IDiyas

For the Inventor, By the Inventor

Kyoto, Japan

Hiroaki Hayashi

USPTO Granted Patents = 14

Average Co-Inventor Count = 2.2

ph-index = 6

Forward Citations = 110(Granted Patents)


Location History:

  • Kyoyo, JP (2010)
  • Kyoto, JP (2001 - 2011)

Company Filing History:

goldMedal14 out of 5,993 
 
Rohm Co., Ltd.
 patents

Years Active: 2001-2011

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14 patents (USPTO):Explore Patents
1. 8084973 - Motor driving circuit (2011-12-27),
2. 7800328 - Fan motor driving circuit (2010-09-21),
3. 7796867 - Motor drive device and cooling device using the same (2010-09-14),
4. 7786688 - Motor drive circuit (2010-08-31),
5. 6791069 - Heater with improved heat conductivity (2004-09-14),
6. 6724503 - Image sensor substrate and image sensor employing it (2004-04-20),
7. 6558024 - Casing of image sensor and method of making the same (2003-05-06),
8. 6483528 - Thermal print head and method of manufacturing thereof (2002-11-19),
9. 6469724 - Thick-film thermal print head and its manufacturing method (2002-10-22),
10. 6454573 - Board-cable connection structure (2002-09-24),
11. 6448993 - Construction of thermal print head and method of forming protective coating (2002-09-10),
12. 6331868 - Thermal printhead and method of making the same (2001-12-18),
13. 6304280 - Thermal printhead and method of making the same (2001-10-16),
14. 6275246 - Thermal printhead (2001-08-14),

Title: Innovations of Hiroaki Hayashi

Introduction

Hiroaki Hayashi is a prominent inventor based in Kyoto, Japan. He has made significant contributions to the field of motor control technology, holding a total of 14 patents. His work focuses on enhancing the efficiency and functionality of motor driving circuits.

Latest Patents

One of his latest patents is a motor driving circuit that generates pulse driving signals to control the ON/OFF state of a switching circuit connected to a motor coil. This innovation allows for precise control over the conduction period of the motor. The driving signal generating circuit modulates the driving signals based on the torque target value for the motor. Additionally, a current detection circuit monitors the current flowing through the motor coil, while a current limiting circuit ensures that the detected current does not exceed a predetermined upper limit. This upper limit can be adjusted during the motor's starting operation, providing enhanced control.

Another notable patent is a fan motor driving circuit that manages the energized state of a fan motor. This circuit performs on and off control of a switching circuit connected to the fan motor coil. A variable reference voltage circuit generates a voltage that changes over time, which is crucial during the startup phase of the fan motor. The drive signal combining unit generates drive signals based on this voltage, facilitating effective control of the fan motor.

Career Highlights

Hiroaki Hayashi has built a successful career at Rohm Co., Ltd., where he has been instrumental in developing advanced motor control technologies. His innovative designs have significantly improved the performance of various motor-driven applications.

Collaborations

Throughout his career, Hayashi has collaborated with talented coworkers, including Takumi Yamade and Eiji Yokoyama. Their combined expertise has contributed to the successful development of cutting-edge technologies in the field.

Conclusion

Hiroaki Hayashi's contributions to motor control technology through his patents demonstrate his innovative spirit and dedication to advancing engineering solutions. His work continues to influence the industry and inspire future innovations.

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