Location History:
- Fukushima, JP (2003 - 2005)
- Tokyo, JP (2005)
Company Filing History:
Years Active: 2003-2005
Title: Hiroshi Ohtsu: Innovator in Optical Disc Technology
Introduction
Hiroshi Ohtsu is a prominent inventor based in Fukushima, Japan. He has made significant contributions to the field of optical disc technology, holding a total of 4 patents. His work focuses on improving the performance and efficiency of optical disc apparatuses.
Latest Patents
Ohtsu's latest patents include an innovative optical disc apparatus and a method for adjusting the servo of the same. In this patent, a minimum jitter value is established from each jitter value measured in correspondence to a successively changed servo constant. This value is multiplied by a prescribed ratio to set a jitter threshold value. By establishing servo constants corresponding to at least two jitter values that are substantially equal to the jitter threshold value, an optimum servo constant can be set based on the minimum of these two servo constants. This method allows for quick and accurate detection of the optimum servo constant, leading to improved servo adjustment.
Another notable patent is the optical pickup position control method. This method positions the relative position of an optical disk and an optical pickup to achieve the optimum jitter value of the detection signal obtained from the reflected light of an optical spot. The process includes a jitter value acquisition procedure that performs multiple feed operations within the adjustment range and obtains jitter values at each feed position. It also features an edge position setting procedure that identifies relative positions exceeding a preset jitter threshold value, along with an optimum position computation procedure to determine the best position for optimal jitter value.
Career Highlights
Hiroshi Ohtsu is currently employed at Sony Computer Entertainment Inc., where he continues to innovate in the field of optical technology. His work has significantly impacted the efficiency and performance of optical disc systems.
Collaborations
Ohtsu has collaborated with notable colleagues such as Hironobu Amemiya and Masaki Sugiyama, contributing to advancements in optical disc technology.
Conclusion
Hiroshi Ohtsu's contributions to optical disc technology through his patents and work at Sony Computer Entertainment Inc. highlight his role as a key innovator in this field. His advancements continue to influence the efficiency and performance of optical systems.