Patents by Inventor Kheng Tan

Kheng Tan 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: 20190232001
    Abstract: A respiratory device includes a blower having an inlet and an outlet, a patient interface, and a valve including a valve member that is rotatable through a first angular displacement in a first direction from a first position to a second position. The outlet of the blower is coupled to the patient interface so that positive pressure is provided to a patient's airway via the patient interface when the valve member is in the first position. The inlet of the blower is coupled to the patient interface so that negative pressure is provided to the patient's airway via the patient interface when the valve member is in the second position. The valve member is rotatably oscillated back and forth when the valve member is in the first position and when the valve member is in the second position so that oscillations in the positive pressure and negative pressure, respectively, are provided to the patient's airway.
    Type: Application
    Filed: April 11, 2019
    Publication date: August 1, 2019
    Inventors: Chau Chong Ye, Vinay Joshi, Suresha Venkataraya, Nookarajesh Varma Sangadi, Joel Preetham Fernandes, Jack Barney Sing, Eugene Hong Kheng Kung, Wei Teik Daniel Tan, Cong Jiang, Siew Ying Koh, Graham Keith Lacy, Sergio Malorni, Alexander Cristian Hautenne Hanson
  • Publication number: 20160226223
    Abstract: Various VCSEL device packages and VCSEL array configurations are disclosed. In one example, a device contains two or more VCSELs, each VCSEL having a substantially triangular body. Such device packages allow for denser VCSEL array configurations than those provided by traditional VCSEL device packages. The denser VCSEL array configurations not only allow for more VCSELs to be batch manufactured per wafer but also allow for denser layouts on various mounting surfaces.
    Type: Application
    Filed: January 30, 2015
    Publication date: August 4, 2016
    Inventors: Leonard Ian Kheng Tan, Chee Siong Peh, David Graham McIntyre
  • Publication number: 20150237534
    Abstract: A communications apparatus, suitable for establishing a wireless communications connection with a further apparatus, comprises first and second communications means. The first communications means is suitable to establish a wireless communication connection with the further apparatus and the second communications means is operable to retrieve identification information from such further apparatus. The first communications means is operable only to establish a wireless communication connection with a further apparatus on the basis of an authorisation made on the basis of information retrieved from the further apparatus by the second communications means.
    Type: Application
    Filed: May 5, 2015
    Publication date: August 20, 2015
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Siok Kheng TAN, Zhong FAN
  • Patent number: 9060312
    Abstract: A Communications apparatus, suitable for establishing a wireless communications connection with a further apparatus, comprises first and second communications means. The first communications means is suitable to establish a wireless communication connection with the further apparatus and the second communications means is operable to retrieve identification information from such further apparatus. The first communications means is operable only to establish a wireless communication connection with a further apparatus on the basis of an authorization made on the basis of information retrieved from the further apparatus by the second communications means.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: June 16, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Siok Kheng Tan, Zhong Fan
  • Publication number: 20120309356
    Abstract: A Communications apparatus, suitable for establishing a wireless communications connection with a further apparatus, comprises first and second communications means. The first communications means is suitable to establish a wireless communication connection with the further apparatus and the second communications means is operable to retrieve identification information from such further apparatus. The first communications means is operable only to establish a wireless communication connection with a further apparatus on the basis of an authorisation made on the basis of information retrieved from the further apparatus by the second communications means.
    Type: Application
    Filed: November 20, 2009
    Publication date: December 6, 2012
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Siok Kheng Tan, Zhong Fan
  • Publication number: 20080064287
    Abstract: A light emitting device having a die that includes a light source that generates light of a first wavelength and a layer of phosphor particles covering the die is disclosed. The phosphor particles convert a portion of the light of the first wavelength to light of a second wavelength. The light source can be fabricated by attaching the light source to a substrate, and converting the light source by applying a light converting layer that includes a volatile carrier material and particles of a phosphor that convert light of the first wavelength to light of the second wavelength over the light source. The volatile carrier material is then caused to evaporate leaving a layer of the phosphor particles over the light source. A binder material can be incorporated in the volatile carrier for binding the phosphor particles to one another after the volatile carrier material is evaporated.
    Type: Application
    Filed: November 8, 2007
    Publication date: March 13, 2008
    Applicant: Avago Technologies ECBU IP (Singapore) Pte. Ltd.
    Inventors: Kee Ng, Kheng Tan, Wen Ou
  • Publication number: 20070252246
    Abstract: A packaged circuit and method for packaging an integrated circuit are disclosed. The packaged circuit has a lead frame, an integrated circuit chip, and an encapsulating layer. The lead frame has first and second sections, the first section including a lateral portion, a chip mounting area and a first extension. The integrated circuit chip is mounted in the chip mounting area and is in thermal contact with the chip mounting area. The encapsulating layer has top, bottom, and first and second side surfaces. The first extension is bent to provide a first heat path from the chip mounting area to the bottom surface. The heat path connects the heat chip mounting area to the bottom surface without passing through the first and second side surfaces and provides a heat path that has less thermal resistance than the heat path through either the lateral portion or the second section.
