Company Filing History:
5 out of 42,508 
1 out of 203 
Years Active: 1995-1998
Title: Innovations by Tomohiko Douken in CRT Display Technology
Introduction
Tomohiko Douken, an accomplished inventor based in Hitachi, Japan, has made significant contributions to the field of display technology. With a total of five patents to his name, Douken has focused primarily on enhancing the performance and efficiency of cathode-ray tube (CRT) displays. His innovative approaches have positioned him as a notable figure in the tech industry.
Latest Patents
One of Douken's key patents is for a CRT display device that features a comprehensive housing design with an integrated ground terminal and an opening. This design includes a shadow mask, which allows an electron beam to irradiate the tube face, thereby displaying images across the entire opening. Notably, this invention incorporates an electrically conductive shield that aligns with parts of the CRT display device, effectively preventing alternating electric fields and electromagnetic waves from leaking out without compromising display performance.
Another significant patent involves a method for detecting horizontal and vertical synchronizing frequencies in a CRT display device. Douken's approach calculates a moire adjusting signal to alternate the position of the displayed image horizontally, enhancing the visual experience by adjusting it in relation to the display's characteristics.
Career Highlights
Throughout his career, Tomohiko Douken has collaborated with major companies in the electronics industry, including Hitachi, Ltd. and Hitachi Media Electronics Co., Ltd. His work at these organizations has allowed him to develop and refine his innovative ideas in CRT technology.
Collaborations
In addition to his corporate affiliations, Douken has worked alongside esteemed colleagues such as Kikuo Tomita and Kazuo Kato. These collaborations have fostered a productive exchange of ideas and have contributed to the successful realization of several groundbreaking inventions in the realm of display technology.
Conclusion
Tomohiko Douken's inventive spirit and dedication to improving CRT display devices have resulted in several noteworthy patents. His work has not only advanced technology in his field but has also paved the way for future innovations in display systems. As the industry progresses, Douken's contributions remain an essential part of the legacy of CRT technology.