Keiji Fukuyama

This inventor holds 16 USPTO granted patents, primarily in Display Technology. Top assignee: Mitsubishi Denki Kabushiki Kaisha. Active years: 1979-2003.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Keiji Fukuyama. Retrieved from https://idiyas.com/inventor/keiji-fukuyama

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

Calculating rank

USPTO Granted Patents = 16

% Patents Active = 87.5

Average Co-Inventor Count = 5.3

ph-index = 7

Forward Citations = 116(Granted Patents)

Location History:

Kanagawa, JP (1990 - 1995)
Kamakura, JP (1979 - 1996)
Tokyo, JP (2003)

Company Filing History:

16 out of 21,351

Mitsubishi Denki Kabushiki Kaisha

patents

Years Active: 1979-2003

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Areas of Expertise:

Ultraviolet Ray Conversion

Display Device

Cathode

Electron Tube

Planar Display

Flat Display

Discharge Light Source

Metal Vapor Lamp

Electrode

Discharge Lamp

Hot Cathode

Manufacturing Method

16 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 6583561 - Material for converting ultraviolet ray and display device using the same (2003-06-24),

2. 6545397 - Cathode for electron tube (2003-04-08),

3. 5587627 - Planar display apparatus having exposed insulated substrate portion (1996-12-24),

4. 5495146 - Planar display apparatus (1996-02-27),

5. 5436530 - Flat display apparatus with supplemental biasing (1995-07-25),

6. 5122707 - Cathode in a cathode ray tube (1992-06-16),

7. 5118984 - Electron tube cathode (1992-06-02),

8. 5073743 - Electrode for discharge light source (1991-12-17),

9. 5015497 - Cathode for electron tube and manufacturing method thereof (1991-05-14),

10. 4924137 - Cathode for electron tube (1990-05-08),

11. 4897574 - Hot cathode in wire form (1990-01-30),

12. 4864187 - Cathode for electron tube and manufacturing method thereof (1989-09-05),

13. 4797593 - Cathode for electron tube (1989-01-10),

14. 4345186 - Metal vapor discharge lamp (1982-08-17),

15. 4319158 - Electrode for discharge lamp (1982-03-09),

Title: Keiji Fukuyama: Innovator in Display Technology

Introduction

Keiji Fukuyama is a prominent inventor based in Kanagawa, Japan. He has made significant contributions to the field of display technology, holding a total of 16 patents. His work focuses on improving luminous efficiency and electric-light conversion in display devices.

Latest Patents

Fukuyama's latest patents include a material for converting ultraviolet rays and a display device utilizing this technology. The objective of this invention is to enhance the luminous efficiency of gas discharge display devices by effectively using ultraviolet rays. These rays are absorbed in partition walls or protective films without contributing to the excitation of fluorescent materials. By incorporating gadolinium into the materials surrounding the discharge cell, ultraviolet rays with a wavelength of 315 nm are generated, which can excite the fluorescent material, ultimately improving electric-light conversion efficiency. Another notable patent is for a cathode for an electron tube, which features a base containing a reducing agent and a tungsten metal layer. This design controls the deformation of the base during operation, making it suitable for cathode-ray tubes used in displays.

Career Highlights

Fukuyama is associated with Mitsubishi Electric Corporation, where he has been instrumental in advancing display technologies. His innovative approaches have led to significant improvements in the efficiency and performance of electronic displays.

Collaborations

Throughout his career, Fukuyama has collaborated with notable colleagues, including Keiji Watanabe and Masato Saito. These partnerships have fostered a collaborative environment that encourages innovation and the development of cutting-edge technologies.

Conclusion

Keiji Fukuyama's contributions to display technology have made a lasting impact on the industry. His innovative patents and collaborations continue to drive advancements in the field, showcasing his dedication to improving electronic display systems.

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]