    Type: Application
    Filed: May 1, 2006
    Publication date: November 1, 2007
    Inventors: Kee Ng., Hui Koay, Chiau Lee, Kheng Tan, Wei Loo, Keat Ng., Alzar Abdul Norfidathul
  • Publication number: 20070228402
    Abstract: A method and apparatus is described for a light-emitting diode with high light output. A polymeric cup to reflect light holds a light-emitting diode chip connected to surface-mounting leads and is filled with an optically clear filter. The use of a polymeric cup allows for better bonding between the cup and the filler.
    Type: Application
    Filed: March 31, 2006
    Publication date: October 4, 2007
    Inventors: Ak Leong, Kheng Tan
  • Publication number: 20060226772
    Abstract: A method for producing a light emitting device using two phosphors dispersed homogenously in a host matrix. The host matrix may be a polymer, such as heat and/or UV curable epoxy, silica glass, silica gel, silicone, etc. A dispersant, preferably inorganic, is applied to the host matrix to create a strong and stable three dimensional network within the host matrix. The BGS and ZnSeS phosphors are trapped equally in the three dimensional network, holding them homogenously in place within the host matrix. In one embodiment, the inorganic dispersant can be a hydrophobic formed silica, such as, for example, R812.
    Type: Application
    Filed: April 6, 2005
    Publication date: October 12, 2006
    Inventors: Kheng Tan, Su Oon, Wen Ou, Azlida Ahmad
  • Publication number: 20060192125
    Abstract: A light source is disclosed. The light source has a light-emitting chip that includes an LED that generates light in an active region thereof. The LED emits a light signal in a forward direction, and infrared radiation generated in the active region is emitted in a side direction in the form of a first infrared signal. The first light signal is determined by a first drive signal coupled to the LED. The light source also includes an infrared detector positioned to collect a portion of the infrared signal. The infrared detector generates a heat signal indicative of the amount of infrared radiation detected. A controller generates the drive signal so as to maintain the heat signal at a first target value. In light sources having LEDs that emit in different spectral ranges, the infrared detectors can all detect heat in the same spectral range.
    Type: Application
    Filed: February 28, 2005
    Publication date: August 31, 2006
    Inventors: Sundar Yoganandan, Fakhrul Mohd. Afif, Klan Lee, Slew Pang, Kheng Tan, Yew Kuan, Su Oon, Wen Ou, Norfidathul Abdul Karim, Thye Mok
  • Publication number: 20060186428
    Abstract: A light emitting device and method for fabricating the device utilizes an adhesive layer of siloxane material to enhance the adhesion of an encapsulant to a light source, one or more leadframes and/or a reflector cup surface. The siloxane layer can be used in different types of light emitting devices, such as lead frame-mounted light emitting diodes (LEDs) and surface mount LEDs with or without reflector cups.
    Type: Application
    Filed: February 23, 2005
    Publication date: August 24, 2006
    Inventors: Kheng Tan, Kee Ng, Shir Ng, Wen Ou
  • Publication number: 20060139914
    Abstract: A light source and a method for operating the same are disclosed. The light source includes a light emitter and a controller. The light emitter generates light in response to a control signal coupled thereto. The light emitter is characterized by an age related to the amount of light that has been cumulatively generated by the light emitter, the generated light for a given control signal changing with the age. The controller measures the age of the light emitter and generates the control signal based on the desired light intensity and the measured age of the light emitter. In one embodiment, the controller stores an age value for the light emitter, and the controller determines the control signal in response to an input signal specifying a desired light intensity from the light emitter, the controller updating the age value each time the control signal is determined.
    Type: Application
    Filed: December 23, 2004
    Publication date: June 29, 2006
    Inventors: Sundar Yoganandan, Thye Mok, Kian Lee, Norfidathul Karim, Su Oon, Siew Pang, Kheng Tan, Fakhrul Afif, Wen Ou, Yew Kuan
  • Publication number: 20060138938
    Abstract: A light source having a light emitting semiconductor device on a die and a light conversion layer is disclosed. The die emits light of a first wavelength. The light conversion layer overlies the die and includes a first soluble fluorescent dye and a second fluorescent dye in a solid clear plastic carrier. The first and second florescent dyes convert the light entering the conversion layer to light of second and third wavelengths, respectively. At least one of the first and second dyes is excited by light of the first wavelength. In one embodiment, the second and third wavelengths are present in a ratio of intensities such that the light leaving the light conversion layer is perceived as white light by a human observer. The light conversion layer may be divided into sub-layers that include the individual dyes.
