Patents by Inventor Kean Loo Keh

Kean Loo Keh 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).

  • Patent number: 8651703
    Abstract: A light emitting device with at least one LED die, a filter element and a reflective element. The filter element may be configured to preferentially attenuate light passing through the filter element, such that light output has improved color uniformity when compared to similar light emitting devices without a filter element.
    Type: Grant
    Filed: April 9, 2010
    Date of Patent: February 18, 2014
    Assignee: Intellectual Discovery Co., Ltd.
    Inventors: Kum Soon Wong, Farn Hin Chen, Kean Loo Keh
  • Patent number: 8384103
    Abstract: In an embodiment, the invention provides a light source comprising a plurality of light-emitting semiconductor chips, a plurality of electrical leads and an encapsulant. The plurality of electrical leads is connected to the plurality of light-emitting semiconductor chips. The encapsulant completely encases the plurality of semiconductor chips. The encapsulant partially encases the plurality of electrical leads.
    Type: Grant
    Filed: March 4, 2010
    Date of Patent: February 26, 2013
    Assignee: Intellectual Discovery Co., Ltd.
    Inventors: Kum Soon Wong, Lig Yi Yong, Kean Loo Keh
  • Patent number: 8174100
    Abstract: A light source is described herein. An embodiment of the light source comprises a mounting surface and a first lead frame. The first lead frame extends from the mounting surface. The first lead frame comprises a first portion extending from the mounting surface; a cup portion having a cup portion first side and a cup portion second side, the cup portion first side configured to receive a light-emitting diode, the cup portion second side being located opposite the cup portion first side; and a second portion extending between the first portion and the cup portion second side.
    Type: Grant
    Filed: September 22, 2008
    Date of Patent: May 8, 2012
    Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.
    Inventors: Lig Yi Yong, Siang Ling Oon, Kean Loo Keh
  • Patent number: 8120056
    Abstract: An electronic assembly includes a Light Emitting Diode (LED) mounted on a top surface of a heat spreader, at least two electrical contacts co-planar with the heat spreader, and at least one heat slug mounted on the top surface of the heat spreader, where the heat slug is made of high thermal conductive plastic.
    Type: Grant
    Filed: October 19, 2009
    Date of Patent: February 21, 2012
    Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.
    Inventors: Lig Yi Yong, Kean Loo Keh, Keat Chuan Ng
  • Patent number: 8101955
    Abstract: In an embodiment, the invention provides a PLCC package comprising first and second lead frames, a plastic structural body, a light source, an encapsulant, and an optical lens. The first lead frame comprises two tongues and a reflector cup. The first and second lead frames are attached to the plastic structural body. The light source is mounted and electrically connected at the bottom of the inside of the reflector cup. The light source is also electrically connected to the second lead frame by a wire bond. The reflector cup is surrounded on at least four sides by the encapsulant, the encapsulant having a domed portion that functions as the optical lens, the encapsulant being an integral single piece structure.
    Type: Grant
    Filed: April 17, 2009
    Date of Patent: January 24, 2012
    Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.
    Inventors: Kean Loo Keh, Lig Yi Yong, Kum Soon Wong
  • Publication number: 20110249422
    Abstract: A light emitting device with at least one LED die, a filter element and a reflective element. The filter element may be configured to preferentially attenuate light passing through the filter element, such that light output has improved color uniformity when compared to similar light emitting devices without a filter element.
    Type: Application
    Filed: April 9, 2010
    Publication date: October 13, 2011
    Inventors: Kum Soon Wong, Farn Hin Chen, Kean Loo Keh
  • Patent number: 8034644
    Abstract: Methods of making a light emitter are disclosed herein. An embodiment of a method comprises fabricating a line of first leads, the line of first leads comprising a plurality connected individual first leads; fabricating a line of second leads, the line of second leads comprising a plurality of connected individual second leads; physically connecting the line of first leads to the line of second leads, wherein a first individual first lead is adjacent a first individual second lead; attaching a light emitting device to the first individual first lead; electrically connecting the light emitting device to the first individual second lead; encapsulating a portion of the individual first lead and a portion of the individual second lead as a single unit; and separating the encapsulated first individual lead and the second individual lead from the first line of leads and the second line of leads.
