned recess. A light emitting diode is mounted in the recess and the substrate is encapsulated by a transparent encapsulant material forming an ellipsoidal dome over the light emitting diode.
    Type: Grant
    Filed: June 25, 2001
    Date of Patent: October 19, 2004
    Assignee: Agilent Technologies, Inc.
    Inventors: Huck Khim Koay, Seong Choon Lim, Cheng Why Tan, Gurbir Singh A/L Balwant Singh, Chee Keong Chong, Sundar a/l Natarajan Yoganandan
  • Patent number: 6768101
    Abstract: A high resolution optical encoder with an angular collimated light beam. The optical encoder includes a source, a collimator, a reflective surface and a receiver. The light beam is collimated using a collimator and/or source at an angle to the plane of the reflective surface.
    Type: Grant
    Filed: June 4, 2003
    Date of Patent: July 27, 2004
    Assignee: Agilent Technologies, Inc.
    Inventors: Boon Kheng Lee, Kee Siang Goh, Yee Long Chin, Chee Keong Chong, Gurbir Singh
  • Publication number: 20040113057
    Abstract: An optical encoder device (100) comprises an optical encoder for detecting codewheel/codestrip positions, an optical encoder housing of accommodating the optical encoder, a first tapered guidepost (103) protruding from a sidewall (102) of the optical encoder housing, said first guidepost (103) having a star-shaped cross-section and being arranged adjacent to the optical encoder, and a second tapered guidepost (104) protruding from the sidewall (102) of the optical encoder housing and extending substantially parallel to the first guidepost (103), said second guidepost (104) having a diamond-shaped cross-section and being arranged remote from the optical encoder.
    Type: Application
    Filed: August 6, 2003
    Publication date: June 17, 2004
    Inventors: Kok Hing Fo, Kee Yean Ng, Chee Keong Chong, Kean Loo Keh, Herbert W. Loesch
  • Publication number: 20030193015
    Abstract: An optical encoder device (100) comprises: an optical emitter (103) for emitting light, the optical emitter (103) having a light emission direction (E); an optical detector (104) for detecting light emitted by the optical emitter (103), the optical detector (104) having a light detection direction (D) which is different from the light emission direction (E); an optical element (109) for controlling an optical path (108) between the optical emitter (103) and the optical detector (104) such that light emitted by the optical emitter (103) can be detected by the optical detector (104); and a free area (113) in the optical encoder device (100) for accommodating a moveable optical encoding unit (112) comprising a plurality of alternating transparent and opaque encoding elements such that the plurality of alternating transparent and opaque encoding elements of the optical encoding unit (112) is able to affect the optical path (108).
    Type: Application
    Filed: February 20, 2003
    Publication date: October 16, 2003
    Inventors: Chee Keong Chong, Yee Loong Chin
  • Publication number: 20020047130
    Abstract: A light source suitable for surface mounting onto a printed circuit board. The light source includes a planar substrate with a centrally positioned recess. A light emitting diode is mounted in the recess and the substrate is encapsulated by a transparent encapsulant material forming an ellipsoidal dome over the light emitting diode.
    Type: Application
    Filed: June 25, 2001
    Publication date: April 25, 2002
    Inventors: Huck Khim Koay, Seong Choon Lim, Cheng Why Tan, Gurbir Singh A/L Balwant Singh, Chee Keong Chong, Sundar a/I Natarajan Yoganandan
  • Patent number: 6242280
    Abstract: A method of interconnecting bond pads on a semiconductor die to leads of a package is disclosed. The method includes placing a connector over each bond pad and its corresponding lead. The connector is one of a plurality of ganged connectors. The method also includes electrically connecting the connector to the bond pad and the lead and singularizing the connector from the plurality of ganged connectors. Such a method of interconnection has the advantage of simultaneously interconnecting multiple bond pads to leads. In a preferred embodiment, light-emitting diodes (LEDs) are manufactured using the method. A PCB is etched to produced lead pairs of the LEDs. A semiconductor die is attached to a first lead of each lead pair. Ganged interconnects are aligned with and tagged onto the dies and the second leads of the lead pairs, thereby electrically connecting them. After tagging, the interconnects are singularized. An encapsulant is applied on each die and interconnect.
    Type: Grant
    Filed: June 30, 1999
    Date of Patent: June 5, 2001
    Assignee: Agilent Technologies, Inc.
    Inventors: Huck Khim Koay, Cheng Why Tan, Chee Keong Chong, Gurbir Singh, Sundar A L Natarajan Yoganandan, Seong Choon Lim