Inventors with similar research interests:
Location History:
- Koganei, JP (1984 - 1989)
- Mobara, JP (1990 - 2005)
Company Filing History:
52 out of 42,485 
7 out of 217 
2 out of 23 
Years Active: 1984-2005
Title: **The Innovative Contributions of Shoji Shirai**
Introduction
Shoji Shirai, an esteemed inventor based in Mobara, Japan, has made remarkable contributions to technology, holding an impressive 56 patents throughout his career. His inventions primarily focus on advancements in electron gun technology, particularly in color cathode ray tubes and projection tubes.
Latest Patents
Shirai's latest patents showcase his expertise and innovation in the field. One of his notable inventions is the **Color Cathode Ray Tube**. This invention features an electron gun that includes a cathode, a control electrode, an acceleration electrode, a focusing electrode, and an anode. It uniquely incorporates a longitudinally elongated concave shape that surrounds the electron beam aperture. This design reduces beam spot shape non-uniformity caused by deflection, facilitating optimum focusing across the screen.
Another significant patent is the **Projection Tube Having Different Neck Diameters**. This invention addresses the challenge of maintaining high focusing performance with low deflection power in projection systems intended for high-voltage operations. The design features a smaller neck outer diameter where the deflection yoke attaches compared to where the electron gun is housed. The maximum anode voltage can exceed 25 kilovolts, while the maximum beam current can reach 4 milliamperes.
Career Highlights
Shoji Shirai's professional journey includes important positions at reputable organizations such as Hitachi, Ltd. and Hitachi Device Engineering Co., Ltd. His career has been marked by a commitment to innovation and improvements in display technologies.
Collaborations
Throughout his career, Shirai has collaborated with notable professionals, including Go Uchida and Kenichi Watanabe. These collaborations have likely contributed to the rich exchange of ideas and innovations in their respective fields.
Conclusion
In conclusion, Shoji Shirai's contributions to technology and his impressive portfolio of patents reflect a dedication to advancing electronic display technology. His work has not only improved the performance of cathode ray tubes and projection systems but also serves as an inspiration for future inventors in the field.
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