    Type: Application
    Filed: December 27, 2004
    Publication date: June 29, 2006
    Inventors: Kheng Tan, Arosh Tajul, Janet Yin Chua, Kok Pan, Kee Ng
  • Publication number: 20060113895
    Abstract: A light emitting device utilizes multiple layers of quantum dots to convert at least some of the original light emitted from a light source of the device to longer wavelength light to produce an output light. The light emitting device is made by forming the multiple layers of quantum dots over a light source and then forming an encapsulant over the multiple layers of quantum dots. The multiple layers of quantum dots can be used to produce broad-spectrum color light, such as white light.
    Type: Application
    Filed: November 30, 2004
    Publication date: June 1, 2006
    Inventors: Tajul Baroky, Janet Yin Chua, Kok Pan, Kee Ng, Kheng Tan
  • Publication number: 20060103589
    Abstract: A device and method for providing illuminating light utilizes quantum dots to convert at least some of the original light emitted from a light source of the device to longer wavelength light to change the color characteristics of the illuminating light. The quantum dots may be included in the light source, a light panel and/or an optional interface medium of the device.
    Type: Application
    Filed: November 18, 2004
    Publication date: May 18, 2006
    Inventors: Janet Bee Chua, Kok Pan, Kee Ng, Kheng Tan, Tajul Baroky
  • Publication number: 20060092644
    Abstract: Disclosed are systems and methods which provide an illuminator configuration in which an optical element is provided integral with a reflector component. Embodiments provide an LED encapsulation optical element having a boundary with a surrounding medium, such as air, which avoids or minimizes total internal reflection phenomena. Such an LED encapsulation optical element is formed integral with a reflector component in order to ensure proper relative placement of the LED light source, optical element, and reflector component and/or to facilitate rapid and predictable mechanical assembly of an illuminator. Plated through holes may be disposed in a substrate beneath the LED light source to dissipate heat from the LED light source, prolonging the life of the LED light source and/or the encapsulation material.
    Type: Application
    Filed: October 28, 2004
    Publication date: May 4, 2006
    Inventors: Thye Mok, Meng Lee, Chien Lye, Kheng Tan
  • Publication number: 20060081862
    Abstract: A device and method for emitting output light utilizes both quantum dots and non-quantum fluorescent material to convert at least some of the original light emitted from a light source of the device to longer wavelength light to change the color characteristics of the output light. The device can be used to produce broad-spectrum color light, such as white light.
    Type: Application
    Filed: October 14, 2004
    Publication date: April 20, 2006
    Inventors: Janet Chua, Kok Pan, Kee Ng, Kheng Tan, Tajul Baroky
  • Publication number: 20060071593
    Abstract: A method for packaging a light emitting device, in which a primary light generator, such as a light emitting diode semiconductor die or laser diode, is attached to a lead frame and covered with a body of phosphor material so as to form a predetermined thickness of phosphor material covering the primary light generator. The body of phosphor material may be contained in a substantially transparent container or preformed, compressed disc. The resulting light emitting device has a primary light generator covered by phosphor material that is constrained to have a predetermined thickness.
    Type: Application
    Filed: October 5, 2004
    Publication date: April 6, 2006
    Inventors: Kheng Tan, Tajul Baroky, Janet Chua, Kok Pan, Kee Ng
  • Publication number: 20060066210
    Abstract: A light emitting device in which a primary light generator, such as a light emitting diode (LED) or laser diode, is operable to emit a primary light that is received by a body of wavelength converting material. A portion of the primary light is absorbed by the body of wavelength converting material and is emitted as secondary light. The wavelength converting material contains phosphor nano-particles and larger phosphor particles. The phosphor nano-particles prevent transmission of primary light while the larger phosphor particles provide efficient light conversion.
    Type: Application
    Filed: September 30, 2004
    Publication date: March 30, 2006
    Inventors: Kee Ng, Kheng Tan, Tajul Baroky, Janet Chua, Kok Pan
  • Publication number: 20060038198
    Abstract: A device and method for producing output light having a wavelength spectrum in the visible wavelength range and the infrared wavelength range uses a fluorescent material to convert at least some of the original light emitted from a light source of the device to longer wavelength light to produce the output light. The light source may be configured to generate light having a peak wavelength in an ultraviolet-and-visible wavelength range. The fluorescent material may include any combination of red, green, blue and yellow phosphors.
    Type: Application
    Filed: August 23, 2004
    Publication date: February 23, 2006
    Inventors: Janet Chua, Kok Pan, Kee Ng, Kheng Tan, Tajul Baroky