Yasuhei Shimada

This inventor holds 12 USPTO granted patents. Top assignees: Nec Corporation, Nippon Electric Co., Ltd.. Active years: 1986-2000.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yasuhei Shimada. Retrieved from https://idiyas.com/inventor/yasuhei-shimada

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Calculating rank

USPTO Granted Patents = 12

% Patents Active = 100.0

Average Co-Inventor Count = 1.3

ph-index = 10

Forward Citations = 380(Granted Patents)

Company Filing History:

Nippon Electric Co., Ltd.

patents

Years Active: 1986-2000

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12 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 6075325 - Inverter and method for driving a plurality of cold cathode tubes in (2000-06-13),

2. 6028388 - Piezoelectric transformer driver (2000-02-22),

3. 6020719 - Secondary battery unit using electric double layer condenser (2000-02-01),

4. 5923546 - Control circuit and method for driving and controlling parasitic (1999-07-13),

5. 5886477 - Driver of cold-cathode fluorescent lamp (1999-03-23),

6. 5866969 - Actuating circuit of piezoelectric transformer and actuating method (1999-02-02),

7. 5859489 - Piezoelectric transformer driving circuit (1999-01-12),

8. 5731652 - Power source unit employing piezoelectric transformer (1998-03-24),

9. 5705877 - Piezoelectric transformer driving circuit (1998-01-06),

10. 5675484 - Wide input voltage range power supply with auto-transformers and (1997-10-07),

11. 4845661 - Display information processing apparatus (1989-07-04),

12. 4630039 - Display processing apparatus (1986-12-16),

Title: Yasuhei Shimada: Innovator in Piezoelectric Technology

Introduction

Yasuhei Shimada is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of piezoelectric technology, holding a total of 12 patents. His innovative work has paved the way for advancements in various applications, particularly in driving cold cathode tubes.

Latest Patents

Shimada's latest patents include an inverter and method for driving a plurality of cold cathode tubes. This invention features a drive circuit for a piezoelectric transformer that includes a master block with a drive frequency control circuit. This circuit controls the frequency of the drive voltage for the piezoelectric transformer. Additionally, it has at least one slave block that receives the output from the master block and includes a drive voltage control circuit. This circuit manages the peak value of the drive voltage for the piezoelectric transformer. The design also incorporates a PWM-modulation circuit for the drive voltages applied to the piezoelectric transformers, ensuring that the drive voltages are in phase. Furthermore, it includes a circuit to suppress harmonic components of the light adjusting frequency in the drive voltages. This innovative arrangement allows for the elimination of limitations in the number of tubes that can be lit, reduces brightness discrepancies, and prevents flickering and audible sound generation.

Another notable patent is the piezoelectric transformer driver. In this invention, a rectified voltage from the output current of the piezoelectric transformer is compared with a reference voltage. The system adjusts the oscillation frequency of a voltage-controlled oscillator to increase or reduce the output voltage of the piezoelectric transformer. This dynamic adjustment ensures optimal performance, even when the load is open-circuited.

Career Highlights

Throughout his career, Yasuhei Shimada has worked with notable companies such as NEC Corporation and Nippon Electric Co., Ltd. His experience in these organizations has contributed to his expertise in the field of electrical engineering and innovation.

Collaborations

Shimada has collaborated with esteemed colleagues, including Nobuaki Honbo and Shingo Kawashima. Their combined efforts have led to advancements in piezoelectric technology and its applications.

Conclusion

Yasuhei Shimada's contributions to the field of piezoelectric technology are noteworthy. His innovative patents and collaborations have significantly impacted the industry, showcasing his dedication to advancing

Profile summary based on public USPTO records.

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]