Patents by Inventor Ka Ho Liu

Ka Ho Liu 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).

  • Display arrangement with optical structure for reducing halo effect
    Patent number: 8833959
    Abstract: A display arrangement includes a decoration layer, a light source underneath the decoration layer, and a lens layer arranged between the decoration layer and the light source. The decoration layer includes at least one void formed in the shape of a character when viewed from above. The lens layer is at least semi-transparent to permit transmission of light from the light source through the void. An optical structure is arranged in alignment with the void and is adapted to reduce intensity of the light in a peripheral region of the void so as to reduce a halo effect. The decoration layer may be formed as an external layer of a key or a button of a portable electronic device, or an outer casing of a portable electronic device.
    Type: Grant
    Filed: February 2, 2012
    Date of Patent: September 16, 2014
    Assignee: BlackBerry Limited
    Inventors: Hsin Chin Lee, Antanas Matthew Broga, Ka Ho Liu
  • DISPLAY ARRANGEMENT WITH OPTICAL STRUCTURE FOR REDUCING HALO EFFECT
    Publication number: 20130201692
    Abstract: A display arrangement includes a decoration layer, a light source underneath the decoration layer, and a lens layer arranged between the decoration layer and the light source. The decoration layer includes at least one void formed in the shape of a character when viewed from above. The lens layer is at least semi-transparent to permit transmission of light from the light source through the void. An optical structure is arranged in alignment with the void and is adapted to reduce intensity of the light in a peripheral region of the void so as to reduce a halo effect. The decoration layer may be formed as an external layer of a key or a button of a portable electronic device, or an outer casing of a portable electronic device.
    Type: Application
    Filed: February 2, 2012
    Publication date: August 8, 2013
    Inventors: Hsin Chin Lee, Antanas Matthew Broga, Ka Ho Liu