Syozo Takegawa

Title: Syozo Takegawa and Optical Disc Technology.

Introduction

Syozo Takegawa is an inventor associated with Daito, Japan, and Funai Electric Company Ltd. His listed work focuses on improving how optical disc readers locate and access tracks. Takegawa is credited with 2 patents.

Latest Patents

**Method and Apparatus for Accessing Track on an Optical Disc.** This invention uses a preliminary track jump and reads information from the track reached. It then calculates the disc’s actual linear velocity and uses that measurement to determine a correction factor. The reader applies the factor to set the number of tracks for a subsequent jump toward the destination block. The approach is designed to improve the accuracy of track access.

**Seeking Operation Control Apparatus in an Optical Disk Reader.** This apparatus calculates the track distance between the optical pickup’s current position and a desired track. A jump driver and controller move the pickup through repeated jumps, after which a reading controller directs it to read track information. By reducing how often the reader must obtain track information during seeking, the design aims to reach a desired track in less time.

Career Highlights

Takegawa’s listed patents address two related challenges in optical disc technology: accurately reaching a target track and reducing the time required to seek it. Both inventions describe coordinated use of track information, calculations, and controlled movement of an optical pickup.

Collaborations

Takegawa is associated with Funai Electric Company Ltd. His listed coworker is Masaru Muraoka.

Conclusion

Syozo Takegawa’s patent work centers on practical improvements to optical disc access, combining track-position calculations and controlled pickup movement to support faster, more reliable seeking.