Patents by Inventor Jae-Kyong Cho

Jae-Kyong Cho 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).

  • Patent number: 6876481
    Abstract: A spatial light modulator includes: a magnetic layer that is made of a magneto-optic material and includes a plurality of pixels in each of which a magnetization direction is independently set and each of which has a function of causing a rotation of a polarization direction of incident light depending on the magnetization direction by a magneto-optic effect; a plurality of first conductor layers and a plurality of second conductor layers arranged to intersect with each other at positions corresponding to the individual pixels, through which currents for generating magnetic fields to set the magnetization directions in the individual pixels are passed; and a plurality of dielectric layers for enhancing the function of the pixels. A polarization direction of light incident on the spatial light modulator is rotated depending on the magnetization direction of each pixel.
    Type: Grant
    Filed: June 13, 2001
    Date of Patent: April 5, 2005
    Assignee: Optware Corporation
    Inventors: Mitsuteru Inoue, Jae-Kyong Cho
  • Patent number: 6788448
    Abstract: A spatial light modulator includes a device portion and a bias field applying coil disposed around the device portion. The device portion includes a magnetic layer and two types of conductor layers. The magnetic layer is made of a magneto-optic material and includes a plurality of pixels whose directions of magnetization are set independently of one another. Each of the pixels causes rotation of a direction of polarization of incident light depending on its direction of magnetization due to a magneto-optic effect. The conductor layers generate a magnetic field for setting the direction of magnetization of each of the pixels of the magnetic layer. The magnetic layer has grooves for defining the borders of the individual pixels. The grooves are formed to extend from the top surface of the magnetic layer to a predetermined position between the top and bottom surfaces of the magnetic layer.
    Type: Grant
    Filed: December 3, 2002
    Date of Patent: September 7, 2004
    Assignee: Otpware Corporation
    Inventors: Mitsuteru Inoue, Jae Kyong Cho
  • Patent number: 6762872
    Abstract: A spatial light modulator includes a device portion and a bias field applying coil disposed around the device portion. The device portion includes a magnetic layer and two types of conductor layers. The magnetic layer is made of a magneto-optic material and includes a plurality of pixels whose directions of magnetization are set independently of one another. Each of the pixels causes rotation of a direction of polarization of incident light depending on its direction of magnetization due to a magneto-optic effect. The conductor layers generate a magnetic field for setting the direction of magnetization of each of the pixels of the magnetic layer. Each of the pixels includes two regions which can take different states of magnetization. Information is produced by changing the states of magnetization in those regions.
    Type: Grant
    Filed: December 3, 2002
    Date of Patent: July 13, 2004
    Assignee: Optware Corporation
    Inventors: Mitsuteru Inoue, Jae Kyong Cho
  • Publication number: 20040036948
    Abstract: A spatial light modulator includes a device portion and a bias field applying coil disposed around the device portion. The device portion includes a magnetic layer and two types of conductor layers. The magnetic layer is made of a magneto-optic material and includes a plurality of pixels whose directions of magnetization are set independently of one another. Each of the pixels causes rotation of a direction of polarization of incident light depending on its direction of magnetization due to a magneto-optic effect. The conductor layers generate a magnetic field for setting the direction of magnetization of each of the pixels of the magnetic layer. The magnetic layer has grooves for defining the borders of the individual pixels. The grooves are formed to extend from the top surface of the magnetic layer to a predetermined position between the top and bottom surfaces of the magnetic layer.
    Type: Application
    Filed: December 3, 2002
    Publication date: February 26, 2004
    Inventors: Mitsuteru Inoue, Jae Kyong Cho
  • Publication number: 20040036947
    Abstract: A spatial light modulator includes a device portion and a bias field applying coil disposed around the device portion. The device portion includes a magnetic layer and two types of conductor layers. The magnetic layer is made of a magneto-optic material and includes a plurality of pixels whose directions of magnetization are set independently of one another. Each of the pixels causes rotation of a direction of polarization of incident light depending on its direction of magnetization due to a magneto-optic effect. The conductor layers generate a magnetic field for setting the direction of magnetization of each of the pixels of the magnetic layer. Each of the pixels includes two regions which can take different states of magnetization. Information is produced by changing the states of magnetization in those regions.
    Type: Application
    Filed: December 3, 2002
    Publication date: February 26, 2004
    Inventors: Mitsuteru Inoue, Jae Kyong Cho
  • Publication number: 20020192505
    Abstract: A spatial light modulator includes: a magnetic layer that is made of a magneto-optic material and includes a plurality of pixels in each of which a magnetization direction is independently set and each of which has a function of causing a rotation of a polarization direction of incident light depending on the magnetization direction by a magneto-optic effect; a plurality of first conductor layers and a plurality of second conductor layers arranged to intersect with each other at positions corresponding to the individual pixels, through which currents for generating magnetic fields to set the magnetization directions in the individual pixels are passed; and a plurality of dielectric layers for enhancing the function of the pixels. A polarization direction of light incident on the spatial light modulator is rotated depending on the magnetization direction of each pixel.
    Type: Application
    Filed: June 13, 2001
    Publication date: December 19, 2002
    Applicant: OPTWARE CORPORATION
    Inventors: Mitsuteru Inoue, Jae-Kyong Cho