Patents by Inventor Kai-Cheong Kwan

Kai-Cheong Kwan 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).

  • Magnetic structure for compact imaging device
    Patent number: 8593743
    Abstract: The subject matter disclosed herein relates to electromagnetic force generation for an imaging device having a small form factor.
    Type: Grant
    Filed: July 19, 2011
    Date of Patent: November 26, 2013
    Assignee: Hong Kong Applied Science and Technology Research Institute Co., Ltd.
    Inventors: Kin Ming Fan, Kwok Sing Cheng, Kai Cheong Kwan
  • Interchangeable zoom lens actuator
    Patent number: 8428451
    Abstract: The subject matter disclosed herein relates to an optical module that includes interchangeable lenses to adjust a zoom level of the optical module.
    Type: Grant
    Filed: July 25, 2011
    Date of Patent: April 23, 2013
    Assignee: Hong Kong Applied Science and Technology Research Institute Co. Ltd.
    Inventors: Chuen Kuen Yeung, Kai Cheong Kwan, Kwok Sing Cheng
  • INTERCHANGEABLE ZOOM LENS ACTUATOR
    Publication number: 20130028581
    Abstract: The subject matter disclosed herein relates to an optical module that includes interchangeable lenses to adjust a zoom level of the optical module.
    Type: Application
    Filed: July 25, 2011
    Publication date: January 31, 2013
    Applicant: Hong Kong Applied Science and Technology Research Institute Co. Ltd.
    Inventors: Cheun Kuen Yeung, Kai Cheong Kwan, Kwok Sing Cheng
  • MAGNETIC STRUCTURE FOR COMPACT IMAGING DEVICE
    Publication number: 20130021685
    Abstract: The subject matter disclosed herein relates to electromagnetic force generation for an imaging device having a small form factor.
    Type: Application
    Filed: July 19, 2011
    Publication date: January 24, 2013
    Applicant: Hong Kong Applied Science and Technology Research Institute Co. Ltd.
    Inventors: Kin Ming Fan, Kwok Sing Cheng, Kai Cheong Kwan
  • COMPACT IMAGING DEVICE
    Publication number: 20120026612
    Abstract: The subject matter disclosed herein relates to an imaging device having a small form factor.
    Type: Application
    Filed: August 22, 2011
    Publication date: February 2, 2012
    Applicant: Hong Kong Applied Science and Technology Research Institute Co. Ltd.
    Inventors: Kin Ming Fan, Kai Cheong Kwan, Kwok Sing Cheng, Sio Kuan Lam
  • Compact imaging device
    Patent number: 8031419
    Abstract: An imaging apparatus may comprise a lens assembly including one or more lenses, an image sensor to receive light from the lens assembly, and an actuator to adjust a position of the lens assembly. An actuator may be mounted on an image sensor, wherein a surface area of the actuator need not extend substantially beyond a surface area of the image sensor.
    Type: Grant
    Filed: July 28, 2009
    Date of Patent: October 4, 2011
    Assignee: Hong Kong Applied Science and Technology Research Institute, Co., Ltd.
    Inventors: Kin Ming Fan, Kai Cheong Kwan, Kwok Sing Cheng, Sio Kuan Lam
  • Laser emitting material, method for making the same and use thereof
    Patent number: 7912108
    Abstract: A solid-state laser emitting material for use in conjunction with a light source includes a polymer matrix functioning as host materials, containing laser dye of rhodamine 590 or rhodamine 610 as gain materials and nano-submicron particles as scatters therein. The lowest lasing threshold of the laser emitting material is approximately 5 mJ/cm2 for 585 nm emission and 2 mJ/cm2 for 630 nm emission.
    Type: Grant
    Filed: January 11, 2008
    Date of Patent: March 22, 2011
    Assignee: The Hong Kong Polytechnic University
    Inventors: Xiaoming Tao, Xiaohong Sun, Jianguo Deng, Kai-Cheong Kwan
  • COMPACT IMAGING DEVICE
    Publication number: 20110026149
    Abstract: The subject matter disclosed herein relates to an imaging device having a small form factor.
    Type: Application
    Filed: July 28, 2009
    Publication date: February 3, 2011
    Applicant: Hong Kong Applied Science and Technology Research Institute Co., Ltd.
    Inventors: Kin Ming Fan, Kai Cheong Kwan, Kwok Sing Cheng, Sio Kuan Lam
  • COMPACT IMAGING DEVICE
    Publication number: 20100238346
    Abstract: The subject matter disclosed herein relates to an imaging device having a small form factor.
    Type: Application
    Filed: March 17, 2009
    Publication date: September 23, 2010
    Applicant: Hong Kong Applied Science and Technology Research Institute Co. Ltd.
    Inventors: Sio Kuan Lam, Kwok Sing Cheng, Kai Cheong Kwan
  • Anti-Shaking Optical Element For Optical Imaging Systems
    Publication number: 20100226010
    Abstract: The present invention provides an optical system comprising, at least one lens group for projecting an image on an image sensing means, an optical path being defined between a light entrance of said optical system and said image sensing means, a reflective optical element having convergent or divergent optical power and being located in said optical path, and means for moving the reflective optical element in response to unwanted movement of the imaging system to eliminate or mitigate the negative imaging effect of the said unwanted movement.
    Type: Application
    Filed: March 4, 2009
    Publication date: September 9, 2010
    Inventors: Kai Cheong Kwan, Tao Pan, Sio Kuan Lam
  • Laser emitting material, method for making the same and use thereof
    Publication number: 20090161699
    Abstract: A solid-state laser emitting material for use in conjunction with a light source includes a polymer matrix functioning as host materials, containing laser dye of rhodamine 590 or rhodamine 610 as gain materials and nano-submicron particles as scatters therein. The lowest lasing threshold of the laser emitting material is approximately 5 mJ/cm2 for 585 nm emission and 2 mJ/cm2 for 630 nm emission.
    Type: Application
    Filed: January 11, 2008
    Publication date: June 25, 2009
    Inventors: Xiaoming Tao, Xiaohong Sun, Jianguo Deng, Kai-Cheong Kwan
  • Laser emitting material, method for making the same and use thereof
    Publication number: 20070091967
    Abstract: A solid-state laser emitting material for use in conjunction with a light source includes a polymer matrix functioning as host materials, containing laser dye of rhodamine 590 or rhodamine 610 as gain materials and nano-submicron particles as scatters therein. The lowest lasing threshold of the laser emitting material is approximately 5 mJ/cm2 for 585 nm emission and 2 mJ/cm2 for 630 nm emission.
    Type: Application
    Filed: October 6, 2005
    Publication date: April 26, 2007
    Inventors: Xiaoming Tao, Xiaohong Sun, Jianguo Deng, Kai-Cheong Kwan