This inventor holds 2 USPTO granted patents. Top assignees: Oki Electric Industrial Co., Ltd., Oki Electric Industry Co., Ltd.. Active years: 1994-1996.
Company Filing History:
1 out of 10 
1 out of 4,980 Years Active: 1994-1996
Title: Innovations of Tutomu Tabata in Optical Data Technology.
Introduction
Tutomu Tabata is a notable inventor based in Tokyo, Japan. He has made significant contributions to the field of optical data technology, holding 2 patents that showcase his innovative approach to improving optical pickup systems.
Latest Patents
His latest patents include advancements in tracking adjustment using the sum of the maximum and minimum tracking values. In this invention, an optical pickup emits a light beam onto a recording medium and outputs, in response to a reflection from the medium, a first and a second signal for controlling focusing servo control and tracking servo control, respectively. A signal generating section generates a focus error signal and a tracking error signal in response to the first and second signals, respectively. A driving section is responsive to the output of the signal generating section for outputting a first and a second drive current assigned to focusing and tracking, respectively. An actuator moves the pickup in a focusing direction and a tracking direction by the first and second drive currents, respectively. An adjusting section detects two values close to the maximum and minimum values of the tracking error signal at the start of the focusing servo control and adjusts the gain of the second signal based on a difference between the detected values. Alternatively, the offset of the second signal may be adjusted by the sum of the two detected values. Furthermore, the offset of the first signal may be adjusted by a focus offset occurring when the amplitude of the first and second signals appearing after the start of the focusing servo control or the amplitude of a third signal also outputted by the pickup and representative of recorded data and appearing after the start of tracking servo is close to the maximum.
Career Highlights
Throughout his career, Tutomu Tabata has worked with prominent companies such as Oki Electric Industry Co., Ltd. and Oki Electric Industrial Co., Ltd. His work has significantly impacted the development of optical data technologies.
Collaborations
He has collaborated with notable individuals in the field, including Shizuo Nagata and Yasuhiro Suzuki. Their combined expertise has contributed to the advancements in optical data technology.
Conclusion
Tutomu Tabata's innovative work in optical data technology has led to significant advancements in the field. His patents reflect a deep understanding of optical systems and their applications.