Patents by Inventor Kousuke Miyaji

Kousuke Miyaji 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).

  • Memory controller, data storage device and memory control method using data utilization ratio
    Patent number: 9977733
    Abstract: When a data utilization ratio R which is a utilization ratio of sectors in one page is not lower than a threshold value Rth1 and when write data is not frequently-rewritten data, a flash memory is controlled such that the write data is stored into the flash memory. When the data utilization ratio R which is the utilization ratio of sectors in one page is lower than the threshold value Rth1 or when the write data is frequently-rewritten data although the data utilization ratio R is not lower than the threshold value Rth1, a ReRAM is controlled such that the write data is stored into the ReRAM. This suppresses deterioration of the flash memory.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: May 22, 2018
    Assignee: THE UNIVERSITY OF TOKYO
    Inventors: Ken Takeuchi, Kousuke Miyaji, Koh Johguchi, Hiroki Fujii
  • MEMORY CONTROLLER, DATA STORAGE DEVICE AND MEMORY CONTROL METHOD
    Publication number: 20150006796
    Abstract: When a data utilization ratio R which is a utilization ratio of sectors in one page is not lower than a threshold value Rth1 and when write data is not frequently-rewritten data, a flash memory is controlled such that the write data is stored into the flash memory. When the data utilization ratio R which is the utilization ratio of sectors in one page is lower than the threshold value Rth1 or when the write data is frequently-rewritten data although the data utilization ratio R is not lower than the threshold value Rth1, a ReRAM is controlled such that the write data is stored into the ReRAM. This suppresses deterioration of the flash memory.
    Type: Application
    Filed: March 30, 2012
    Publication date: January 1, 2015
    Applicant: THE UNIVERSITY OF TOKYO
    Inventors: Ken Takeuchi, Kousuke Miyaji, Koh Johguchi, Hiroki Fujii