Patents Represented by Attorney, Agent or Law Firm Yoshihiro Ichii
  • Patent number: 6222677
    Abstract: The invention provides a newly designed head mounted virtual image display that is dramatically less in weight than is known in the art by virtue of a unique beam folding design, making possible wearable computer systems of significantly greater convenience and acceptability to a wide range of users. The unit may be used comfortably in conjunction with eyeglasses. Optical systems according to the invention are provided that are advantageous for use with emissive, transmissive and reflective microdisplays, and which provide high optical performance, compact design and clear see-through properties. Also, the invention provides an improved method of illumination for reflection liquid crystal microdisplays. This makes possible optical systems for virtual image displays of improved field of view, compactness, and shorter image path combined with good efficiency.
    Type: Grant
    Filed: November 10, 1999
    Date of Patent: April 24, 2001
    Assignee: International Business Machines Corporation
    Inventors: Russell A. Budd, Derek B. Dove
  • Patent number: D436960
    Type: Grant
    Filed: September 10, 1999
    Date of Patent: January 30, 2001
    Assignee: International Business Machines Corporation
    Inventors: Russell A. Budd, Derek B. Dove, Shinji Nakai, Tetsune Toyokawa