    Type: Grant
    Filed: January 23, 2009
    Date of Patent: October 11, 2011
    Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.
    Inventors: Kean Loo Keh, Lig Yi Yong, Kum Soon Wong
  • Publication number: 20110215347
    Abstract: In an embodiment, the invention provides a light source comprising a plurality of light-emitting semiconductor chips, a plurality of electrical leads and an encapsulant. The plurality of electrical leads is connected to the plurality of light-emitting semiconductor chips. The encapsulant completely encases the plurality of semiconductor chips. The encapsulant partially encases the plurality of electrical leads.
    Type: Application
    Filed: March 4, 2010
    Publication date: September 8, 2011
    Applicant: AVAGO TECHNOLOGIES ECBU IP (SINGAPORE) PTE. LTD.
    Inventors: Kum Soon Wong, Lig Yi Yong, Kean Loo Keh
  • Patent number: 7951863
    Abstract: Method for packaging a photo detector integrated circuit (IC) and a pigment filter and resulting package are described. An encapsulated package (e.g., an epoxy-encapsulated package) that includes a first surface is provided. A filter layer is then coated directly onto the first surface. The filter layer provides optical filtering properties (e.g., a predetermined filtering profile) in addition to the filtering provided by the pigment filter.
    Type: Grant
    Filed: May 7, 2007
    Date of Patent: May 31, 2011
    Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.
    Inventors: Kean Loo Keh, Chin Hin Oon, Boon Keat Tan
  • Publication number: 20110089460
    Abstract: An electronic assembly includes a Light Emitting Diode (LED) mounted on a top surface of a heat spreader, at least two electrical contacts co-planar with the heat spreader, and at least one heat slug mounted on the top surface of the heat spreader, where the heat slug is made of high thermal conductive plastic.
    Type: Application
    Filed: October 19, 2009
    Publication date: April 21, 2011
    Applicant: Avago Technologies ECBU IP (Singapore) Pte. Ltd.
    Inventors: Lig Yi Yong, Kean Loo Keh, Keat Chuan Ng
  • Publication number: 20110089448
    Abstract: In an embodiment, the invention provides a light source comprising a plurality of light-emitting semiconductor chips, a plurality of electrical leads and an encapsulant. The plurality of electrical leads is connected to the plurality of light-emitting semiconductor chips. The encapsulant completely encases the plurality of semiconductor chips. The encapsulant partially encases the plurality of electrical leads.
    Type: Application
    Filed: October 20, 2009
    Publication date: April 21, 2011
    Applicant: AVAGO TECHNOLOGIES ECBU IP (SINGAPORE) PTE. LTD.
    Inventors: Lig Yi Yong, Kum Soon Wong, Kean Loo Keh
  • Patent number: 7777355
    Abstract: Organometallic colloid(s) is dispersed in a polymer matrix to form an infrared-blocking encapsulant.
    Type: Grant
    Filed: November 17, 2005
    Date of Patent: August 17, 2010
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Janet Bee Yin Chua, Kean Loo Keh
  • Publication number: 20100190279
    Abstract: Methods of making a light emitter are disclosed herein. An embodiment of a method comprises fabricating a line of first leads, the line of first leads comprising a plurality connected individual first leads; fabricating a line of second leads, the line of second leads comprising a plurality of connected individual second leads; physically connecting the line of first leads to the line of second leads, wherein a first individual first lead is adjacent a first individual second lead; attaching a light emitting device to the first individual first lead; electrically connecting the light emitting device to the first individual second lead; encapsulating a portion of the individual first lead and a portion of the individual second lead as a single unit; and separating the encapsulated first individual lead and the second individual lead from the first line of leads and the second line of leads.
    Type: Application
    Filed: January 23, 2009
    Publication date: July 29, 2010
    Applicant: Avago Technologies ECBU IP(Singapore)Pte.Ltd.
