Company Filing History:

12 out of 49

Phoenix Electric Co., Ltd.

patents

2 out of 266

Toshiba Materials Co., Ltd.

4. 1 out of 832,843

Other

patents

where one patent can have more than one assignee

Years Active: 1989-2019

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15 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 10368409 - Light emitting device and LED light bulb (2019-07-30),

2. 10368408 - Light emitting device and LED light bulb (2019-07-30),

3. 9148926 - LED lamp (2015-09-29),

4. 8040077 - Starting circuit of starting device for high-pressure discharge lamp including auxiliary light source, starting device including the starting circuit, and lighting system including the starting device (2011-10-18),

5. 7808167 - High-pressure discharge lamp and light sources device using the same (2010-10-05),

6. 7576494 - High voltage discharge lamp lighting method, lighting apparatus and image device using that lighting apparatus (2009-08-18),

7. 7517093 - Projection-type system and method of operating the same (2009-04-14),

8. 7504780 - Power supply unit for light source and method of controlling the same (2009-03-17),

9. 7478928 - Light source device (2009-01-20),

10. 7348737 - Lighting circuit for high-pressure discharge lamp (2008-03-25),

11. 7306340 - Projection system using a high-pressure discharge lamp adapted to d.c. lighting, and method of operating the same (2007-12-11),

12. 6914393 - Method and device for lighting high pressure discharge lamps (2005-07-05),

13. 6788009 - Method and device for lighting ultra-high pressure discharge lamps (2004-09-07),

14. 6285130 - Metal halide lamp (2001-09-04),

15. 4802300 - Fishing hook (1989-02-07),

Title: The Innovations of Toshitaka Fujii

Introduction

Toshitaka Fujii is a prominent inventor based in Himeji, Japan. He has made significant contributions to the field of light-emitting devices, holding a total of 14 patents. His work has advanced the technology behind LED lighting, making it more efficient and versatile.

Latest Patents

Fujii's latest patents include innovative designs for light-emitting devices and LED light bulbs. One of his notable inventions features a first white light source composed of multiple first white light-emitting diodes, which emits a first white light. Additionally, it includes a second white light source made up of second white light-emitting diodes, connected in series with a resistance element. This configuration allows the device to emit a mixed white light, combining the outputs of both sources. The design ensures that the drive voltage of the first white light source is higher than that of the second, resulting in a higher color temperature and total luminous flux of the mixed white light.

Career Highlights

Throughout his career, Fujii has worked with notable companies such as Phoenix Electric Co., Ltd. and Toshiba Materials Co., Ltd. His experience in these organizations has contributed to his expertise in developing advanced lighting technologies.

Collaborations

Fujii has collaborated with several talented individuals in his field, including Atsuji Nakagawa and Hiroyasu Kondo. These partnerships have fostered innovation and creativity in his projects.

Conclusion

Toshitaka Fujii's contributions to the field of light-emitting devices have made a significant impact on modern lighting technology. His innovative patents and collaborations highlight his dedication to advancing this essential area of research.

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