Company Filing History:
Years Active: 1979-1987
Title: Naomitsu Watanabe: Innovator in Color Picture Tube Technology
Introduction
Naomitsu Watanabe is a prominent inventor based in Mobara, Japan. He has made significant contributions to the field of display technology, particularly in the development of color picture tubes. With a total of 7 patents to his name, Watanabe's work has had a lasting impact on the industry.
Latest Patents
Watanabe's latest patents include innovative designs for index type color picture tubes. One of his notable inventions features a stripe type fluorescent screen that incorporates strips of zinc sulfide-based green and blue color phosphors, along with a red color phosphor. This red phosphor is a mixture of a Y.sub.2 O.sub.2 S:Eu phosphor containing minimal amounts of terbium and a Y.sub.2 O.sub.3:Eu phosphor. His designs ensure a uniform current-brightness characteristic across tricolor phosphors, resulting in less variation in the white color tone of the reproduced picture, even under varying current conditions.
Another patent focuses on an index type color picture tube that includes a stripe type fluorescent screen with stripe-shaped phosphor layers for green, blue, and red colors. The red color phosphor layer in this design comprises a Y.sub.2 O.sub.2 S:Eu phosphor containing specific amounts of terbium and praseodymium, enhancing the performance of the display.
Career Highlights
Watanabe is currently associated with Hitachi, Ltd., where he continues to innovate in the field of display technology. His work has been instrumental in advancing the capabilities of color picture tubes, making them more efficient and effective for various applications.
Collaborations
Throughout his career, Watanabe has collaborated with notable colleagues, including Yoshifumi Tomita and Kiyoshi Miura. These collaborations have contributed to the development of cutting-edge technologies in the display sector.
Conclusion
Naomitsu Watanabe's contributions to the field of color picture tube technology have established him as a key figure in the industry. His innovative patents and collaborations reflect his commitment to advancing display technology.