Patents by Inventor Kenneth Li

Kenneth Li 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: 20110075105
    Abstract: Multi-color light sources are mixed in a recycling housing to achieve high light output. In one embodiment, the light from each color light source, such as from red, green and blue LEDs, is multiplexed together and a portion of the mixed light passes through an output aperture in the light pipe. A portion of each colored light is recycled back, for example, by a shaped reflective surface and/or a reflective coating adjacent the aperture. The shape of the reflective surface is such as to direct each color of light back to a specific location to maximize the ultimate output light. In one embodiment, the light is directed back from the output side of the housing to an input light source having the same color. In another embodiment, the light is directed back from the output side of the housing to a coating designed to reflect that color light.
    Type: Application
    Filed: September 27, 2010
    Publication date: March 31, 2011
    Applicant: Wavien, Inc.
    Inventors: George Ouyang, Kenneth Li
  • Publication number: 20100060867
    Abstract: A pseudo light pipe comprises an input end, an output end and a light transmission medium. The input end collects rays of light from a light source. The output end outputs and collimates the rays of the light collected at the input end. The output end has a convex curvature. The light transmission medium interconnects the input and output end, and transmits the rays of the light from the input end to the output end. The convex curvature of the output end is selected to output parallel rays of light. A projection system incorporating the pseudo light pipe and a dual paraboloid reflector (DPR) system.
    Type: Application
    Filed: September 8, 2009
    Publication date: March 11, 2010
    Inventor: KENNETH LI
  • Publication number: 20100045937
    Abstract: A recycling system and method for increasing the brightness of light output using at least one recycling light pipe with at least one light source. The output end of the recycling light pipe reflects a first portion of the light back to the light source, a second portion the light to the input end of the recycling light pipe, and transmits the remaining portion of the light as output. The recycling system is incorporated into a projector to provide color projected image with increased brightness. The light source can be white LEDs, color LEDs, and dual paraboloid reflector (DPR) lamp.
    Type: Application
    Filed: August 17, 2009
    Publication date: February 25, 2010
    Inventor: KENNETH LI
  • Publication number: 20090128781
    Abstract: A micro-projector comprises an LED layer, a light pipe coupled to the LED, a LCOS panel, a projection lens, a PBS, an aperture layer coupled to the output end of the light pipe which has a transmissive opening for transmitting a portion of the light output and a reflective surface for reflecting the remaining portion of the light output toward the input end of the light pipe. Thus, the remaining portion of the light output is recycled back to the LED to increase the brightness of the light output of the LED. The micro-projector also comprises a reflective polarizer disposed between the light pipe and the aperture layer for transmitting the light output of a predetermined polarization and reflecting other polarization of the light output, thereby recycling unused polarization of the light output back to the LED to increase the brightness of the light output of the LED.
    Type: Application
    Filed: January 20, 2009
    Publication date: May 21, 2009
    Inventor: Kenneth Li
  • Publication number: 20080030630
    Abstract: A multi-positional rear projection television (RPTV) capable of being placed in varying positions without compromising the orientation of the displayed image includes a projection engine for producing an image, a screen for displaying an image to an audience, a reflector for reflecting an image to a screen, image inversion circuitry for adjusting an orientation of the image to the vantage orientation of an audience depending on the position of the multi-positional RPTV, and a casing defining a substantially triangular cavity for housing at least the screen and the reflector. The screen is tilted with respect to the reflector, such that the casing forms a substantially triangular cavity with substantially zero footprint, thereby permitting the multi-positional RPTV to be mounted on a wall.
    Type: Application
    Filed: June 18, 2007
    Publication date: February 7, 2008
    Inventor: Kenneth Li
  • Publication number: 20070291491
    Abstract: An illumination system for increasing the brightness of a light source comprises an optical recycling device coupled to the light source, preferably light emitting diode (LED), for spatially and/or angularly recycling light. The optical recycling device spatially recycles a portion of rays of light emitted by the LED back to the light source using a reflector or mirror and/or angularly recycles high angle rays of light and transmits small angle rays of light, thereby increasing the brightness of the light source's output.
    Type: Application
    Filed: June 13, 2007
    Publication date: December 20, 2007
    Inventors: Kenneth Li, Seiji Inatsugu
  • Publication number: 20070247694
    Abstract: A light pipe based projection engine includes a X-prism transmitting substantially light of a useful polarization in an output direction and reflecting substantially light of a non-useful polarization in a first orthogonal direction substantially orthogonal to the output direction. An initial reflector may reflect the non-said low, said medium, and said high bands of wavelengths in a second orthogonal direction substantially orthogonal to the output direction and the first orthogonal direction, and a final reflector may reflect the non-said low, said medium, and said high bands of wavelengths in the output direction. The non-said low, said medium, and said high bands of wavelengths may be rotated substantially to light of the useful polarization by the initial and final reflectors.
