Patents by Inventor Masahisa Moroda

Masahisa Moroda 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).

  • Front light, reflective liquid crystal display device and personal digital assistant
    Patent number: 6636283
    Abstract: A compact and light weight front light, a reflective liquid crystal display device, and a personal digital assistant providing an image display of uniform brightness with high efficiency are provided. The front light includes a main optical guide plate and a second optical guide plate. The second optical guide plate is arranged at an end of the main optical guide plate along the widthwise direction, and, on an end surface opposite an end surface facing the main optical guide plate, grooves forming prisms are aligned along the longitudinal direction, extending in the depth direction. The front light further includes a point light source arranged at an end, in the longitudinal direction, of the second optical guide plate, and a reflective film covering the surfaces of the grooves.
    Type: Grant
    Filed: March 29, 2001
    Date of Patent: October 21, 2003
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Tomohiro Sasagawa, Kyoichiro Oda, Akimasa Yuuki, Naoto Sugawara, Masahiro Yokoi, Masahisa Moroda
  • Front light, reflective liquid crystal display device and personal digital assistant
    Publication number: 20010035927
    Abstract: A compact and light weight front light, a reflective liquid crystal display device and a personal digital assistant providing image display of uniform brightness with high efficiency are provided. The front light includes a main optical guide plate and a second optical guide plate. The second optical guide plate is arranged at an end portion of the main optical guide plate along the widthwise direction, and on an end surface opposite to an end surface facing the main optical guide plate, a plurality of prism- shaped grooves are formed along the longitudinal direction, extending in the depth direction. The front light further includes a point light source arranged at an end in the longitudinal direction of the second optical guide plate, and a reflective film covering the surface of the prism-shaped grooves.
    Type: Application
    Filed: March 29, 2001
    Publication date: November 1, 2001
    Inventors: Tomohiro Sasagawa, Kyoichiro Oda, Akimasa Yuuki, Naoto Sugawara, Masahiro Yokoi, Masahisa Moroda