Patents by Inventor Larkhoon Leem

Larkhoon Leem 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).

  • Low power touch screen overlays for providing tactile feedback
    Patent number: 8866774
    Abstract: Tactile feedback for touch screens is provided by an overlay structure disposed on the top surface of the touch screen. This overlay structure can be in either of two states. In the first state (non-typing), the overlay structure has a uniform top surface. In the second state (typing), the overlay structure top surface has localized regions of increased vertical elevation to provide tactile feedback for typing. The overlay structure is configured to be switched between these two states by actuator(s) disposed to provide mechanical force(s) in lateral direction(s) to the overlay structure. Preferably, the actuator is a latching actuator (e.g., magnetic solenoid) that does not consume power to hold the overlay structure in either of its states. Thus, power is only consumed to switch the state of the overlay structure.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: October 21, 2014
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Larkhoon Leem, Sonny Vo
  • Low power touch screen overlays for providing tactile feedback
    Publication number: 20130002584
    Abstract: Tactile feedback for touch screens is provided by an overlay structure disposed on the top surface of the touch screen. This overlay structure can be in either of two states. In the first state (non-typing), the overlay structure has a uniform top surface. In the second state (typing), the overlay structure top surface has localized regions of increased vertical elevation to provide tactile feedback for typing. The overlay structure is configured to be switched between these two states by actuator(s) disposed to provide mechanical force(s) in lateral direction(s) to the overlay structure. Preferably, the actuator is a latching actuator (e.g., magnetic solenoid) that does not consume power to hold the overlay structure in either of its states. Thus, power is only consumed to switch the state of the overlay structure.
    Type: Application
    Filed: June 28, 2012
    Publication date: January 3, 2013
    Inventors: Larkhoon Leem, Sonny Vo