Patents by Inventor Ke Yean Ng

Ke Yean Ng 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).

  • Light emitting devices with a phosphor coating having evenly dispersed phosphor particles and constant thickness
    Patent number: 7129638
    Abstract: A light emitter, being an LED or laser diode, is disposed above a base substrate, and a coating material containing a dye compound, such as an epoxy material containing a fluorescent or luminescent substance, is applied over the light emitter. The base substrate includes a raised platform on which the light emitter is mounted, such that the light emitter is supported at a prescribed distance from the surrounding base substrate. The device allows the dye compound within the coating material to settle into the recessed base substrate surrounding the platform and leave the sides of the light emitter able to retain only a coating of the dye comparable in thickness to that coating remaining on the upper surface of the light emitter, in order to improve the uniformity of the light distribution pattern emitted from the device.
    Type: Grant
    Filed: August 8, 2001
    Date of Patent: October 31, 2006
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventor: Ke Yean Ng