Patents by Inventor Taeko Tanaka

Taeko Tanaka 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).

  • Lens control device
    Patent number: 5786853
    Abstract: A lens control device includes a variator lens for zooming, a focusing lens for compensating for a focus plane position change associated with the variator lens' movement, a conversion lens for modifying the focal length determined by the variator lens, a driver for driving the variator lens and the focusing lens, and a control circuit for changing a driving speed of the variator lens between when the conversion lens is mounted and when the conversion lens is not mounted.
    Type: Grant
    Filed: April 6, 1995
    Date of Patent: July 28, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroto Ohkawara, Masahide Hirasawa, Taeko Tanaka
  • Image pickup apparatus for moving image photographing or for still image photographing
    Patent number: 5703638
    Abstract: An image pickup apparatus capable of performing shooting action control appositely to each of different modes of shooting such as moving image shooting and still image shooting includes an instructing part for selectively instructing the apparatus to perform moving image shooting or still image shooting, and a control part for variably setting control characteristics for various control actions such as backlight correction control, white balance control, automatic focusing control, shutter speed control, etc., according to the instruction of the instructing part.
    Type: Grant
    Filed: December 8, 1994
    Date of Patent: December 30, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventors: Seiya Ohta, Kitahiro Kaneda, Hirofumi Takei, Taeko Tanaka
  • Image pickup apparatus
    Patent number: 5594500
    Abstract: An image pickup apparatus, which includes an eye point sensor for detecting an eye point in a frame, a calculation circuit for calculating average coordinates of the eye point in the frame detected by the eye point sensor, a setting circuit for setting a distance measurement frame at the average coordinates output from the calculation circuit, and a control circuit for controlling the size of the distance measurement frame according to the focal length, is disclosed.An image pickup apparatus, which includes a focus calculation circuit for detecting a focus state by detecting the dispersion range of an eye point, is also disclosed.
    Type: Grant
    Filed: June 14, 1995
    Date of Patent: January 14, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventors: Taeko Tanaka, Kitahiro Kaneda
  • Automatic focusing device wherein lens movement is controlled in accordance with lens hunting
    Patent number: 5402175
    Abstract: An automatic focusing device including a focus detection circuit for detecting a focus state, and a motor for driving a focusing lens in accordance with an output from the focus detection circuit. The device controls the driving state of the motor in accordance with a result of comparing the amplitude of hunting of the focusing lens with a predetermined value when the direction of the drive of the focusing lens is reversed.
    Type: Grant
    Filed: November 24, 1992
    Date of Patent: March 28, 1995
    Assignee: Canon Kabushiki Kaisha
    Inventor: Taeko Tanaka