    Type: Application
    Filed: February 2, 2007
    Publication date: October 25, 2007
    Inventor: Kenneth Li
  • Publication number: 20070053178
    Abstract: A LCD display backlight system with improved color mixing and efficiency comprises a reflective surface, a plurality of light sources mounted on the reflective surface, a plurality of fractional wave plates and a reflective polarizer. The plurality of fractional wave plates is mounted on spaces between the plurality of light sources on the reflective surface. The reflective polarizer transmits light having a useable polarization and reflects back unused polarization of light onto the reflective surface. A portion of the unused polarization of light reflected from the reflective polarizer passes through a fractional wave plate. The reflective surface reflects the portion of the unused polarization of light through the fractional wave plate such that the polarization of the unused polarization of light is changed to useable polarization, thereby recycling the unused polarization of light into useful light.
    Type: Application
    Filed: September 6, 2006
    Publication date: March 8, 2007
    Inventors: Kenneth Li, Seiji Inatsugu
  • Publication number: 20070047078
    Abstract: A waveguide polarization recovery system both polarizes the input light energy for use with an LCD imager and converts the polarity of unusable light energy to add to the illumination of the LCD imager. The compact polarization recovery waveguide system generally includes: (1) an input waveguide that provides non-polarized light energy into the system; (2) an output waveguide that receives polarized light energy from the system; (3) a polarized beam splitter that received the light energy from the input waveguide and transmits lights energy of a first polarization type and reflects light energy of a second polarization type, and (4) a wave plate that modifies the polarization of either the transmitted or reflected light energy. The polarization recovery system also generally includes one or more mirrors that are positioned as need to direct the transmitted and the reflected light energy to the output waveguide. The input and output waveguides may be shaped as needed by the projection system.
    Type: Application
    Filed: October 31, 2006
    Publication date: March 1, 2007
    Inventor: Kenneth Li
  • Publication number: 20060274438
    Abstract: A condensing and collecting optical system comprises two asymmetric reflectors. The first and second reflectors comprise a portion of an ellipsoid or paraboloid of revolution having parallel optical axis. A source of electromagnetic radiation is placed at one of the focal points of the first reflector to produce radiation that is received by the second reflector, which focuses the radiation toward a target. To achieve maximum output coupling efficiency, the second reflector has a different focal length than the first reflector such that the radiation inputted to the target has lower angle of incidence.
    Type: Application
    Filed: June 29, 2006
    Publication date: December 7, 2006
    Inventor: Kenneth Li
  • Publication number: 20060256564
    Abstract: A compact dual ellipsoidal reflector (DER) system for illuminating a target with rays of electromagnetic radiation comprises first and second molded module. The first molded module has at least a first ellipsoidal reflector section comprising an optical axis, a first focal point and a second focal point. The rays of electromagnetic radiation being directed substantially proximate to the first focal point of the first ellipsoidal reflector section and substantially converge at the second focal point of the first ellipsoidal reflector section. The second molded module has at least a second ellipsoidal reflector section comprising an optical axis, a first focal point and a second focal point.
    Type: Application
    Filed: July 17, 2006
    Publication date: November 16, 2006
    Inventor: Kenneth Li
  • Publication number: 20060253097
    Abstract: A method of treating a diabetic condition of a patient comprises providing a glucose detection system which is portable and usable by the patient, and which is configured to measure glucose levels with a standard error of less than about 30 mg/dL. The method further comprises making a plurality of measurements of the patient's glucose level with the portable, patient-usable glucose detection system. The method further comprises administering a diabetes treatment to the patient based on one or more of the measurements of the patient's glucose level.
    Type: Application
    Filed: October 21, 2005
    Publication date: November 9, 2006
    Inventors: James Braig, Kenneth Li, Peter Rule, Richard Keenan
  • Publication number: 20060239602
    Abstract: A waveguide polarization recovery system both polarizes the input light energy for use with an LCD imager and converts the polarity of unusable light energy to add to the illumination of the LCD imager. The compact polarization recovery waveguide system generally includes: (1) an input waveguide that provides non-polarized light energy into the system; (2) an output waveguide that receives polarized light energy from the system; (3) a polarized beam splitter that received the light energy from the input waveguide and transmits light energy of a first polarization type and reflects light energy of a second polarization type, and (4) a wave plate that modifies the polarization of either the transmitted or reflected light energy. The polarization recovery system also generally includes one or more mirrors that are positioned as need to direct the transmitted and the reflected light energy to the output waveguide. The input and output waveguides may be shaped as needed by the projection system.
    Type: Application
    Filed: June 26, 2006
    Publication date: October 26, 2006
    Inventor: Kenneth Li
  • Publication number: 20060227557
    Abstract: An illumination system using filament lamps including a filament lamp, a reflector having a first and second focal points, the filament lamp disposed proximate to the first focal point of the reflector to emit rays of electromagnetic radiation that reflect from the reflector and converge substantially at the second focal point, wherein a portion of the electromagnetic radiation emitted by the filament lamp impinges directly on the reflector and a portion of the electromagnetic radiation does not impinge directly on the reflector and wherein the system further includes an additional reflector constructed and arranged to reflect at least part of the portion of the electromagnetic radiation that does not impinge directly on the reflector toward the reflector through the first focal point of the reflector.
