Toshihiko Hiroshima is a notable inventor based in Ota, Japan. He has made significant contributions to the field of optical disc technology, holding a total of 6 patents. His work focuses on improving the efficiency and accuracy of optical disc recording and playback systems.

Latest Patents

Hiroshima's latest patents include a tilt control method and apparatus for optical disc recording and playback. This innovation involves recording an offset adjustment signal in a test recording area on the inner side of a disc. The process modifies the level of a driving signal supplied to a tilt adjustment coil for offset detection. After recording, the offset adjustment signal is played back, and the peak level of the RF signal is detected. When the detected peak level reaches a maximum, the driving signal level is set as an offset value. This offset value is then added to a tilt signal to perform tilt control. Another patent also focuses on a similar tilt control method, where a β value is detected from the RF signal during playback, further enhancing the precision of tilt adjustments.

Career Highlights

Hiroshima is currently employed at Sanyo Electric Co., Ltd., where he continues to innovate in the field of optical technologies. His work has been instrumental in advancing the capabilities of optical disc systems, making them more reliable and efficient.

Collaborations

Hiroshima has collaborated with notable colleagues such as Yasushi Hanamoto and Yutaka Imamura. Their combined expertise has contributed to the successful development of various technologies in the optical disc domain.

Conclusion

Toshihiko Hiroshima's contributions to optical disc technology through his innovative patents have significantly impacted the industry. His work continues to pave the way for advancements in recording and playback systems, showcasing the importance of innovation in technology.

Profile summary based on public USPTO records.

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