Arrangements Or Circuits At The Transmitter End (epo) Patents (Class 348/E5.012)

E Subclasses

For mixing the synchronizing signals with the picture signal or mutually (epo) (Class 348/E5.013)
For mutually locking plural sources of synchronizing signals, e.g., studios or relay stations (epo) (Class 348/E5.014)
  • Projection unit and projection type image display apparatus
    Patent number: 7798655
    Abstract: A projection unit 17 effectively corrects out of focus due to a temperature rise. A mirror holding mechanism of a concave mirror 25 has a mirror holder 41 and a mirror holder base 42. The concave mirror 25 is slidably housed in the mirror holder 41. A focus correction member 57, which expands by heat, is disposed between a back face of the concave mirror 25 and reference plane S formed in the mirror holder. The concave mirror 25 and the focus correction element 57 are urged to the reference plane S by a mirror retainer spring 59.
    Type: Grant
    Filed: June 27, 2007
    Date of Patent: September 21, 2010
    Assignee: Konica Minolta Opto, Inc.
    Inventors: Atsushi Matsuura, Shinichi Suzuki