    Type: Application
    Filed: March 22, 2006
    Publication date: October 12, 2006
    Inventor: Kenneth Li
  • Publication number: 20060209409
    Abstract: A waveguide polarization recovery system both polarizes the input light energy for use with an LCD imager and converts the polarity of unusable light energy to add to the illumination of the LCD imager. The compact polarization recovery waveguide system generally includes: (1) an input waveguide that provides non-polarized light energy into the system; (2) an output waveguide that receives polarized light energy from the system; (3) a polarized beam splitter that received the light energy from the input waveguide and transmits light energy of a first polarization type and reflects light energy of a second polarization type, and (4) a wave plate that modifies the polarization of either the transmitted or reflected light energy. The polarization recovery system also generally includes one or more mirrors that are positioned as need to direct the transmitted and the reflected light energy to the output waveguide. The input and output waveguides may be shaped as needed by the projection system.
    Type: Application
    Filed: April 28, 2006
    Publication date: September 21, 2006
    Inventor: Kenneth Li
  • Publication number: 20060194325
    Abstract: A fluid handling and analysis system is provided. The system includes a main analysis and control instrument and a fluid handling module that are removably engageable with the main instrument. The main instrument comprises a spectroscopic bodily fluid analyzer and at least one control element. The fluid handling module includes a spectroscopic sample cell and at least one fluid handling element, and the sample cell is accessible via the fluid handling element. The fluid handling element has a control interface configured to engage the control element when the main instrument and the fluid handling module are engaged.
    Type: Application
    Filed: December 21, 2005
    Publication date: August 31, 2006
    Inventors: Jennifer Gable, James Braig, Kenneth Li, Mark Wechsler, Peng Zheng, Richard Keenan
  • Publication number: 20060195045
    Abstract: A fluid handling module is configured for removable engagement with a reusable main fluid handling instrument. The module comprises a housing, an infusion fluid passageway, a sample fluid passageway, and a fluid component separator. The infusion fluid passageway has a first port and a second port spaced from the first port, and a lumen extending from the first port to the second port. The sample fluid passageway is connected to the infusion fluid passageway. The fluid component separator is connected to the sample fluid passageway.
    Type: Application
    Filed: December 21, 2005
    Publication date: August 31, 2006
    Inventors: Jennifer Gable, James Braig, Kenneth Li, Kenneth Witte, Mark Wechsler, Peng Zheng, Richard Keenan
  • Publication number: 20060193146
    Abstract: A multiple output illumination system includes a first and second reflectors each having an optical axis and a first and second focal points substantially on the optical axis. In one embodiment, one of the focal points of each reflector are proximate to one another, while the other focal point of each reflector is distal from each other. In another embodiment, the first and second reflectors are pairs of reflectors, and the second reflector of each points away from the optical axes of the first and second reflectors. An intermediate reflector may redirect radiation from the second reflectors. A source of electromagnetic radiation substantially proximate to the focal points that are proximate to one another produces rays of radiation that are reflected by the each reflector in different directions, converging substantially at each of the distal focal points. Light pipes placed substantially proximate to the distal focal points may collect the radiation.
    Type: Application
    Filed: October 2, 2003
    Publication date: August 31, 2006
    Inventors: Kenneth Li, Sheldon Sillyman
  • Publication number: 20060188407
    Abstract: A fluid handling module is configured for removable engagement with a reusable main fluid handling instrument. The module includes a module housing and a first fluid passageway extending from the module housing. The first fluid passageway has a patient end remote from the housing. The first fluid passageway is configured to provide fluid communication with a bodily fluid in a patient. A fluid component separator is in fluid communication with the first fluid passageway. The fluid component separator is configured to separate at least one component from a portion of the bodily fluid drawn from the patient. A spectroscopic sample cell is configured to hold at least a portion of the first component.
    Type: Application
    Filed: December 21, 2005
    Publication date: August 24, 2006
    Inventors: Jennifer Gable, James Braig, Kenneth Li, Mark Wechsler, Peng Zheng, Richard Keenan
  • Publication number: 20060133732
    Abstract: An optical coupling element for use in large numerical aperture collecting and condensing systems. The optical coupling element includes a curved surface such as a lens at the output of a tapered light pipe (TLP). The TLP in combination with the curved surface alters the divergence angle and the area of the light exiting the curved surface. Electromagnetic radiation emitted by a source is collected and focused onto a target by positioning the source of electromagnetic radiation substantially at a first focal point of a primary reflector so that the primary reflector produces rays of radiation reflected from the primary reflector that converge at a second focal point of the secondary reflector. The optical coupling element is positioned so that its input end is substantially proximate with the second focal point of the secondary reflector.
    Type: Application
    Filed: January 31, 2006
    Publication date: June 22, 2006
    Inventor: Kenneth Li