    Inventors: Kean Loo Keh, Lig Yi Yong, Kum Soon Wong
  • Patent number: 7737638
    Abstract: A light-emitting device having an anode and a cathode is disclosed herein. An embodiment of the light-emitting device comprises a first lead connected to the anode of the light-emitting device and a second lead connected to the cathode of the light-emitting device. The first lead has a first bend, wherein the direction of the first bend indicates that the first lead is connected to the anode. The second lead has a second bend, wherein the direction of the second bend indicates that the second lead is connected to the cathode.
    Type: Grant
    Filed: March 26, 2008
    Date of Patent: June 15, 2010
    Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.
    Inventors: Lig Yi Yong, Siang Ling Oon, Kean Loo Keh, Kum Soon Wong
  • Publication number: 20100072592
    Abstract: A light source is described herein. An embodiment of the light source comprises a mounting surface and a first lead frame. The first lead frame extends from the mounting surface. The first lead frame comprises a first portion extending from the mounting surface; a cup portion having a cup portion first side and a cup portion second side, the cup portion first side configured to receive a light-emitting diode, the cup portion second side being located opposite the cup portion first side; and a second portion extending between the first portion and the cup portion second side.
    Type: Application
    Filed: September 22, 2008
    Publication date: March 25, 2010
    Applicant: Avago Technologies ECBU IP (Singapore) Pte. Ltd.
    Inventors: Lig Yi Yong, Siang Ling Oon, Kean Loo Keh
  • Patent number: 7649161
    Abstract: A light source having a first mixing chamber, a light pipe structure, and a controller is disclosed. The first mixing chamber includes a first plurality of LEDs, the first mixing chamber having a first transparent window through which light from the first plurality of LEDs exits the first mixing chamber. The light pipe structure has a first end optically coupled to the window such that light from the first plurality of LEDs enters the first end and a second end through which the light exits. The controller determines the power that is applied to the first plurality of LEDs and includes a photodetector optically coupled to the second end of the light pipe structure. The photodetector generates signals indicative of an intensity of light generated by the LEDs, the controller causing the LEDs to be powered such that the signal matches a target value.
    Type: Grant
    Filed: May 3, 2007
    Date of Patent: January 19, 2010
    Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.
    Inventors: Kean Loo Keh, Lig Yi Yong, Yoke Peng Boay
  • Patent number: 7609291
    Abstract: A device and method for producing an enhanced color image of a scene of interest captures a grayscale image of the scene of interest using a flash of infrared light and a color image of the scene of interest without using any flash of infrared light. The grayscale information from the grayscale image and the visible color information from the color image are combined to produce the enhanced color image.
    Type: Grant
    Filed: December 7, 2005
    Date of Patent: October 27, 2009
    Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.
    Inventors: Chin Hin Oon, Kean Loo Keh, Farn Hin Chen, Eit Thian Yap, Gim Eng Chew, Kee Yean Ng, Thye Linn Mok, Wool Kin Goon, Rene P. Helbing, Janet Bee Yin Chua
  • Publication number: 20090243465
    Abstract: A light-emitting device having an anode and a cathode is disclosed herein. An embodiment of the light-emitting device comprises a first lead connected to the anode of the light-emitting device and a second lead connected to the cathode of the light-emitting device. The first lead has a first bend, wherein the direction of the first bend indicates that the first lead is connected to the anode. The second lead has a second bend, wherein the direction of the second bend indicates that the second lead is connected to the cathode.
    Type: Application
    Filed: March 26, 2008
    Publication date: October 1, 2009
    Inventors: Lig Yi Yong, Siang Ling Oon, Kean Loo Keh, Kum Soon Wong
  • Patent number: 7570246
    Abstract: A visible light communications transmitter combines a modulated carrier signal with a pulse from a pulse generator. The carrier signal is modulated according to data read from a buffer during the pulse.
    Type: Grant
    Filed: August 1, 2005
    Date of Patent: August 4, 2009
    Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.
    Inventors: Selvan Maniam, Eit Thian Yap, Kean Loo Keh
  • Patent number: D596593
    Type: Grant
    Filed: September 5, 2008
    Date of Patent: July 21, 2009
    Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.
    Inventors: Lig Yi Yong, Kum Soon Wong, Kean Loo Keh